Visualization of Hot Carrier Dynamics in a Single CsPbBr<sub>3</sub> Perovskite Microplate Using Femtosecond Kerr-Gated Wide-Field Fluorescence Spectroscopy
Zhenqiang Huang,
Wenjiang Tan,
Peipei Ma,
Lihe Yan,
Jinhai Si,
Xun Hou
Affiliations
Zhenqiang Huang
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
Wenjiang Tan
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
Peipei Ma
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
Lihe Yan
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
Jinhai Si
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
Xun Hou
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
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 CsPbBr3 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.
