論文

査読有り
2019年9月5日

Suppression of Charge Carrier Recombination in Lead-Free Tin Halide Perovskite via Lewis Base Post-treatment

The Journal of Physical Chemistry Letters
  • Muhammad Akmal Kamarudin
  • ,
  • Daisuke Hirotani
  • ,
  • Zhen Wang
  • ,
  • Kengo Hamada
  • ,
  • Kohei Nishimura
  • ,
  • Qing Shen
  • ,
  • Taro Toyoda
  • ,
  • Satoshi Iikubo
  • ,
  • Takashi Minemoto
  • ,
  • Kenji Yoshino
  • ,
  • Shuzi Hayase

10
17
開始ページ
5277
終了ページ
5283
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.jpclett.9b02024
出版者・発行元
American Chemical Society ({ACS})

Copyright © 2019 American Chemical Society. Lead-free tin perovskite solar cells (PSCs) show the most promise to replace the more toxic lead-based perovskite solar cells. However, the efficiency is significantly less than that of lead-based PSCs as a result of low open-circuit voltage. This is due to the tendency of Sn2+ to oxidize into Sn4+ in the presence of air together with the formation of defects and traps caused by the fast crystallization of tin perovskite materials. Here, post-treatment of the tin perovskite layer with edamine Lewis base to suppress the recombination reaction in tin halide PSCs results in efficiencies higher than 10%, which is the highest reported efficiency to date for pure tin halide PSCs. The X-ray photoelectron spectroscopy data suggest that the recombination reaction originates from the nonstoichiometric Sn:I ratio rather than the Sn4+:Sn2+ ratio. The amine group in edamine bonded the undercoordinated tin, passivating the dangling bonds and defects, resulting in suppressed charge carrier recombination.

リンク情報
DOI
https://doi.org/10.1021/acs.jpclett.9b02024
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85072538494&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85072538494&origin=inward
ID情報
  • DOI : 10.1021/acs.jpclett.9b02024
  • eISSN : 1948-7185
  • ORCIDのPut Code : 60965450
  • SCOPUS ID : 85072538494

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