期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 918, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.165502
关键词
Ultraviolet C; SnO2 quantum dot; Poly(9-vinyl carbazole); Self-power; Solution process
资金
- Korea Basic Science Institute (National Research Facilities and Equipment Center) - Ministry of Education [2019R1A6C1010016]
- National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2020R1A2C1101647]
In this study, a self-powered high-performance UVC photodetector was developed using a solution-processed PN heterojunction. The selective absorption of UVC wavelength range was achieved through quantum confinement. The optimized device exhibited remarkable responsivity, detectivity, UVC rejection ratio, and stability.
Ultraviolet C (UVC) photodetectors have attracted significant attention recently owing to the importance of UVC detection for preventing human skin damage, monitoring environmental conditions, detecting power facility aging, and military applications. The solar-blindness of UVC detectors ensures low noise levels, benefiting from lower interference than other environmental signals. In this study, a solution-processed PN heterojunction consisting of P-type polymer (poly(9-vinyl carbazole) (PVK)) and N-type metal oxide quantum dots (SnO2 QDs) was used to develop a self-powered high-performance UVC photodetector. Reducing the size of the SnO2 QDs significantly enhanced the selective absorption of the UVC wavelength range via quantum confinement. The device architecture and constituent film thickness were carefully controlled to enhance the performance of the PVK/SnO2 QD UVC photodetector. Under the optimized conditions, the device exhibited remarkable responsivity (49.6 mA W-1 at 254 nm and 166 mA W-1 at 220 nm), detectivity (2.16 x 10(10) Jones at 254 nm), UVC ultraviolet A (UVA) rejection ratio (R-254 nm/R-365 nm and R-220 nm/R-365 nm of similar to 260 and 880, respectively), and stability over long-term self-powered on/off operations. Our solar-blind UVC photodetector can be used to inexpensively, simply, and precisely monitor hazardous UVC light in various applications. (C) 2022 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据