Recombination at high carrier density in methylammonium lead iodide studied using time-resolved microwave conductivity
Recombination at high carrier density in methylammonium lead iodide studied using time-resolved microwave conductivity
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DOI：
10.1063/1.4990802
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发表时间：
2017-08-14
影响因子：
3.2
通讯作者：
Chabinyc, Michael L.
中科院分区：
文献类型：
--
作者：
Labram, John G.;Chabinyc, Michael L.
时间分辨微波电导率（TRMC）是一种高度通用的方法，可以快速评估半导体化合物的电子性质，而无需构建和优化电子器件。在这份报告中，我们研究如何双分子和俄歇复合机制影响TRMC测量。特别是，我们研究如何重组减少的TRMC的品质因数的测量值：φ西格玛亩，在高入射光通量。使用一个数值模型，我们计算这些高阶复合过程如何减少实验测量值的φ Sigma μ相对于一个政权的低载流子浓度，几乎没有复合。通过拟合这个模型的混合卤化物钙钛矿化合物，甲基铵碘化铅实验获得的数据，我们能够提取的双分子和俄歇速率常数，并提供一个明确的确定这些薄膜的空穴和电子迁移率的总和。由AIP出版社出版。
Time-resolved microwave conductivity (TRMC) is a highly versatile method to rapidly evaluate the electronic properties of semiconducting compounds without the need to construct and optimize electronic devices. In this report, we study how bimolecular and Auger recombination mechanisms affect TRMC measurements. In particular, we investigate how recombination reduces the measured value of the TRMC figure-of-merit: phi Sigma mu, at a high incident optical fluence. Using a numerical model, we calculate how these higher-order recombination processes reduce experimentally measured values of phi Sigma mu relative to a regime of low carrier concentration with little recombination. By fitting this model to experimentally obtained data for the hybrid halide perovskite compound, methylammonium lead iodide, we are able to extract the bimolecular and Auger rate constants and provide a clear determination of the sum of the hole and electron mobilities for these films. Published by AIP Publishing.