期刊
APPLIED PHYSICS LETTERS
卷 101, 期 23, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4769374
关键词
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资金
- Center for Energy Efficient Materials, an Energy Frontier Research Center
- U.S. DOE, BES [DE-SC0001009]
- UCSB Solid State Lighting and Energy Center
- Direct For Computer & Info Scie & Enginr [960316] Funding Source: National Science Foundation
- Division Of Computer and Network Systems [960316] Funding Source: National Science Foundation
We use theoretical modeling to investigate the effect of polarization fields and non-radiative Auger recombination on the efficiency-droop and green-gap problems of polar and nonpolar nitride light-emitting diodes. The dependence of radiative and nonradiative recombination rates on electron-hole wave-function overlap is analyzed. Device designs that minimize the polarization fields lead to higher efficiency, not because the internal quantum efficiency is improved at a given carrier density but because they can be operated at a lower carrier density for a given current density. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769374]
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