Determination of Chloride Content in Planar CH3NH3PbI3−xClx Solar Cells by Chemical Analysis

Methylammonium lead mixed-halide perovskite (CH3NH3PbI3−xClx) has been widely used for photovoltaic conversion. Supposedly, the presence of chloride ions in perovskite precursors enhances the coverage, morphology, and stability of the final perovskite film. It also improves carrier diffusion length...

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Bibliographic Details
Published in:Chemistry letters 2015, Vol.44 (8), p.1089-1091
Main Authors: Cojocaru, Ludmila, Uchida, Satoshi, Kumar Jena, Ajay, Miyasaka, Tsutomu, Nakazaki, Jotaro, Kubo, Takaya, Segawa, Hiroshi
Format: Article
Language:English
Subjects:
Chemical analysis
Chloride ions
Chlorides
Energy conversion efficiency
Perovskite Solar Cells
Perovskites
Photovoltaic cells
Photovoltaic conversion
Solar cells
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Summary:Methylammonium lead mixed-halide perovskite (CH3NH3PbI3−xClx) has been widely used for photovoltaic conversion. Supposedly, the presence of chloride ions in perovskite precursors enhances the coverage, morphology, and stability of the final perovskite film. It also improves carrier diffusion length in the perovskite film. Due to these advantages, the mixed-halide compound has been adopted for use in planar structure perovskite solar cells and it has led to significant enhancement in power conversion efficiency. However, until now, the exact content of chloride in the final product (CH3NH3PbI3−xClx) is under debate and has not been reported yet. In this article, we show the exact amount of chloride ions in the final perovskite film, determined by chemical analysis with ion chromatography.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.150385