DataVXACS NanoPaper
journal article·2025-07-08

Acceleration of Carrier Transport in an Individual Microplate of Mixed-Halide Perovskite after Phase Segregation

Si Li, Yang Xiao, Fengrui Hu, Minxue Yang, Encheng Sun, Yuhong Shi, Zhixing Gan, Chunfeng Zhang, Bihu Lv, Yan Lv, Wei Chen, Min Xiao, Xiaoyong Wang

ACS Nano· Volume 19· Issue 26
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Source abstract

Abstract

The band gap energy of lead mixed bromide-iodide perovskite can be simply tuned by adjusting the ratio between the composing halide anions, which would be segregated again upon continuous light illumination to form the iodide-rich domains. Here, we have employed transient absorption microscopy to investigate the carrier diffusion dynamics in an individual CsPbBr 1.5 I 1.5 microplate under the influence of such iodide-rich domains. As expected in the phase-segregated microplate, the lifetime of charge carriers is shortened owing to their migration into the iodide-rich domains with a low band gap energy. Surprisingly, the diffusion coefficient of charge carriers is significantly increased in the phase-segregated microplate, signifying their effective acceleration by the iodide-rich domains according to our Green’s function simulations. The above findings have advanced the understanding of the carrier diffusion dynamics in mixed-halide perovskites, which would facilitate their potential applications in various optoelectronic devices such as solar cells and photodetectors.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

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

National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures

Nanjing University

College of Engineering and Applied Sciences, and MOE Key Laboratory of Intelligent Optical Sensing and Manipulation

School of Physics and Technology

Nanjing Normal University

Department of Scientific Facilities Development and Management

Zhejiang Lab

School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Key Laboratory of Flexible Electronics, and Jiangsu National Synergetic Innovation Center for Advanced Materials

Nanjing Tech University

Funding

National Key Research and Development Program of China · Natural Science Foundation of Jiangsu Province · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions

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