High performance ultraviolet photodiode based on thin DPPT-TT donor-acceptor organic polymer

Liang, Haoqi and Cui, Jiupeng and Yu, Zhihao and Sun, Huabin and Wei, Heming and Zakaria, Rozalina and Li, Binhong and Wu, Jie and Xu, Yong and Tan, Chee Leong (2022) High performance ultraviolet photodiode based on thin DPPT-TT donor-acceptor organic polymer. APPLIED PHYSICS LETTERS, 121 (20). ISSN 1077-3118, DOI https://doi.org/10.1063/5.0123705.

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Official URL: https://doi.org/10.1063/5.0123705

Abstract

A high-performance ultraviolet photodetector based on a thin layer DPPT-TT organic material is experimentally demonstrated. The high absorption of DPPT-TT in the ultraviolet band is attributed to the foundation for a high-performance ultraviolet detector. The device's responsivity can be improved by adequately designing the hole-blocking layer HfO2 and the stepped structure at the bottom contact. Due to the self-filtering and optical trapping structure, the device achieves external quantum efficiency above 100%, even with a thin absorption layer (around 50 nm). The maximum spectral responsivity of the device is 383 A/W, and the corresponding maximum specific detection rate is about 2.79 x 10(12) at a bias voltage of 0.5 V. Our results advocate that the thin organic ultraviolet photodetector promises excellent potential in low-cost ultraviolet-visible light detection and imaging applications. Published under an exclusive license by AIP Publishing.

Item Type: Article
Funders: National Natural Science Foundation of China (NSFC) [52105369], National Natural Science Foundation of China (NSFC) [61974070], National Natural Science Foundation of China (NSFC) [20KJB460008], Natural Science Foundation of Jiangsu Province [BK20190725], NUPTSF [NY220066], Guangdong Province Research and Development in Key Fields from Guangdong Greater Bay Area Institute of Integrated Circuit and System 2021B0101280002, Guangzhou City Research and Development Program in Key Field [20210302001]
Uncontrolled Keywords: LAYER; PHOTODETECTOR; SEMICONDUCTOR
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre
Depositing User: Ms Koh Ai Peng
Date Deposited: 25 Oct 2024 08:24
Last Modified: 25 Oct 2024 08:24
URI: http://eprints.um.edu.my/id/eprint/46169

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