Fig. 1.
(Color online) Schematic diagram of the preparation of CsPbBr3 nanowires. (a) Preparation process of nanowires. (b) Cross-sectional schematic diagram of the device during preparation.
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| Citation: |
Yapeng Tang, Bo’ao Xiao, Dingjun Wu, Hai Zhou. Multi-functional PbI2 enables self-driven perovskite nanowire photodetector with ultra-weak light detection ability[J]. Journal of Semiconductors, 2025, 46(5): 052801. doi: 10.1088/1674-4926/24110016
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Y P Tang, B A Xiao, D J Wu, and H Zhou, Multi-functional PbI2 enables self-driven perovskite nanowire photodetector with ultra-weak light detection ability[J]. J. Semicond., 2025, 46(5), 052801 doi: 10.1088/1674-4926/24110016
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Multi-functional PbI2 enables self-driven perovskite nanowire photodetector with ultra-weak light detection ability
DOI: 10.1088/1674-4926/24110016
CSTR: 32376.14.1674-4926.24110016
More Information-
Yapeng Tang is a senior student majoring in integrated circuits at the International School of Microelectronics, Dongguan University of Technology. His research focuses on perovskite photodetectors -
Bo’ao Xiao graduated with a master's degree from Hubei University in 2024. His research focuses on perovskite nanowire photodetectors -
Hai Zhou is a Distinguished Professor at the International School of Microelectronics, Dongguan University of Technology. He received his PhD degrees from Wuhan University in 2012. In 2017, he joined Yanfa Yan Group in University of Toledo as a visiting scholar. His research focuses on opto-electronic devices based on perovskites - Corresponding author: hizhou@dgut.edu.cn
- Revised Date: 2024-11-24 Available Online: 2024-12-11
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Abstract
High-performance perovskite photodetectors with self-driven characteristic usually need electron/hole transport layers to extract carriers. However, these devices with transport layer structure are prone to result in a poor perovskite/transport layer interface, which restricts the performance and stability of the device. To solve this problem, this work reports a novel device structure in which perovskite nanowires are in-situ prepared on PbI2, which serves as both a reaction raw material and efficient carrier extraction layer. By optimizing the thickness of PbI2, nanowire growth time, and ion exchange time, a self-driven photodetector with an ITO/PbI2/CsPbBr3/carbon structure is constructed. The optimized device achieves excellent performance with the responsivity of 0.33 A/W, the detectivity of as high as 3.52 × 1013 Jones. Furthermore, the device can detect the light with its optical power lowered to 0.1 nW/cm2. This research provides a new method for preparing perovskite nano/micro devices with simple structure but excellent performance.-
Keywords:
- nanowire,
- PbI2,
- perovskite,
- photodetector
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References
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§These authors contribute equally to this work
