Control of charge transport in the perovskite CH3 NH3 PbI3 thin film

Jiangjian Shi; Huiyun Wei; Songtao Lv; Xin Xu; Huijue Wu; Yanhong Luo; Dongmei Li; Qingbo Meng

doi:10.1002/cphc.201402815

Control of charge transport in the perovskite CH3 NH3 PbI3 thin film

Chemphyschem. 2015 Mar 16;16(4):842-7. doi: 10.1002/cphc.201402815. Epub 2015 Jan 9.

Authors

Jiangjian Shi¹, Huiyun Wei, Songtao Lv, Xin Xu, Huijue Wu, Yanhong Luo, Dongmei Li, Qingbo Meng

Affiliation

¹ Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (P. R. China).

PMID: 25581504
DOI: 10.1002/cphc.201402815

Abstract

Carrier density and transport properties in the CH3 NH3 PbI3 thin film have been investigated. It is found that the carrier density, the depletion field, and the charge collection and transport properties in the CH3 NH3 PbI3 absorber film can be controlled effectively by different concentrations of reactants. That is, the carrier properties and the self-doping characteristics in CH3 NH3 PbI3 films are strongly influenced by the reaction thermodynamic and kinetic processes. Furthermore, by employing mixed solvents with ethanol and isopropanol to deposit the CH3 NH3 PbI3 film, the charge collection and transport efficiencies are improved significantly, thereby yielding an overall enhanced cell performance.

Keywords: charge transport; kinetics; perovskite phases; solar cells; thermodynamics.