EPSRC-Royal Society fellowship engagement (2012): Tailoring the Electronic Properties of Semiconducting Transition Metal Dichalcogenides

Lead Research Organisation: Imperial College London
Department Name: Materials

Abstract

Please refer to attached Royal Society application

Planned Impact

Please refer to attached Royal Society application

Publications

10 25 50
 
Description We have identify strategies to synthesize high quality transition metal dichalcogenides in atomically thin form. The novelty is in the high quality and extended size of the materials deposited onto a planar support (SiO2/Silicon). Up until now the synthesis of this materials have been limited to smaller size samples. To achieve this goal, we have gained significant insights on the chemical mechanism behind the synthesis that can be applied to other materials as well. We have shown that the novel use of molecular precursors in the controlled synthesis of mono- and bi-layer WS2 leads to superior material quality compared to the widely used direct sulfidization of WO3-based precursors. Record high room temperature charge carrier mobility up to 52 cm2/Vs and ultra-sharp photoluminescence linewidth of just 36 meV over submillimeter areas demonstrate that the quality of this material supersedes also that of naturally occurring materials. By exploiting surface diffusion kinetics of W and S species adsorbed onto a substrate, a deterministic layer thickness control has also been achieved promoting the design of scalable synthesis routes.
Exploitation Route These findings will help establishing new technologies based on flexible substrates and lightweight ultra thin materials. In specific, they will impact the development of optoelectronic systems based on semiconducting 2D materials where only high quality materials can enable highly efficient light emitting and light harvesting devices. The engaged collaborations will help expanding the potential of these materials exploring different structural devices to investigate their optoelectronic characteristics.
Sectors Electronics,Energy,Healthcare,Manufacturing, including Industrial Biotechology

 
Description The findings have been used to establish new fundamental knowledge in the field of semiconducting 2D materials, beyond graphene. The field of 2D materials can extensively benefit the society, contributing to revolutionizing health care diagnostic wearable systems, energy harvesting devices and telecommunication technologies. The materials synthesized within the scope of this project have attracted interest of industries (BASF, Toshiba) and organizations (Naval Research Laboratories (USA), National Physics Laboratories (UK)) that are now interested in following our synthesis and devices developments to establish collaborations through new grant applications. Further, new academic collaborations have emerged to exploit the optical properties of the synthesized materials, and new grants are following.
Sector Electronics,Energy,Healthcare,Manufacturing, including Industrial Biotechology
Impact Types Societal,Economic

 
Description Marie Sklodowska-Curie Fellowship (project title:Three-Dimensional Graphene Architectures as Templates for Electrochemical Devices)
Amount £144,781 (GBP)
Funding ID 660721 
Organisation European Commission 
Sector Public
Country European Union (EU)
Start 05/2015 
End 05/2017
 
Description Research Fellows Enhancement Award 2017
Amount £100,992 (GBP)
Organisation The Royal Society 
Sector Academic/University
Country United Kingdom
Start 03/2018 
End 12/2021
 
Description Responsive mode
Amount £768,786 (GBP)
Funding ID EP/M022250/1 
Organisation Engineering and Physical Sciences Research Council (EPSRC) 
Sector Academic/University
Country United Kingdom
Start 07/2015 
End 06/2018
 
Description University Research Fellowships Renewals 2017
Amount £486,789 (GBP)
Organisation The Royal Society 
Sector Academic/University
Country United Kingdom
Start 04/2018 
End 04/2021
 
Description Collaboartion with Laboratoire de Physique des Solides, Université Paris Sud 
Organisation University Paris Sud
Department Solid State Physics Laboratory
Country France 
Sector Academic/University 
PI Contribution The goal of the collaborative work is to study quantum transport in 2D systems at low temperature. My research team contributes providing exceptionally high quality materials, monolayer WS2, which can uniquely enable observation of quantum transport phenomena predicted only at this stage.
Collaborator Contribution The partner group is an international renowned expert in quantum transport in mesoscopic systems and low temperature molecular electronics.
Impact One research article is under preparation and there are upcoming presentations at international conferences.
Start Year 2016
 
Description Los Alamos National Laboratory, Exeter University, Univeristy College London 
Organisation Los Alamos National Laboratory
Country United States 
Sector Public 
PI Contribution Synthesis of high quality WS2 and proposal of the design of devices to be fabricates for light emission/harvesting uses (Los Alamos National Laboratory). Synthesis of high quality WS2 and joint discussions of what electronic devices to fabricate (Exeter University). Synthesis of high quality WS2 and proving materials to UCL team for advanced characterizations (University College London).
Collaborator Contribution Synthesis of high quality WS2 and proposal of the design of devices to be fabricates for light emission/harvesting uses (Los Alamos National Laboratory) to be realize by a research assistant of my team spending a secondment at LANL in 2015. Synthesis of high quality WS2 and joint discussions of what electronic devices to fabricate (Exeter University). Synthesis of high quality WS2 and proving materials to UCL team for advanced characterizations (University College London).
Impact All the named collaboration just started.
Start Year 2014
 
Description Los Alamos National Laboratory, Exeter University, Univeristy College London 
Organisation University College London
Country United Kingdom 
Sector Academic/University 
PI Contribution Synthesis of high quality WS2 and proposal of the design of devices to be fabricates for light emission/harvesting uses (Los Alamos National Laboratory). Synthesis of high quality WS2 and joint discussions of what electronic devices to fabricate (Exeter University). Synthesis of high quality WS2 and proving materials to UCL team for advanced characterizations (University College London).
Collaborator Contribution Synthesis of high quality WS2 and proposal of the design of devices to be fabricates for light emission/harvesting uses (Los Alamos National Laboratory) to be realize by a research assistant of my team spending a secondment at LANL in 2015. Synthesis of high quality WS2 and joint discussions of what electronic devices to fabricate (Exeter University). Synthesis of high quality WS2 and proving materials to UCL team for advanced characterizations (University College London).
Impact All the named collaboration just started.
Start Year 2014
 
Description Los Alamos National Laboratory, Exeter University, Univeristy College London 
Organisation University of Exeter
Country United Kingdom 
Sector Academic/University 
PI Contribution Synthesis of high quality WS2 and proposal of the design of devices to be fabricates for light emission/harvesting uses (Los Alamos National Laboratory). Synthesis of high quality WS2 and joint discussions of what electronic devices to fabricate (Exeter University). Synthesis of high quality WS2 and proving materials to UCL team for advanced characterizations (University College London).
Collaborator Contribution Synthesis of high quality WS2 and proposal of the design of devices to be fabricates for light emission/harvesting uses (Los Alamos National Laboratory) to be realize by a research assistant of my team spending a secondment at LANL in 2015. Synthesis of high quality WS2 and joint discussions of what electronic devices to fabricate (Exeter University). Synthesis of high quality WS2 and proving materials to UCL team for advanced characterizations (University College London).
Impact All the named collaboration just started.
Start Year 2014
 
Description Conferences, Graphene 2014, Tolouse France 2014 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Type Of Presentation paper presentation
Geographic Reach International
Primary Audience Professional Practitioners
Results and Impact The talks has sparked several questions, afterwards discussion over lunch.

Visit to reciprocal laboratories and proposal for exchanging samples and starting collaborations.
Year(s) Of Engagement Activity 2014
URL http://www.mrs.org/spring2014/