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Proceedings Paper

Carrier injection and recombination processes in perovskite CH3NH3PbI3 solar cells studied by electroluminescence spectroscopy
Author(s): Taketo Handa; Makoto Okano; David M. Tex; Ai Shimazaki; Tomoko Aharen; Atsushi Wakamiya; Yoshihiko Kanemitsu
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Paper Abstract

Organic-inorganic hybrid perovskite materials, CH3NH3PbX3 (X = I and Br), are considered as promising candidates for emerging thin-film photovoltaics. For practical implementation, the degradation mechanism and the carrier dynamics during operation have to be clarified. We investigated the degradation mechanism and the carrier injection and recombination processes in perovskite CH3NH3PbI3 solar cells using photoluminescence (PL) and electroluminescence (EL) imaging spectroscopies. By applying forward bias-voltage, an inhomogeneous distribution of the EL intensity was clearly observed from the CH3NH3PbI3 solar cells. By comparing the PL- and EL-images, we revealed that the spatial inhomogeneity of the EL intensity is a result of the inhomogeneous luminescence efficiency in the perovskite layer. An application of bias-voltage for several tens of minutes in air caused a decrease in the EL intensity and the conversion efficiency of the perovskite solar cells. The degradation mechanism of perovskite solar cells under bias-voltage in air is discussed.

Paper Details

Date Published: 24 February 2016
PDF: 7 pages
Proc. SPIE 9745, Organic Photonic Materials and Devices XVIII, 97451I (24 February 2016); doi: 10.1117/12.2212052
Show Author Affiliations
Taketo Handa, Kyoto Univ. (Japan)
Makoto Okano, Kyoto Univ. (Japan)
David M. Tex, Kyoto Univ. (Japan)
Ai Shimazaki, Kyoto Univ. (Japan)
Tomoko Aharen, Kyoto Univ. (Japan)
Atsushi Wakamiya, Kyoto Univ. (Japan)
Yoshihiko Kanemitsu, Kyoto Univ. (Japan)

Published in SPIE Proceedings Vol. 9745:
Organic Photonic Materials and Devices XVIII
Christopher E. Tabor; François Kajzar; Toshikuni Kaino; Yasuhiro Koike, Editor(s)

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