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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

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.

Original languageEnglish
Title of host publicationOrganic Photonic Materials and Devices XVIII
PublisherSPIE
Volume9745
ISBN (Electronic)9781628419801
DOIs
Publication statusPublished - 2016
Externally publishedYes
EventOrganic Photonic Materials and Devices XVIII - San Francisco, United States
Duration: 2016 Feb 152016 Feb 17

Other

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

Keywords

  • degradation
  • electroluminescence
  • Organic-inorganic hybrid
  • perovskite solar cells
  • photoluminescence

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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    Handa, T., Okano, M., Tex, D. M., Shimazaki, A., Aharen, T., Wakamiya, A., & Kanemitsu, Y. (2016). Carrier injection and recombination processes in perovskite CH3NH3PbI3 solar cells studied by electroluminescence spectroscopy. In Organic Photonic Materials and Devices XVIII (Vol. 9745). [97451I] SPIE. https://doi.org/10.1117/12.2212052