期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.245501
关键词
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资金
- U.S. Department of Energy (DOE) [DE-AC02-05CH11231]
- National High Technology Research and Development Program of China (863 Program) [2011AA03A103]
- Ministry of Science and Technology of China [2011DFR50390]
- Chinese Academy of Sciences (CAS)
Nonradiative carrier recombination is of both applied and fundamental interest. Here a novel algorithm is introduced to calculate such a deep level nonradiative recombination rate using the ab initio density functional theory. This algorithm can calculate the electron-phonon coupling constants all at once. An approximation is presented to calculate the phonon modes for one impurity in a large supercell. The neutral Zn impurity site together with a N vacancy is considered as the carrier-capturing deep impurity level in bulk GaN. Its capture coefficient is calculated as 5.57 x 10(-10) cm(3)/s at 300 K. We found that there is no apparent onset of such a nonradiative process as a function of temperature.
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