Carrier injection and recombination processes in perovskite CH3NH3PbI3 solar cells studied by electroluminescence spectroscopy

Taketo Handa, Makoto Okano, David M. Tex, Ai Shimazaki, Tomoko Aharen, Atsushi Wakamiya, Yoshihiko Kanemitsu

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトルOrganic Photonic Materials and Devices XVIII
出版社SPIE
9745
ISBN(電子版)9781628419801
DOI
出版ステータスPublished - 2016
外部発表はい
イベントOrganic Photonic Materials and Devices XVIII - San Francisco, United States
継続期間: 2016 2 152016 2 17

Other

OtherOrganic Photonic Materials and Devices XVIII
CountryUnited States
CitySan Francisco
Period16/2/1516/2/17

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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