A high-performance UV photodetector with superior responsivity enabled by a synergistic photo/thermal enhancement of localized surface plasmon resonance

Luxia Zheng, Yang Yang, Chris R. Bowen, Lan Jiang, Zhan Shu, Yun He, Hongli Yang, Zongzhuo Xie, Taixu Lu, Feng Hu, Weiyou Yang

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Abstract

In this paper, we propose a new strategy to enhance the photoelectric performance of ultraviolet (UV) photodetectors by exploiting a synergistic photo-thermal effect which is induced by a localized surface plasmon resonance. We demonstrate that a W18O49 plasmonic semiconductor is able to improve the performance of target photodetectors as a result of a localized surface plasmon resonance, which increases light absorption, enhances the photothermal effect to deliver an increased photocurrent, and provides photo-induced “hot electrons” to limit carrier depletion over prolonged light illumination. Consequently, a UV photodetector based on W18O49/TiO2 nanofibers is shown to exhibit an excellent photodetection performance with a high responsivity of up to 1.6 × 104 A W−1, which is five times greater than that of the pure TiO2 analogue and greatly exceeds those of the TiO2-based photodetectors reported to date.

Original languageEnglish
Pages (from-to)6227-6238
Number of pages12
JournalJournal of Materials Chemistry C
Volume11
Issue number18
Early online date12 Apr 2023
DOIs
Publication statusPublished - 14 May 2023

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (NSFC, Grant No. 62205165) and the College Students Science and Technology Innovation Activity Plan of Zhejiang Province (Grant No. 2022R428A009).

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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