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arXiv 0904.3559cond-mat.mtrl-scicond-mat.other
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氮化物俄歇复合率的第一性原理

Auger recombination rates in nitrides from first principles

Kris T. Delaney, Patrick Rinke, Chris G. Van de Walle

摘要:

我们报告俄歇复合率纤锌矿InGaN计算的第一性原理密度泛函和多体微扰理论。两种不同的机制进行检查-带间和带内复合-影响不同部分的发射光谱。在室温下,从蓝到绿的光谱范围内,俄歇系数可以达到2 × 10 ^-30 cm ^6 s ^-1;在红外线范围内,俄歇系数甚至更大。由于俄歇复合与自由载流子浓度的立方幂成比例,因此它在高电流密度下成为重要的非辐射损耗机制。我们的研究结果表明,俄歇复合可能是负责量子效率的损失,影响InGaN基发光体。

英文摘要:

We report Auger recombination rates for wurtzite InGaN calculated from first principles density-functional and many-body-perturbation theory. Two different mechanisms are examined -- inter- and intra-band recombination -- that affect different parts of the emission spectrum. In the blue to green spectral region and at room temperature the Auger coefficient can be as large as 2x10^-30cm^6s^-1; in the infrared even larger. Since Auger recombination scales with the cubic power of the free-carrier concentration it becomes an important non-radiative loss mechanism at high current densities. Our results indicate that Auger recombination may be responsible for the loss of quantum efficiency that affects InGaN-based light emitters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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