Anisotropic carrier dynamics and laser-fabricated luminescent patterns on oriented single-crystal perovskite wafers

Chao Ge (), Yachao Li, Haiying Song (), Qiyuan Xie, Leilei Zhang, Xiaoran Ma, Junfeng Liu, Xiangjing Guo, Yinzhou Yan, Danmin Liu, Wenkai Zhang (), Shibing Liu and Yang Liu ()
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Chao Ge: Beijing University of Technology
Yachao Li: Beijing University of Technology
Haiying Song: Beijing University of Technology
Qiyuan Xie: Beijing University of Technology
Leilei Zhang: State Key Laboratory of NBC Protection for Civilian
Xiaoran Ma: Beijing University of Technology
Junfeng Liu: Beijing University of Technology
Xiangjing Guo: Beijing University of Technology
Yinzhou Yan: Beijing University of Technology
Danmin Liu: Beijing University of Technology
Wenkai Zhang: Beijing Normal University
Shibing Liu: Beijing University of Technology
Yang Liu: Shandong University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Perovskite materials and their applications in optoelectronics have attracted intensive attentions in recent years. However, in-depth understanding about their anisotropic behavior in ultrafast carrier dynamics is still lacking. Here we explore the ultrafast dynamical evolution of photo-excited carriers and photoluminescence based on differently-oriented MAPbBr3 wafers. The distinct in-plane polarization of carrier relaxation dynamics of the (100), (110) and (111) wafers and their out-of-plane anisotropy in a picosecond time scale were found by femtosecond time- and polarization-resolved transient transmission measurements, indicating the relaxation process dominated by optical/acoustic phonon interaction is related to photoinduced transient structure rearrangements. Femtosecond laser two-photon fabricated patterns exhibit three orders of magnitude enhancement of emission due to the formation of tentacle-like microstructures. Such a ultrafast dynamic study carried on differently-oriented crystal wafers is believed to provide a deep insight about the photophysical process of perovskites and to be helpful for developing polarization-sensitive and ultrafast-response optoelectronic devices.

Date: 2024
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DOI: 10.1038/s41467-024-45055-y

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