Laser‐Induced Recoverable Fluorescence Quenching of Perovskite Films at a Microscopic Grain Scale. Issue 4 (9th January 2022)

• Record Type: Journal Article
• Authors: Xiang, Yuren; Cao, Yameng; Yang, Wenqiang; Hu, Rui; Wood, Sebastian; Li, Bowei; Hu, Qin; Zhang, Fan; He, Jujie; Yavari, Mozhgan; Zhao, Jinlai; Zhao, Yunlong; Song, Jun; Qu, Junle; Zhu, Rui; Russell, Thomas P.; Silva, S. Ravi P.; Zhang, Wei
• Is Part Of: Energy & environmental materials. Volume 5:Issue 4(2022)
• Page Start: 1189
• Page End: 1199
• Publication Date: 2022-01-09
• Subjects: fluorescence quenching -- perovskite -- photophysics -- stability; Power resources -- Environmental aspects -- Periodicals; Renewable energy sources -- Periodicals; Environmental engineering -- Periodicals; 333.79
• DOI: 10.1002/eem2.12231
• Languages: English
• ISSNs: 2575-0356

Abstract

Abstract : Understanding the fundamental properties of metal‐halide perovskite materials is driving the development of novel optoelectronic applications. Here, we report the observation of a recoverable laser‐induced fluorescence quenching phenomenon in perovskite films with a microscopic grain‐scale restriction, accompanied by spectral variations. This fluorescence quenching depends on the laser intensity and the dwell time under Auger recombination dominated conditions. These features indicate that the perovskite lattice deformation may take the main responsibility for the transient and show a new aspect to understand halide perovskite photo‐stability. We further modulate this phenomenon by adjusting the charge carrier recombination and extraction, revealing that efficient carrier transfer can improve the bleaching resistance of perovskite grains. Our results provide future opportunities to attain high‐performance devices by tuning the perovskite lattice disorder and harvesting the energetic carriers. Abstract : Here, we reported a recoverable fluorescence quenching phenomenon related to the lattice structural deformation at carrier densities dominated by the Auger recombination. Furthermore, we found that improving carrier extraction may be a possible approach to utilize the energetic carriers, considering the stability of halide perovskite under high excitation. Our results provide a pathway to study the soft nature of halide perovskites and a novel guideline to attain high‐performance perovskite optoelectronic devices.