Study on Performance Improvements in Perovskite-Based Ultraviolet Sensors Prepared Using Toluene Antisolvent and CH3NH3Cl
- Authors
- Shin, Seong Gwan; Bark, Chung Wung; Choi, Hyung Wook
- Issue Date
- Apr-2021
- Publisher
- MDPI
- Keywords
- Antisolvent; Bandgap widening; CH3 NH3 Cl; CH3 NH3 PbBr3; Ultraviolet (UV) sensors
- Citation
- Nanomaterials, v.11, no.4
- Journal Title
- Nanomaterials
- Volume
- 11
- Number
- 4
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/80894
- DOI
- 10.3390/nano11041000
- ISSN
- 2079-4991
- Abstract
- In this study, a simply structured perovskite-based ultraviolet C (UVC) sensor was prepared using a one-step, low-temperature solution-processing coating method. The UVC sensor utilized CH3 NH3 PbBr3 perovskite as the light-absorbing layer. To improve the characteristics of CH3 NH3 PbBr3, an antisolvent process using toluene and the addition of CH3 NH3 Cl were introduced. The device with these modifications exhibited a response rise/fall time of 15.8/16.2 ms, mobility of 158.7 cm2 /V·s, responsivity of 4.57 mA/W, detectivity of 1.02 × 1013 Jones, and external quantum efficiency of 22.32% under the 254-nm UV illumination. Therefore, this methodology could be a good approach in facilitating UVC detection. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
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