Ultraviolet photodetector based on RbCu2I3 microwire. (2nd April 2023)

• Record Type: Journal Article
• Authors: An, Hong-Xiang; Qiao, Bao-Shi; Zhang, Zhi-Hong; Lian, Zhen-Dong; Wei, Zhipeng; Li, Xiao-Shuang; Zeng, Qing-Guang; Wang, Bo; Ng, Kar Wei; Wang, Shuang-Peng
• Is Part Of: Nanotechnology. Volume 34:Number 14(2023)
• Publication Date: 2023-04-02
• Subjects: lead-free perovskite -- RbCu2I3 -- ultraviolet -- photodetector -- microwire; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/acb0d4
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Copper-based halide perovskites have shown great potential in lighting and photodetection due to their excellent photoelectric properties, good stability and lead-free nature. However, as an important piece of copper-based perovskites, the synthesis and application of RbCu2 I3 have never been reported. Here, we demonstrate the synthesis of high-quality RbCu2 I3 microwires (MWs) by a fast-cooling hot saturated solution method. The prepared MWs exhibit an orthorhombic structure with a smooth surface. Optical measurements show the RbCu2 I3 MWs have a sharp ultraviolet absorption edge with 3.63 eV optical band gap and ultra-large stokes shift (300 nm) in photoluminescence. The subsequent photodetector based on a single RbCu2 I3 MW shows excellent ultraviolet detection performance. Under the 340 nm illumination, the device shows a specific detectivity of 5.0 × 10 9 Jones and a responsivity of 380 mA·W −1 . The synthesis method and physical properties of RbCu2 I3 could be a guide to the future optoelectronic application of the new material.