各向异性
薄脆饼
发光
材料科学
钙钛矿(结构)
激光器
光电子学
Crystal(编程语言)
动力学(音乐)
化学物理
纳米技术
光学
结晶学
化学
物理
计算机科学
程序设计语言
声学
作者
Chao Ge,Yachao Li,Haiying Song,Qiyuan Xie,Leilei Zhang,Xiaoran Ma,Junfeng Liu,Xiangjing Guo,Yinzhou Yan,Danmin Liu,Wenkai Zhang,Shibing Liu,Yang Liu
标识
DOI:10.1038/s41467-024-45055-y
摘要
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 MAPbBr 3 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.
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