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Title: Lattice-constant and band-gap tuning in wurtzite and zincblende BInGaN alloys

Journal Article · · Journal of Applied Physics
DOI: https://doi.org/10.1063/1.5108731 · OSTI ID:1577601

InGaN light-emitting diodes (LEDs) are more efficient and cost effective than incandescent and fluorescent lighting, but lattice mismatch limits the thickness of InGaN layers that can be grown on GaN without performance-degrading dislocations. Here, we apply hybrid density functional theory calculations to investigate the thermodynamic stability, lattice parameters, and bandgaps of wurtzite and zincblende quaternary BInGaN alloys. We discover that the wurtzite phase is more stable and can be lattice matched to GaN for BInGaN compositions containing up to ~30% boron. The lattice match with GaN decreases strain and enables thicker active layers that mitigate Auger recombination and increase the efficiency of the LEDs. The bandgap of the alloy remains tunable throughout the visible spectrum. Our results indicate that BInGaN alloys are promising alternatives to InGaN for high-efficiency, high-power LEDs.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF); USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1577601
Alternate ID(s):
OSTI ID: 1545963
Journal Information:
Journal of Applied Physics, Vol. 126, Issue 5; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (10)