Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (2): 216-223.DOI: 10.11944/j.issn.1000-0518.2018.02.170106

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Effect of Ionic Liquid on the Performance of Perovskite Solar Cells

ZHAO Lipingab,WANG Zhena*(),DONG Xianduia*()   

  1. aPolymer Composites Engingeering Laboratory,Changchun Institute of Applied Chemistry,Chinese Acdemy of Sciences,Changchun 130022,China
    bUniversity of Chinese Acdemy of Sciences,Beijing 100049,China
  • Received:2017-04-12 Accepted:2017-07-03 Published:2018-02-01 Online:2018-01-29
  • Contact: WANG Zhen,DONG Xiandui
  • Supported by:
    Supported by the Science and Technology Support Project of Jiangsu Province(No.BE2014147)

Abstract:

Controling the morphology of the perovskite film is an effective way to improve the photoelectric conversion efficiency of the cells. In this work, 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl] imide(EMITFSI), 1-hexyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl] imide(HMITFSI) and 1-ethyl-3-methy-limidazolium bis(fluorosulfonyl) imide(EMIFSI) were prepared. Perovskite active layers were dealed with ionic liquid dispersed into the chlorobenzene solution, the morphology of the perovskite layer and the performance of perovskite solar cells were investigated. The results indicate that the fill factor of perovskite solar cells dealed with HMITFSI is enhanced from 0.71 to 0.74, and the photoelectric conversion efficiency is increased, and that the morphology of perovskite is also improved. However, the performance of perovskite solar cells dealed with EMITFSI and EMIFSI are declined. It is HMI cation that improves the morphology of perovskite.

Key words: ionic liquid, perovskite, soaking treatment, morphology