荧光粉
材料科学
兴奋剂
光子上转换
结晶度
光电子学
复合数
红外线的
离子
分析化学(期刊)
光学
化学
物理
复合材料
有机化学
色谱法
作者
Hong Jia,Hongming Jiang,Zhi Chen,Zhenyi Feng,Xian Zhang,Yuping Zhang,Xiaoyun Xu,Xue Li,Feng Peng,Xiaofeng Liu,Jianrong Qiu
标识
DOI:10.1021/acs.jpclett.2c00713
摘要
We demonstrate Li+-doping engineering for improving the near-infrared (NIR) photoresponse in an Er3+-activated Y2O3 phosphor. We show that the rational incorporation of Li+ results in a large enhancement of the upconversion (UC) emission intensity up to 29 times upon excitation of NIR light. The improved UC properties could be associated with the enhanced dipole-dipole transition probability due to Li+-induced changes in the local site symmetry for Er3+ ions and improvement in the crystallinity of the samples. We further demonstrate the construction of UC phosphor/polymer composite films by attaching the UC phosphor/polymer composite film onto a Si-photoresistor. The device shows a large enhancement of the photovoltage response from 0.16 to 0.4 V in Li-doped samples under NIR light illumination. These results suggest an effective doping strategy for the improvement of the UC performance of the oxide phosphor and its wide applications in solar energy utilization and NIR response devices.
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