Direct Measurements of Carrier Transport in Polycrystalline Methylammonium Lead Iodide Perovskite Films with Transient Grating Spectroscopy

被引：26

作者：

Arias, Dylan H. ^{[1
]}

Moore, David T. ^{[1
]}

van de Lagemaat, Jao ^{[1
]}

Johnson, Justin C. ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, 15013 Denver West Pkwy, Golden, CO 80401 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2018年 / 9卷 / 19期

关键词：

EXCITON BINDING-ENERGY; GRAIN-BOUNDARIES; DIFFUSION LENGTHS; CRYSTALLIZATION; RECOMBINATION; DYNAMICS; LAYERS; SIZE;

D O I：

10.1021/acs.jpclett.8b02245

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hybrid organic-inorganic halide perovskites have been proposed in many optoelectronic applications, but critical to their increasing functionality and utility is understanding and controlling carrier transport. Here, we use light-induced transient grating spectroscopy to probe directly carrier transport in polycrystalline methylammonium lead iodide perovskite thin films using a weakly perturbative and noncontact method. The data reveal intrinsic diffusion characteristics of the charge carriers in the material and agree well with a simulated model of charge transport in which grain boundaries act as barriers to carrier movement.

引用

页码：5710 / 5717

页数：15

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