Y2O3:Eu3+@SiO2 nanocomposites as a convertor for a broadband solar‐blind UV photodetector. Issue 8 (28th April 2022)

• Record Type: Journal Article
• Authors: Jia, Hong; Zhang, Xian; Feng, Zhenyi; Zhao, Xuefei; Zhu, Yibing; Fan, Yidan; Pan, Jinping; Ding, Chaoliang; Zhang, Zhiling; Xu, Xiaoyun; Cao, Yan
• Is Part Of: Journal of the American Ceramic Society. Volume 105:Issue 8(2022)
• Page Start: 5252
• Page End: 5261
• Publication Date: 2022-04-28
• Subjects: core shell structure -- electrophoretic deposition method -- rare‐earth ions -- solar‐blind UV photodetector -- down‐conversion; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.18501
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: Core–shell nanocomposites have attracted extensive attention in the photoelectric field because of their improved material properties and the combination of multiple functions. Particularly, these nanocomposites exhibit tunable structure and excellent optical properties. Inspired by these unique features, a novel optically active nanocomposites, Y2 O3 :Eu 3+ @SiO2 with a core–shell structure, is designed and fabricated by a hydrothermal method and electrophoretic deposition. In addition, the Y2 O3 :Eu 3+ @SiO2 composite film is also successfully developed and applied as a spectral down‐converter in the solar‐blind ultraviolet (UV) waveband region of 200–280 nm. Moreover, a broadband solar‐blind UV photodetector device is elaborated and a notable enhancement in the UV sensitivity is achieved. The findings not only provide a new idea for the development of broadband solar‐blind UV photodetector but also extended the application range of core–shell nanocomposites in photonics. Abstract : A broadband solar‐blind UV photodetector based on a Y2 O3 :Eu 3+ @SiO2 composite film is demonstrated. In our design, down‐conversion materials with a core–shell structure effectively convert UV light into visible light. This down‐converted visible light can ultimately be absorbed by Si‐APD to produce photocurrent, which is recorded by an oscilloscope. This study suggests a promising strategy for the utilization of rare‐earth‐doped luminescent materials in highly efficient broadband solar‐blind UV photodetectors.