Modulating crystal grain size and optoelectronic properties of perovskite films for solar cells by reaction temperature

Xiaodong Ren, Zhou Yang, Dong Yang, Xu Zhang, Dong Cui, Yucheng Liu, Qingbo Wei, Haibo Fan, Shengzhong Frank Liu

Research output: Contribution to journalArticlepeer-review

113 Scopus citations

Abstract

Regulating the temperature during the direction contact and intercalation process (DCIP) for the transition from PbI2 to CH3NH3PbI3 modulated the crystallinity, crystal grain size and crystal grain orientation of the perovskite films. Higher temperatures produced perovskite films with better crystallinity, larger grain size, and better photovoltaic performance. The best cell, which had a PCE of 12.9%, was obtained on a film prepared at 200 °C. Further open circuit voltage decay and film resistance characterization revealed that the larger grain size contributed to longer carrier lifetime and smaller carrier transport resistance, both of which are beneficial for solar cell devices.

Original languageEnglish (US)
Pages (from-to)3816-3822
Number of pages7
JournalNanoscale
Volume8
Issue number6
DOIs
StatePublished - Feb 14 2016

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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