Huang Zhenqiang, Tan Wenjiang, Ma Peipei, Yan Lihe, Si Jinhai, Hou Xun
Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Shannxi Key Laboratory of Information Photonic Technique, School of Electronic Science and Engineering, Xi'an Jiaotong University, 28 Xianning Road, Xi'an 710049, China.
Nanomaterials (Basel). 2023 Oct 4;13(19):2701. doi: 10.3390/nano13192701.
Lead halide perovskites (LHPs) have excellent semiconductor properties. They have been used in many applications such as solar cells. Recently, the hot carrier dynamics in this type of material have received much attention as they are useful for enhancing the performance of optoelectrical devices fabricated from it. Here, we study the ultrafast hot carrier dynamics of a single CsPbBr microplate using femtosecond Kerr-gated wide-field fluorescence spectroscopy. The transient photoluminescence spectra have been measured under a variety of excitation fluences. The temporal evolution of bandgap renormalization and the competition between hot carrier cooling and the recovery of the renormalized bandgap are clearly revealed.
卤化铅钙钛矿（LHPs）具有优异的半导体特性。它们已被应用于许多领域，如太阳能电池。最近，这类材料中的热载流子动力学受到了广泛关注，因为它们有助于提高由其制成的光电器件的性能。在此，我们使用飞秒克尔门控宽场荧光光谱研究了单个CsPbBr微板的超快热载流子动力学。在各种激发通量下测量了瞬态光致发光光谱。清晰地揭示了带隙重整化的时间演化以及热载流子冷却与重整化带隙恢复之间的竞争。
