期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 9, 期 19, 页码 5710-5717出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.8b02245
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资金
- U.S. Department of Energy (DOE) [DE-AC36-08GO28308]
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences, Biosciences, and Geosciences
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.
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