journal article·2023-07-25

Ultrafast Carrier Drift Transport Dynamics in CsPbI3 Perovskite Nanocrystalline Thin Films

Kanishka Kobbekaduwa, Exian Liu, Qian Zhao, Jasjit Singh Bains, Jianbing Zhang, Ying Shi, Haimei Zheng, Dawen Li, Tong Cai, Ou Chen, Apparao M. Rao, Matthew C. Beard, Joseph M. Luther, Jianbo Gao

ACS Nano· Volume 17· Issue 14
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Abstract

We study the early time carrier drift dynamics in CsPbI 3 nanocrystal thin films with a sub 25 ps time resolution. Prior to trapping, carriers exhibit band-like transport characteristics, which is similar to those of traditional semiconductor solar absorbers including Si and GaAs due to optical phonon and carrier scattering at high temperatures. In contrast to the popular polaron scattering mechanism, the CsPbI 3 nanocrystal thin film demonstrates the strongest optical phonon scattering mechanism among other inorganic–organic hybrid perovskites, Si, and GaAs. This ultrafast dynamics study establishes a foundation for understanding the fundamental carrier drift properties that drive perovskite nanocrystal optoelectronics.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, United States

Chemistry & Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States

School of Materials Science and Engineering, Nankai University, Tianjin 300350, People’s Republic of China

Department of Chemistry, Yousef Haj-Ahmad Department of Engineering, Brock University, 1812 Sir Isaac Way, St Catharines, Ontario L2S 3A1, Canada

School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China

Institute of Atomic and Molecular Physics, Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, People’s Republic of China

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States

Department of Electrical and Computer Engineering, Center for Materials for Information Technology, The University of Alabama, Tuscaloosa, Alabama 35487, United States

Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States

Funding

Basic Energy Sciences · China Scholarship Council · National Natural Science Foundation of China

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