Solution-processed and self-powered photodetector in vertical architecture using mixed-halide perovskite for highly sensitive UVC detection
- Authors
- Nguyen, T.M.H.; Kim, Sangmo; Bark, Chung Wung
- Issue Date
- Jan-2021
- Publisher
- Royal Society of Chemistry
- Citation
- Journal of Materials Chemistry A, v.9, no.2, pp.1269 - 1276
- Journal Title
- Journal of Materials Chemistry A
- Volume
- 9
- Number
- 2
- Start Page
- 1269
- End Page
- 1276
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/79867
- DOI
- 10.1039/d0ta08738f
- ISSN
- 2050-7488
- Abstract
- In this study, a self-powered lead-halide perovskite-based deep-ultraviolet (UV) photodetector was prepared using a solution process. A heterojunction of mixed (FAPbI3)0.97(MAPbBr3)0.03 perovskite was utilized as the photo-absorber layer, and spiro-OMeTAD was utilized as the hole injection layer in a vertical structure. The device exhibited an outstanding on/off photocurrent ratio of more than 103, a good responsivity of 52.68 mA W-1, and a high detectivity of 4.65 × 1011 Jones under 254 nm UV illumination without an external bias. Moreover, the detector demonstrated superior stability while retaining a quick response speed after three weeks of storage in ambient air without encapsulation. Thus, the present study has developed a promising photodetector for several applications in the deep-UV region. © 2021 The Royal Society of Chemistry.
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