Near-Infrared Light-Induced Photoresponse in Er3+/Li+-Codoped Y2O3/Poly(methyl methacrylate) Composite Film

• DOI: 10.1021/acs.jpclett.2c00713
• Publication Date: 2022-04-13T15:02:05Z
• Authors: Hong Jia; Hongming Jiang; Zhi Chen; Zhenyi Feng; Xian Zhang; Yuping Zhang; Xiaoyun Xu; Xue Li; Feng Peng; Xiaofeng Liu; Jianrong Qiu
• Keywords: 01 natural sciences; 0104 chemical sciences

We demonstrate Li+-doping engineering for improving the near-infrared (NIR) photoresponse in an Er3+-activated Y2O3 phosphor. show that rational incorporation of Li+ results a large enhancement upconversion (UC) emission intensity up to 29 times upon excitation NIR light. The improved UC properties could be associated with enhanced dipole–dipole transition probability due Li+-induced changes local site symmetry Er3+ ions and improvement crystallinity samples. further construction phosphor/polymer composite films by attaching film onto Si-photoresistor. device shows photovoltage response from 0.16 0.4 V Li-doped samples under light illumination. These suggest effective doping strategy performance oxide phosphor its wide applications solar energy utilization devices.