Relationship between perovsktie solar cell efficiency and lattice disordering

Daisuke Hirotani, Kohei Nishimura, Kengo Hamada, Muhammad Akmal Kamarudin, Satoshi Iikubo, Qing Shen, Taro Toyoda, Shuzi Hayase

Research output: Contribution to journalArticlepeer-review

Abstract

Multi-cations lead perovskite solar cells have shown higher performance than single-cation perovskite solar cells. This compositional engineering of perovskite material retains the optimum tolerance factor while allowing the tuning of the band gap in addition to the enhanced stability of cubic phase perovskite. However, no in-depth explanation has been provided on the relationship between crystal structure of the perovskite and the solar cell efficiency. In this report, we investigate the effect of lattice disordering of FAxMA1xPbI3 perovskite on the tolerance factor and solar cell efficiency. The lattice disordering estimated using Williamson-Hall plot of XRD analysis revealed that the disordering is lowest when x = 0.2 and highest when x = 1.0. Correspondingly, x = 0.2 showed the highest solar cell performance and long carrier lifetime Our results show that the disordering in α phase of FAxMA1xPbI3 layer causes lattice deformation which affects the carrier lifetime and solar cell efficiency, instead of the defects on constituent elements.

Original languageEnglish
Article number035001
JournalJapanese journal of applied physics
Volume60
Issue number3
DOIs
Publication statusPublished - Mar 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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