Optimisation of GaN LEDs and the reduction of efficiency droop using active machine learning

Rouet-Leduc, Bertrand; Barros, Kipton Marcos; Lookman, Turab; Humphreys, Colin J.

doi:10.1038/srep24862

Title: Optimisation of GaN LEDs and the reduction of efficiency droop using active machine learning

Journal Article · Tue Apr 26 00:00:00 EDT 2016 · Scientific Reports

DOI:https://doi.org/10.1038/srep24862· OSTI ID:1335601

Rouet-Leduc, Bertrand ^[1];

^[2]; Lookman, Turab ^[2]; Humphreys, Colin J. ^[3]

Univ. of Cambridge (United Kingdom). Dept. of Materials Science and Metallurgy; Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
Univ. of Cambridge (United Kingdom). Dept. of Materials Science and Metallurgy

A fundamental challenge in the design of LEDs is to maximise electro-luminescence efficiency at high current densities. We simulate GaN-based LED structures that delay the onset of efficiency droop by spreading carrier concentrations evenly across the active region. Statistical analysis and machine learning effectively guide the selection of the next LED structure to be examined based upon its expected efficiency as well as model uncertainty. This active learning strategy rapidly constructs a model that predicts Poisson-Schrödinger simulations of devices, and that simultaneously produces structures with higher simulated efficiencies.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of Cambridge (United Kingdom)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-06NA25396; 20140013DR

OSTI ID:: 1335601

Report Number(s):: LA-UR-15-27950

Journal Information:: Scientific Reports, Vol. 6; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 38 works

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Multi-objective Optimization for Materials Discovery via Adaptive Design Gopakumar, Abhijith M.; Balachandran, Prasanna V.; Xue, Dezhen Scientific Reports, Vol. 8, Issue 1 https://doi.org/10.1038/s41598-018-21936-3	journal	February 2018
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