論文

査読有り
2017年8月

Photocarrier Recombination and Injection Dynamics in Long-Term Stable Lead-Free CH3NH3SnI3 Perovskite Thin Films and Solar Cells

JOURNAL OF PHYSICAL CHEMISTRY C
  • Taketo Handa
  • ,
  • Takumi Yamada
  • ,
  • Hirofumi Kubota
  • ,
  • Shogo Ise
  • ,
  • Yoshihiro Miyamoto
  • ,
  • Yoshihiko Kanemitsu

121
30
開始ページ
16158
終了ページ
16165
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.jpcc.7b06199
出版者・発行元
AMER CHEMICAL SOC

We investigated the near-band-edge optical responses and photocarrier dynamics of encapsulated long-term stable CH3NH3SnI3 (MASnI(3)) thin films and solar-cell devices. The MASnI(3) thin film prepared with SnF2 exhibited a bandgap of 1.25 eV, while the film without SnF2 had a significantly blueshifted absorption edge. On the contrary, the PL peak energies were not influenced by the addition of SnF2. These observations indicate that the blueshift of the absorption edge in the SnF2-free MASnI(3) sample is due to the Burstein-Moss shift induced by a significant unintentional hole doping. Furthermore, time resolved photoluminescence measurements revealed that by adding SnF2 the photocarrier lifetime of the film increased by one order of magnitude, which enables improved device performance of solar cells. We clarified that in the MASnI3 solar cells the short-circuit current stays significantly below the ideal value due to a large nonradiative recombination rate in the perovskite layer, resulting in a small photocarrier-injection efficiency into the charge-transport layers.

Web of Science ® 被引用回数 : 26

リンク情報
DOI
https://doi.org/10.1021/acs.jpcc.7b06199
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000407189400010&DestApp=WOS_CPL

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