Interfacial Chemistry Triggers Ultrafast Radiative Recombination in Metal Halide Perovskites

Haiyun Dong, Chunhuan Zhang, Weijie Nie, Shengkai Duan, Christian N. Saggau, Min Tang, Minshen Zhu, Yong Sheng Zhao*, Libo Ma*, Oliver G. Schmidt*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Efficient radiative recombination is essential for perovskite luminescence, but the intrinsic radiative recombination rate as a basic material property is challenging to tailor. Here we report an interfacial chemistry strategy to dramatically increase the radiative recombination rate of perovskites. By coating aluminum oxide on the lead halide perovskite, lead–oxygen bonds are formed at the perovskite-oxide interface, producing the perovskite surface states with a large exciton binding energy and a high localized density of electronic state. The oxide-bonded perovskite exhibits a ≈500 fold enhanced photoluminescence with a ≈10 fold reduced lifetime, indicating an unprecedented ≈5000 fold increase in the radiative recombination rate. The enormously enhanced radiative recombination promises to significantly promote the perovskite optoelectronic performance.

Original languageEnglish
Article numbere202115875
JournalAngewandte Chemie - International Edition
Volume61
Issue number13
DOIs
Publication statusPublished - 21 Mar 2022
Externally publishedYes

Keywords

  • Amplified Spontaneous Emission
  • Interfacial Chemistry
  • Luminescence
  • Metal Halide Perovskite
  • Radiative Recombination

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