Resonance-mediated dynamic modulation of perovskite crystallization for efficient and stable solar cells

Ligang Xu, Di Wu, Wenxuan Lv, Yuan Xiang, Yan Liu, Ye Tao, Jun Yin, Mengyuan Qian, Ping Li, Liuquan Zhang, Shufen Chen, Omar F. Mohammed, Osman Bakr, Zheng Duan, Runfeng Chen, Wei Huang

Research output: Contribution to journalArticlepeer-review

Abstract

Manipulating perovskite crystallization to prepare high-quality perovskite films is the key to achieve highly efficient and stable perovskite solar cells (PSCs). Here, we report a dynamic strategy to modulate perovskite crystallization using a resonance hole-transporting material (HTM) capable of fast self-adaptive tautomerization between multiple electronic states with neutral and charged resonance forms for mediating perovskite crystal growth and defects passivation in situ. This approach, based on resonance variation with self-adaptive molecular interactions between HTM and perovskite, produces high-quality perovskite films with smooth surface, oriented crystallization and low charge recombination, leading to high-performance inverted PSCs with power conversion efficiencies approaching to 22% for small-area devices (0.09 cm2) and up to 19.5% for large-area devices (1.02 cm2). Also, remarkably high stability of the PSCs was observed, retaining over 90%, 88%, or 83% of the initial efficiencies in air with relative humidity of 40∼50%, under continuous one-sun illumination, or at 75°C annealing for 1000 h without encapsulation.
Original languageEnglish (US)
Pages (from-to)2107111
JournalAdvanced Materials
DOIs
StatePublished - Nov 5 2021

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)
  • Mechanical Engineering

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