Covalent bonding strategy to enable non-volatile organic cation perovskite for highly stable and efficient solar cells

  • Kai Liu
  • , Saqib Rafique
  • , Stefania F. Musolino
  • , Zenghua Cai
  • , Fengcai Liu
  • , Xiaoguo Li
  • , Yongbo Yuan
  • , Qinye Bao
  • , Yingguo Yang
  • , Jiao Chu
  • , Xinxin Peng
  • , Cengao Nie
  • , Wei Yuan
  • , Sidi Zhang
  • , Jiao Wang
  • , Yiyi Pan
  • , Haijuan Zhang
  • , Xia Cai
  • , Zejiao Shi
  • , Chongyuan Li
  • Haoliang Wang, Liangliang Deng, Tianxiang Hu, Yaxin Wang, Yanyan Wang, Shiyou Chen, Lei Shi, Paola Ayala, Jeremy E. Wulff*, Anran Yu*, Yiqiang Zhan*
*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

The loss of organic components from perovskites has inevitably triggered a series of undesirable results, including ion migration, increased defects, and organic vapors, which severely limit the performance of perovskite solar cells (PSCs) and impede their progress toward commercial applications. To circumvent this issue, we report a novel covalent bonding strategy by employing bis-diazirine (BD) molecules to covalently bond organic cations of perovskites. Experimental and ab initio simulation results confirmed the efficacy of BD molecules to strongly immobilize the organic cations and eventually enhance the thermal, illumination, and electrical bias resistance properties of perovskites. Consequently, highly efficient (24.36% efficiency, certified 24.02%) and ultra-stable PSCs were realized, which retained 98.6% of their initial efficiency even after 1,000 h of operational tests.

Original languageEnglish
Pages (from-to)1033-1050
Number of pages18
JournalJoule
Volume7
Issue number5
DOIs
StatePublished - 17 May 2023

Keywords

  • bis-diazirine molecules
  • covalent bonding strategy
  • operational stability
  • organic cations

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