Solution-processed and self-powered photodetector in vertical architecture using mixed-halide perovskite for highly sensitive UVC detection. Issue 2 (23rd December 2020)

• Record Type: Journal Article
• Authors: Nguyen, Thi My Huyen; Kim, Sangmo; Bark, Chung Wung
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 2(2021)
• Page Start: 1269
• Page End: 1276
• Publication Date: 2020-12-23
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta08738f
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Self-powered and solution-processable halide perovskite-based photodetector exhibited an outstanding on/off photocurrent and superior stability under UVC illumination. 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 10 3, a good responsivity of 52.68 mA W −1, and a high detectivity of 4.65 × 10 11 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.