Smart Flexible Quantum Dot Lighting

Lead Research Organisation: University of Cambridge
Department Name: Engineering

Abstract

cQD are attracting significant interest as the key components for next-generation smart displays/lightings, photo detectors and image sensors, and solar cells. This is because they show excellent and unique physical properties such as i) high sensitivity and quantum efficiency, ii) excellent colour gamut with narrow emission (absorption) bandwidths, iii) colour tunability/band gap engineering through size control, iv) high photostability and v) high air stability as they are based on inorganic materials. Therefore, since the latest results on cQD LEDs and image sensors/photodetector have demonstrated the possibility of integration of cQD optoelectronics with current semiconducting technologies, the pace of research in the cQD area has been accelerated dramatically and an increasing number of research groups and companies are currently active in this area worldwide.
The investigators expect that cQD LED will replace current technologies through: (1) Superior reliability of the inorganic structure in an almost air barrier free architecture w.r.t OLED (WVTR of 10-6 g/m2/day), (2) Lower power consumption and low product cost, 60 and 50 % less than current OLED, respectively, and (3) Colour purity of 110% or greater compared to typically 80% for OLED.
This project will address will enhance the current state of the art to achieve cost reduction through using continuous, as opposed batch, cQD synthesis, mono layer resin free processing, all inorganic interface materials such as ETL (electron transport layer) and HTL (hole transport layer), device integration and packaging for EL cQD LED, with Cd-free cQDs for smart lighting and displays.
The project proposed builds upon research established in the investigators' groups in Cambridge and Oxford. We are well equipped with facilities for pilot fabrication using technologies which will underpin the commercialisation of cQD LED based lighting/displays. The final deliverable will be energy efficient 4" active devices with predictable life times, and sustainable high brightness for flexible smart lighting. The elements of the smart light which will include colour hue and brightness control based on active matrix switching of pixels will also be applicable to displays, but without the same high pixel definition.
We shall explore the design and synthesis of Cd-free cQDs with the core/shell structures using continuous flow production methods which can then be incorporated into active devices. Key to successfully implementing devices are the scalable production of high quality cQDs with specific surface passivation and functionalisation which limit the effects of impurities and defects and produce high quality thin films with well understood interfaces. In this project we will use scalable production techniques that can be transferred to in-line process for mass production. We shall focus on the manufacturing and processing aspects to create mono layer-controlled cQD films with entire close-packed and almost void free structure using dry-transfer printing methods. This will enhance efficiency and reliability of film for the desired mode of devices. Interface control based on a monolayer level layer-by-layer transfer process will be employed in order to obtain highly uniform monolayers which can be expanded to multilayer stacked film processing including interface layers. The interface materials for emissive cQD film with inorganic HTL and ETL layer for EL devices will also be designed and fabricated at the device integration step (WP 2-3). Driving electronics using TFTs will be designed for reliable and stable operation.
Industrial partners in the supply chain for smart flexible lighting production, are: CDT Ltd for materials, lighting, metrology; CPI Ltd, Dupont-Teijin Films UK for flexible films for lighting; Emberion UK, Dyson, FlexEnable, Samsung UK for device processing, and system integration; Aixtron UK for TCF; Nanoco and Merck as materials suppliers and EAB members.

Planned Impact

Science and technological innovation on colloidal Quantum Dots (cQD) has the potential to increase energy efficiency in visual and lighting systems while also enabling new paradigms of functionality. This project will advance cQD-based scalable materials, their manufacturing processes and device fabrication tools, which can be used holistically to enhance the manufacturability, reliability and as a result cost of devices. We are supported by a consortium of UK industrial partners, which have the capability to translate the research into commercial impact. Therefore, in terms of impact, our primary aim is to maximise opportunities for the UK to develop and grow its scientific and industrial leadership and deploy transformative manufacturing platform technologies into a new generation of smart flexible cQD displays and lighting systems. The UK electronic industry employs more than 800,000 people and contributes to more than 5% of GDP. Also UK photonics counts 1500 companies employing another 70,000 people with £10.5bn output and 8% CAGR. Crucially, the scope of this project encompasses the broader integration challenges of electronics, photonics, materials and manufacturing process. Recent market analysis forecast that cQDs will enable a market for devices and components worth over $11bn by 2026. The demand for cQDs will grow from less than 100 kg today to several tons over the next decade. The UK plays a key role in advancing the fundamental research fields of materials and device manufacturing process and tools and is a key contributor to the supply chain with cQD materials, Know-how and IP. Specifically, the UK leads in the field of cQD materials and related IP generation serving the global markets of lighting, displays, solar cell, optical sensors, and healthcare, based on cQD technologies, with access to a SAM in excess of $8.65bn worldwide by 2022. The Universities of Cambridge and Oxford, in partnership, will play a pivotal role driving innovation through the emerging field of smart flexible lighting and possible expansion to displays.
Although competition is fierce, the global marketplace is huge with much space for regional and application based customisation within the context of smart lighting. The emerging smart lighting market presents an opportunity worth at least £1bn/pa globally since 2020. This is especially relevant for SMEs and start-ups which can use the technology for lighting design within the creative industries. A whole new market around creative lighting is poised to emerge once QD based smart lighting becomes available. The UK, with its lead role in the creative and service industries, is well placed to become a global leader in these new markets based around smart lighting. To support relationships with industry we will engage with Cambridge Knowledge Transfer Facilitators, as well as with both Cambridge Enterprise and Isis Innovation. Activities might include regional research symposia and the development of a series of 'Industry Briefing' notes disseminated both as press releases and directly to the companies identified through market research. We will work closely with our UK industrial partners; both those we have currently identified and those we intend to recruit as the project unfolds, and establish links to other government.
Consumers will ultimately benefit from improvements to manufacturing underpinned by this innovative science. Understanding how this science positively benefits their lives is important if ground-breaking science of this kind is to be valued and supported in the future. The academic team will be responsible for distilling the key messages of the project into 'lay terms' accessible to the public. This will form the backbone of all communications with the public whether online, through print, at events or in presentations. Communicating these core messages will be the responsibility of all members of the consortium.
 
Description First reporting period (~ Mar 2019)
1) Design and assembly of new apparatus for various QD material fabrication and functionalisation with continuous-flow methodology.
2) Design and assembly of new monolayer transfer printing technology with high precision of pixel patterning and alignment.
3) Design and fabrication of TFT backplane and smart QD lighting system with various semiconducting and emissive materials.
4) Implementation of new computational modelling for ultra high-resolution QD image processing and crystal structure simulations.

Second reporting period (~ Mar 2020)
5) Synthesis and solidification of Cd-free Quantum dot materials and surface treatment with continuous flow methodology.
6) Fabrication of white quantum dot LEDs with various device architectures with high precision pixel patterning and alignment by transfer printing technology
7) Demonstration of smart QD lighting system comprised of highly precise pixelated QLED devices with multi-colour emission and metal oxide TFT back plane.
8) Colour rendering models for analysing the sensitivity of device architectures and process parameters towards QD primary properties, exploring potential solutions, and confirming the validation for future smart lighting applications.
9) Implementation and prototyping of lighting textile with QLEDs by a conventional textile manufacturing technology and semiconductor technologies for smart home and buildings application.
Exploitation Route These new findings will be introduced to our 12 industrial partners for potential commercialisation (e.g. EAB meeting)
Sectors Agriculture, Food and Drink,Chemicals,Creative Economy,Digital/Communication/Information Technologies (including Software),Education,Electronics,Energy,Environment,Healthcare,Government, Democracy and Justice,Manufacturing, including Industrial Biotechology

URL http://www.eng.cam.ac.uk/profiles/jmk71
 
Description Colloidal Quantum Dots (cQD) have emerged from lab curiosities to a multi-billion-dollar component market enabled by these optoelectronic materials. According to major analysts the global quantum dots (QD) based products market will be potentially valued at more than $35 billion by 2030, with the High Definition TV displays dominating the end user segment. It is one of the most relevant success stories of nanotechnology, where bottom-up design of nanoscale materials influences and determines the success of macro-scale device applications across multiple sectors. Since their synthesis, QDs have featured in a range of optoelectronic devices, including TVs and displays, light-emitting devices (LEDs), solar cells, photodiodes, thermoelectrics, photoconductors and field-effect transistors, while QD solutions have been used in a number of in vivo and in vitro sensing and labelling techniques for medical imaging. Cd-free cQD materials have been also demonstrated by major suppliers of QDs such as Nanoco (UK), Nanosys, QD Vision (US), and Merck (Germany), who are among major producers in bulk, of Cd-free cQDs for back light application in LCD displays. Besides Samsung, other device manufacturers and system integrators such as LG and Sony have also demonstrated cQD back-lit units for LCD displays. In 2018, Sales on Samsung's QLED displays (2.687 million sets) were reported exceeding than sales of LG's WOLED display (2.514 million sets) in large area, according to IHS Annual Report. This could be simple evidence of the rapid growth of QD based applications such as displays and lighting areas in the near future. In SmartQD we design and develop new environmentally friendly non-toxic cQD scalable materials, and advance their manufacturing processes with continuous flow and device fabrication tools toward next generation smart lighting applications. We expect that cQD LED may complement or replace current technologies for Smart lighting thanks to their unique characteristics of: i) high colour purity with narrow emission (absorption) bandwidths, ii) colour tunability/band gap engineering through size control, iii) high photostability and lifetime. Design and prototype development of cost-effective cQD LED lighting devices that can be manufactured on flexible substrates and controlled through unique metal oxide based active matrix driver to implement smart aesthetic features are being produced and may be showcased to maximise impact. The design and fabrication of pixel structure with mixed mode of colours are being implemented to create human friendly white lighting emission and will make new manufacturing opportunity of smart QD lighting system, process equipment and related supporting device areas. The manufacturing technologies investigated in SmartQD are expected to create additional markets for cQD based companies in the materials, film component, process and equipment, and lighting device market sectors. In SmartQD we have created a unique team that strengthen core capabilities of Research Associates and PhD students involved in the project. This might help develop careers for future business creation in UK, with highly skilled and trained workforce for UK companies active in the area of cQD technologies and applications. In terms of broader impact we have setup an External Advisory Board of 12 companies (First board meeting on Oct 2019) active in the supply chain and technology development, participated in large events and conferences worldwide and engaged with organisations that provide policy dissemination (Open Access Government) and prepared a 2-page profile for distilling the key messages of the project into 'lay terms' accessible to the public.
Sector Chemicals,Communities and Social Services/Policy,Digital/Communication/Information Technologies (including Software),Electronics,Energy,Environment,Healthcare,Manufacturing, including Industrial Biotechology,Other
Impact Types Societal,Economic,Policy & public services

 
Description Attending EXPO "Science is Wonderful" organised by the European Commission to present our research outcomes and exhibit towards the general public audience.
Geographic Reach Europe 
Policy Influence Type Influenced training of practitioners or researchers
Impact No impacts yet
 
Description Contribution to Open Access Government April publication with 2 pages on SmartQD profile following the EU Commissioner for Science editorial
Geographic Reach Europe 
Policy Influence Type Gave evidence to a government review
URL http://www.openaccessgovernment.org
 
Description SWIFT: Smart Wearable Intelligent Fibre-based Technology
Amount £101,140 (GBP)
Funding ID EP/P02534X/1 
Organisation Engineering and Physical Sciences Research Council (EPSRC) 
Sector Public
Country United Kingdom
Start 07/2017 
End 06/2019
 
Title Architecture of quantum dot LEDs for white lighting 
Description In order to fabricate white quantum dot LEDs, device architectures have been developed with three types of architectures; mixed mode of R,G,B quantum dots LEDs, stacked mode of R,G,B quantum dots LEDs and pixelated mode of R,G,B quantum dots LEDs. 
Type Of Material Improvements to research infrastructure 
Year Produced 2020 
Provided To Others? No  
Impact These device structures enable applications in white emissive QD devices, as needed to implement a smart lighting system. 
 
Title Method for integration of quantum dot LED device into textile system 
Description Integration protocol has been developed to implement lighting textile with quantum dots by conventional textile techniques such as weaving and knitting, which can be demonstrated functional textiles with unlimited scale of size, free form factor, three dimensional design and architecture. 
Type Of Material Improvements to research infrastructure 
Year Produced 2020 
Provided To Others? No  
Impact The novel approach can be achieved to implement multi-functional textiles with fibre-based components and systems such as lighting, sensing and energy, for smart home and building applications. 
 
Title New materials and manufacturing methods 
Description New quantum dot-based materials have been developed that can be deposited by transfer printing methods to make improved devices. The transfer printing method and equipment and process has been optimised for that. 
Type Of Material Improvements to research infrastructure 
Year Produced 2018 
Provided To Others? No  
Impact N.A. 
 
Title Surface treatment of manufactured quantum dots 
Description We have developed the solidification process for a large amount of synthesized quantum dots by surface treatment. The manufactured QDs can be preserved without any degradation as time goes. 
Type Of Material Improvements to research infrastructure 
Year Produced 2020 
Provided To Others? No  
Impact Quantum dots materials have been synthesized and dispersed in the suitable solvents with a specific concentration for targeted applications. However, higher concentration could be facilized to aggregate quantum dots each other. So, keeping a large amount of QDs in solution is not a good approach. The method we developed pave a way to produce fresh QDs for a long while. 
 
Title Algorithms for electron microscopy image reconstructions and crystal structure simulations 
Description We have been developing in-house Matlab scripts to carry out electron microscopy image reconstructions and crystal structure simulations using exit-wave reconstruction approaches which are coupled to density functional theory (DFT) calculations. 
Type Of Material Data analysis technique 
Year Produced 2018 
Provided To Others? No  
Impact These new image processing and structure simulation approaches have been primarily applied to quantum dot synthesis and optoelectronic device fabrication to provide theoretical and structural guidance. 
 
Title Algorithms for structure searching and sampling 
Description We have been developing in-house python scripts to carry out structure searching and sampling using stochastic approaches which are coupled to density functional theory (DFT) calculations. 
Type Of Material Computer model/algorithm 
Year Produced 2019 
Provided To Others? No  
Impact The generation of model structures of bulk, slab and nanocrystals from complex materials. 
 
Title Database of alloyed quantum-dot core and shell materials and electron transport layers 
Description Structure, Total Energy, Band Gap, Hole and Electron effective masses, Absorption spectra 
Type Of Material Database/Collection of data 
Year Produced 2020 
Provided To Others? No  
Impact We are finding new compositions for high-performance quantum-dot LEDs that do not contain toxic elements (Cd, Pb, Hg), comply with regulations and can be tuned for different applications and operation modes. We are also optimizing oxide ETL materials for better band alignment and charge transfer properties. 
 
Title Database of quantum dot materials 
Description Database of DFT calculations on bulk, slab and quantum dot models of materials containing Cu, Zn, In, S. 
Type Of Material Database/Collection of data 
Year Produced 2019 
Provided To Others? No  
Impact The database is used to explore the impact of structure and bonding to the optoelectronic properties of complex quantum dot materials. It can be used to optimize the material properties of quantum dots for different applications and devices. 
 
Title Model for a QD LEDs based smart lighting and human vision 
Description The model was made and using it, end-to-end simulation of hypothetical QD lighting can be carried out. And also, it can be utilized to analyse a sensitivity with respect to QD primary properties, to explore potential solutions, and to check the validation using the aforementioned simulator 
Type Of Material Computer model/algorithm 
Year Produced 2020 
Provided To Others? No  
Impact It also allows the exploration of the impacts of different QD primaries on the lighting characteristics as well as the perceived quality of the lighting element. 
 
Title Physical Model for Electro-Optical Simulation of QD-LEDs for smart lighting 
Description We have been developing user-friendly source codes for simulating electro-optical properties of QD-LEDs. The computer model deals with the dynamic behaviour of electron/holes and their light emissions in the quantum dot layers. 
Type Of Material Computer model/algorithm 
Year Produced 2020 
Provided To Others? No  
Impact - It is expected to perform sophisticated simulation for QD-LED devices. With the given simulation model, the computer-aided design of QD-LED device can be possible by analysing and optimizing the material and design parameters of QD-LEDs. This will help to save a lot of efforts to optimize the QD-LED device for smart lighting. 
 
Description Academic partner: EPSRC Centre for Innovative Manufacturing in Large-Area Electronics 
Organisation Engineering and Physical Sciences Research Council (EPSRC)
Department Centre for Innovative Manufacturing in Large-Area Electronics
Country United Kingdom 
Sector Academic/University 
PI Contribution Introduced the project objectives and technologies to the partner organisation.
Collaborator Contribution The partner organisation has offered the opportunity to disseminate your results through their annual conference innovation in Large-Area Electronics (innoLAE) and to put the project team in contact with other UK industrial players who may wish to collaborate with the project team or to commercialise outputs from this work
Impact The work on Quantum Dot for lighting and displays has been introduced at the 2019 and 2020 editions of InnoLAE conference organised by the Centre
Start Year 2017
 
Description Industrial Partner: Cambridge Display Technology Ltd 
Organisation Cambridge Display Technology
Country United Kingdom 
Sector Private 
PI Contribution Introduction of project objectives and technology to the Industrial partner
Collaborator Contribution The industrial partner has offered to the project team in-kind contribution in terms of: a) use of their measurement expertise including various sized integrating spheres to accurately determine the QD lighting performance; b) a CDT member at senior scientist or above level to give advice and attend project review meetings on a quarterly basis c) other support options as requested on a case by case basis
Impact None yet
Start Year 2017
 
Description Industrial partner: Aixtron Ltd 
Organisation Aixtron Limited
Country United Kingdom 
Sector Private 
PI Contribution Introduction of project objectives and technology to the Industrial partner
Collaborator Contribution Industrial partner offers the project team the use of their state-of-the-art automated material deposition systems ranging from 2-inch all the way up to 300mm scale. These systems are maintained to the highest performance standards and are offered for project use, up to 10 days per year, worth up to £100K GBP in kind per annum. Aixtron systems could be used to produce the graphene which could be used as the flexible transparent electrodes in your lighting devices.
Impact None yet
Start Year 2017
 
Description Industry partner: DuPont Teijin Films (UK) Limited 
Organisation DuPont Teijin Films
Country Global 
Sector Private 
PI Contribution Introduced the project objectives and technologies to the partner.
Collaborator Contribution The industry partner has offered in-kind support in terms of: expert advice on which films to use in the programme, supply films to the group (a combination of both commercially available films or new films currently under development) and participation in meetings where appropriate.
Impact none yet
Start Year 2017
 
Description Industry partner: Dyson 
Organisation Dyson
Country United Kingdom 
Sector Private 
PI Contribution Introduced the project objectives and technologies to the partner.
Collaborator Contribution The industry partner has offered in-kind support in terms of: (a) participation in the Advisory Board, (b) guidance towards useful industrial outputs (e.g. through roadmapping exercises), (c) contributions from an embedded Dyson researcher at Cambridge.
Impact n.a.
Start Year 2017
 
Description Industry partner: Emberion 
Organisation Emberion
Country United Kingdom 
Sector Private 
PI Contribution Introduced the project objectives and technologies to the partner.
Collaborator Contribution Emberion limited provides in-kind contribution by fabricating graphene based optical detectors functionalized with quantum dot materials from the project. Emberion will further characterize the optoelectrical response of these GFET photodetectors to assess the performance and stability of these materials in photodetector applications. It is envisaged that these devices will expand the range of potential applications for the new materials being developed, by creating state of the art photodetectors with high responsivity, initially in the visible range, then moving to the near IR and long wavelength IR as materials become available. Detailed measurements of the photo-response as a function of wavelength, and optical power, along with time resolved measurements, are performed by Emberion personnel and used to benchmark the photodetectors against existing devices.
Impact In 2019 Emberion has produced the first prototypes of quantum dot enhanced broadband camera detectors in VGA format and presented them at the Photonic West conference and exhibition in 2020.
Start Year 2017
 
Description Industry partner: Flexenable 
Organisation FlexEnable Ltd
Country United Kingdom 
Sector Private 
PI Contribution Introduced the project objectives and technologies to the partner.
Collaborator Contribution Flexenable has offered in-kind contribution including: (i) Its backplanes to drive the Quantum Dot cells; (ii) Its Organic LCD (OLCD) module to integrate with the flexible QD smart lighting as a backlight and FE will provide its expertise to evaluate the whole OLCD module; (iii) a Research Engineer who will closely follow the progress of this project and will provide technical inputs from an end user point of view.
Impact none yet
Start Year 2017
 
Description Industry partner: Merck 
Organisation Merck
Department Merck R&D UK
Country United Kingdom 
Sector Private 
PI Contribution Introduced the project objectives and technologies to the partner
Collaborator Contribution Merck KGaA has developed a large portfolio of quantum materials which have properties that are suitable for different applications. Merck has been involved in the research and development of quantum materials since 2008. During the project Merck has confirmed its willingness to support and accompany the development with a variety of state of the art materials as in-kind contribution.
Impact none yet
Start Year 2017
 
Description Industry partner: Nanoco 
Organisation Nanoco
Country United Kingdom 
Sector Private 
PI Contribution Introduced the project objectives and technologies to the partner
Collaborator Contribution Nanoco Technologies Ltd has offered support for this project. Subject to the signing of an appropriate IP agreement by all partners, they will join the External Advisory Board and will supply quantum dot samples to an agreed value over the course of the project
Impact none yet
Start Year 2017
 
Description Industry partner: Samsung 
Organisation Samsung
Country Korea, Republic of 
Sector Private 
PI Contribution Introduced the project objectives and technologies to the partner
Collaborator Contribution Samsung has been making major breakthroughs in Quantum Dot research to spearhead development of highly brighter, ultra high colour purity with colour tunability, easy processing, and its applications to future large area displays, lighting devices and its future applications such as image sensors and detectors. In 2015, Samsung demonstrated the Quantum dot displays in the market with name of Samsung SHUD or Quantum Dot Display. In 2001, Samsung started this quantum dot displays with photo luminescence (PL) and electro luminescence(EL) display and published the first 46 inch Quantum dot displays with PL mode, and this was successfully launched in the market in early 2015. In 2015 they published the first EL monochrome QD display. Samsung technology partnering activities have recognised Cambridge and Oxford experts to be amongst some of the world's highest ranking teams for quantum dots, not only in fundamental materials research but also in the aspects of scaling-up/ mass-production of its materials.
Impact none yet
Start Year 2017
 
Description IndustrySupport: OSRAM Opto Semiconductors GmbH 
Organisation Osram Opto Semiconductors GmbH
Country Germany 
Sector Private 
PI Contribution Presented the project and introduce the technology to the partner
Collaborator Contribution OSRAM Opto Semiconductors GmbH, a 100% subsidiary of the OSRAM GmbH, has more than 30 years of expertise in research, development and production of optical semiconductor components. The major activities are focused on visible and infrared light-emitting diodes (LEDs) and power lasers, based on the material systems InAlGaP, InAlGaN and InAlGaAs. OSRAM Opto Semiconductors has full in-house production capabilities, consisting of facilities for epitaxy, chip processing and device packaging. OSRAM Opto considers the work with quantum dots as an important technological field, especially the development with Cadmium-free quantum dots. The planned processes, i.e. a nano transfer printing process plays an important role in future technologies. They confirmed interest in a collaboration seeking to develop the quantum dot evaluation and the evaluation of the printing process. As technology leader in several optoelectronic markets and application areas even beyond visible light, the activities planned in SmartQD are of interest to Osram Opto Semiconductors. OSRAM Opto Semiconductors GmbH has therefore offered supporting the project by providing time and expertise of Osram Opto Semiconductors scientists partnering on the project, and contributing with their technological expertise, evaluation technique, and suggestions for the exploitation of the project results.
Impact N.A.
Start Year 2017
 
Description Research Partner: Centre for Process Innovation 
Organisation Centre for Process Innovation (CPI)
Country United Kingdom 
Sector Private 
PI Contribution Introduced the project objectives and technologies to the partner
Collaborator Contribution The research partner has offered in-kind support in terms of: a) attendance to project meetings, to provide technical inputs particularly in the area of scale-up b) assisting with the dissemination of the project results c) discussing opportunities for larger collaborative research and development projects d) participation to the project External Advisory Board e) sharing details of technology strategy f) access to partner's equipment and facilities g) promotion to the partner's industrial partner and networks
Impact None yet
Start Year 2017
 
Title Process for the synthesis of semiconductor nanocrystals 
Description The invention relates to a process for the synthesis of semiconductor nanocrystals, comprising mixing a nonaqueous solution of a metal precursor with a solid-state chalcogen and reacting the resulting mixture at a temperature of about 90 °C or greater. In another aspect the invention relates to the use of a solid chalcogen in the heterogeneous synthesis of metal chalcogenide semiconductor nanocrystals. Semiconductor nanocrystals obtainable by the processes of the invention are further provided. In particular, nanocrystalline PbS or PbSe having a band gap of greater than 1.6 eV and/or a photoluminescence emission wavelength of about 440 to about 515 nm, and nanocrystalline ZnS or ZnSe having a photoluminescence emission wavelength of about 410 to about 430 nm, and solar cells comprising such nanocrystals, are provided. 
IP Reference WO2018020240 
Protection Patent application published
Year Protection Granted 2017
Licensed No
Impact New syntheis apparatus has been designed and more than two peer-reviewed papers have been published.
 
Title Heterogeneous continue flow synthesis system 
Description A heterogeneous continue flow synthesis system combines heterogeneous reaction with continue flow methodology to provide a new QD synthesis approaches with easy composition and size alternation. 
Type Of Technology Systems, Materials & Instrumental Engineering 
Year Produced 2017 
Impact QD synthesis yield could be largely increased and different types of materials could be used in this new technology. 
URL https://patents.google.com/patent/WO2018020240A1/en
 
Title Lighting textile with quantum dot LEDs 
Description The quantum dot LEDs (QLEDs) have been integrated into the textile fabricated by conventional weaving techniques. The lighting textile combines semiconductor electronic with conventional textile technologies together such as weaving/knitting. This shows unique properties of flexible, rollable and bendable form factors with emitting bright light. This is the first prototype of textile lighting system with quantum dots. 
Type Of Technology Systems, Materials & Instrumental Engineering 
Year Produced 2020 
Impact The lighting textile technology developed has the potential to demonstrate further electronic textiles with different functions such as energy generation/storage, sensing and amplifier for future smart home applications including lightings and displays. 
 
Title Powder of CIZS quantum dots with emission of red, green and blue 
Description The powder has been synthesized by a heterogeneous continue flow system which developed in the last reporting period. This was conducted with the surface treatment for solidification from QD solution. 
Type Of Technology Systems, Materials & Instrumental Engineering 
Year Produced 2019 
Impact The powder can be utilized to produce fresh quantum dots regardless of performance degradation as time goes. To manufacture QD devices, the QDs in the form of powder is essential to manage a large amount of QDs and supply for device fabrication. 
 
Title Prototype of white colour emissive quantum dot LEDs 
Description The white colour emissive quantum dots LEDs (WQLEDs) have been developed with three device architectures with mixed-mode of R,G,B quantum dots LEDs, stacked mode of R,G,B quantum dots LEDs and pixelated mode of R,G,B quantum dots LEDs. The architectures can be utilized to adjust white colour gamut taking account of both the preference of people and colour rendering. 
Type Of Technology Systems, Materials & Instrumental Engineering 
Year Produced 2020 
Impact During the development of WQLEDs with three device architectures, fundamental aspects have been investigated in the field of materials and interface science for potential standardisation methods of future white lighting applications. 
 
Description Invited talk at InnoLAE 2020 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Industry/Business
Results and Impact Invited talk given by Luigi Occhipinti at InnoLAE 2020 on "Graphene and two-dimensional materials, from production to applications in sensors and opto-electronics"
Year(s) Of Engagement Activity 2020
 
Description Invited talk by Dr. Bo Hou on "Chemically Encoded Self-Organized Quantum Chain Supracrystals with Exceptional Charge and Ion Transport Properties" at ICAE 2019 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Postgraduate students
Results and Impact This talk introduced chemically encoded self-organized PbS quantum chain supercrystals with exceptional charge and ion transport properties for battery applications. The structural properties have been discussed intensively.
Year(s) Of Engagement Activity 2019
 
Description Invited talk by L. Occhipinti on "The Growth, Silicon Integration & Sensing of Graphene and 2D Materials", IDTEchEx, Santa Clara (USA), 20-21 Nov. 2019 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Industry/Business
Results and Impact The talk introduced manufacturing methods and latest research advances of nano materials in smart sensing and optoelectronics, including large-area electronics, quantum dot nano materials for lighting and displays to a wide audience of both the business and the research community.
Year(s) Of Engagement Activity 2019
 
Description innoLAE conference and exhibition 2019 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Industry/Business
Results and Impact CIMLAE organised the innovations in large-area electronics conference and exhibition (innoLAE) which was held in Cambridge from Jan 22-23 2019
231 delegates registered to attend from 110 organisations in 21 countries
Approximately half the delegates were from industry and half from academia
The programme featured 48 speakers and 54 poster presentations covering broad range of topics such as: materials for LAE, devices, manufacturing processes, systems, applications of LAE, e-textiles, bioelectronics and LAE and the circular economy
The event was accompanied by an exhibition area with 24 companies showcasing their products to attendees
Feedback from attendees was very positive with particular appreciation of the balance between academic and industry attendance and presentations and the opportunity that afforded for knowledge exchange. The event received coverage in local press as well as in print and online media from the sector, and social media (#innolae2019).
Year(s) Of Engagement Activity 2019
URL http://www.innolae.org