Beyond Blue: New Horizons in Nitrides
Lead Research Organisation:
University of Manchester
Department Name: Physics and Astronomy
Abstract
Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.
Publications
Barrett R
(2021)
Effect of Micron-scale Photoluminescence Variation on Droop Measurements in InGaN/GaN Quantum Wells
in Journal of Physics: Conference Series
Binks D
(2022)
Cubic GaN and InGaN/GaN quantum wells
in Applied Physics Reviews
Binks D
(2022)
Cubic GaN and InGaN/GaN quantum wells
Blenkhorn WE
(2018)
Resonant photoluminescence studies of carrier localisation in c-plane InGaN/GaN quantum well structures.
in Journal of physics. Condensed matter : an Institute of Physics journal
Christian G
(2016)
Room temperature PL efficiency of InGaN/GaN quantum well structures with prelayers as a function of number of quantum wells
in physica status solidi c
Christian G
(2018)
Recombination from polar InGaN/GaN quantum well structures at high excitation carrier densities
in Physical Review B
Christian G
(2018)
Effects of a Si-doped InGaN Underlayer on the Optical Properties of InGaN/GaN Quantum Well Structures with Different Numbers of Quantum Wells.
in Materials (Basel, Switzerland)
Description | Droop in the efficiency of Nitride LEDs is one of the factors limiting their widespread deployment. We have found that droop occurs in bothy polar and nonpolar quantum well yielding important information non the underlying physics. More recent work on droop has revealed the role of excited localised states. Preliminary work on cubic GaN has shown great promise. We have been awarded a 3 year EPSRC grant to extend the work on cubic material. We have found that there is significant micron-scale variation in the emission efficiency across the QW, and that correlation of the properties of the emission (i.e. peak energy and intensity) are different in green emitting and blue emitting samples, indicating that different recombination mechanisms dominate. This has initiated a PhD project to explore this phenomenon which will try and relate this behaviour to differences in the microstructure. |
Exploitation Route | This work will help with the understanding of efficiency droop in LEDs. The development of cubic GaN could lead to a new generation of LED materials |
Sectors | Digital/Communication/Information Technologies (including Software),Electronics,Energy |
Description | Several grant proposals were made to EPSRC, including two Program grant proposals, a proposal for an Industrial Hub and a responsive mode application. The latter was successful. |
First Year Of Impact | 2016 |
Sector | Digital/Communication/Information Technologies (including Software),Electronics,Energy,Healthcare |
Impact Types | Societal |
Description | EPSRC Responsive mode |
Amount | £495,375 (GBP) |
Funding ID | EP/R010250/1 |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 02/2018 |
End | 12/2020 |
Title | Research data supporting "Local carrier recombination and associated dynamics in m-plane InGaN/GaN quantum wells probed by picosecond cathodoluminescence" |
Description | Research data in support of the publication "Local carrier recombination and associated dynamics in m-plane InGaN/GaN quantum wells probed by picosecond cathodoluminescence". We have included the original data (tab-separated text files) as plotted for the quantum wells, measured by spatially- and time-resolved cathodoluminescence. |
Type Of Material | Database/Collection of data |
Year Produced | 2016 |
Provided To Others? | Yes |
Description | Collaboration with Tyndall Insitute |
Organisation | University College Cork |
Department | Tyndall National Institute |
Country | Ireland |
Sector | Academic/University |
PI Contribution | Input to theory work done at Tyndall Institute |
Collaborator Contribution | Theoretical input to program |
Impact | Significant number of papers |
Start Year | 2009 |
Description | Cubic GaN |
Organisation | Anvil Semiconductors |
Country | United Kingdom |
Sector | Private |
PI Contribution | This work is part of a joint program of work between us, the University of Cambridge and Anvil Semiconductors |
Collaborator Contribution | Anvil Semiconductors provide the substrate materials for our program on cubic GaN |
Impact | EPSRC responsive mode grant proposal that commenced Feb 2018 |
Start Year | 2016 |
Description | Exhibit at Blue Dot |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | National |
Primary Audience | Public/other audiences |
Results and Impact | Exhibit at Blue Dot of LED lighting science, Blue Dot is a major science festival held at Jodrell Bank. |
Year(s) Of Engagement Activity | 2016 |
Description | University of the 3rd Age |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | Regional |
Primary Audience | Public/other audiences |
Results and Impact | Talk to organisation that provides forum for people in retirement to hear about scientific developments |
Year(s) Of Engagement Activity | 2016 |