期刊
JOURNAL OF APPLIED PHYSICS
卷 130, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/5.0059014
关键词
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资金
- Sustainable Energy Authority of Ireland
- Science Foundation Ireland [17/CDA/4789, 12/RC/2276 P2]
- Deutsche Forschungsgemeinschaft (DFG) [EXC2046]
- Science Foundation Ireland (SFI) [17/CDA/4789] Funding Source: Science Foundation Ireland (SFI)
This study investigates the impact of random alloy fluctuations and quantum corrections on uni-polar electron transport in (In,Ga)N quantum well systems, revealing significant effects on current-voltage characteristics. However, the importance of quantum corrections and random alloy fluctuations may vary between single and multi-quantum well systems.
Random alloy fluctuations significantly affect the electronic, optical, and transport properties of (In,Ga)N-based optoelectronic devices. Transport calculations accounting for alloy fluctuations currently use a combination of modified continuum-based models, which neglect to a large extent atomistic effects. In this work, we present a model that bridges the gap between atomistic theory and macroscopic transport models. To do so, we combine atomistic tight-binding theory and continuum-based drift-diffusion solvers, where quantum corrections are included via the localization landscape method. We outline the ingredients of this framework in detail and present first results for uni-polar electron transport in single and multi- (In,Ga)N quantum well systems. Overall, our results reveal that both random alloy fluctuations and quantum corrections significantly affect the current-voltage characteristics of uni-polar electron transport in such devices. However, our investigations indicate that the importance of quantum corrections and random alloy fluctuations can be different for single and multi-quantum well systems.
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