Study on a Mixed-Cation Halide Perovskite-Based Deep-Ultraviolet Photodetectoropen access
- Authors
- Choi, Ga In; Bark, Chung Wung; Choi, Hyung Wook
- Issue Date
- Feb-2023
- Publisher
- MDPI
- Keywords
- mixed-cation; halide perovskite; perovskite thin film; UVC sensor; photodetector
- Citation
- COATINGS, v.13, no.2
- Journal Title
- COATINGS
- Volume
- 13
- Number
- 2
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/87849
- DOI
- 10.3390/coatings13020248
- ISSN
- 2079-6412
- Abstract
- Deep-ultraviolet (UV) sensing has attracted significant interest because of its wide range of applications. A mixed-cation halide perovskite-based photodetector prepared by mixing CH3NH3PbX3 (X = I, Br, and Cl) and HC(NH2)PbX3 (X = I, Br, and Cl) exhibits high stability and excellent light absorption. In this study, perovskite was prepared by mixing CH3NH3+ (FA(+)) and HC(NH2)(2)(+) (MA(+)) cations using I-, Br-, and Cl- halide anions. The bandgaps of the prepared perovskites increased to 1.48, 2.25, and 2.90 eV with I-, Br-, and Cl-, respectively, and the light absorption spectra shifted to shorter wavelengths. An increase in the redshift of the light absorption led to an increase in the photocurrent. The FAPbCl(3)-MAPbCl(3)-based photodetector showed a high responsivity of 5.64 mA/W, a detectivity of 4.03 x 10(11), and an external quantum efficiency of 27.3%. The results suggested that the FAPbCl(3)-MAPbCl(3) perovskite is suitable for deep-UV light sensing and is an excellent candidate for the fabrication of a sensitive photodetector.
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