荧光粉
材料科学
兴奋剂
持续发光
发光
紫外线
光电子学
分析化学(期刊)
发射光谱
热释光
化学
色谱法
作者
Junpeng Shi,Xia Sun,Shenghui Zheng,Xin Fu,Yi Yang,Jiani Wang,Hongwu Zhang
标识
DOI:10.1002/adom.201900526
摘要
Abstract Here, a novel super‐long, ultraviolet A region (UVA), persistent luminescent (PerL) material, LiYGeO 4 :Bi 3+ , is developed. After irradiation at 254 nm for 10 min, the UVA PerL of LiYGeO 4 :Bi 3+ can persist for more than 300 h. In addition, the LiYGeO 4 :Bi 3+ also possesses a strong UVA emission with a power density of 11.83 mW m −2 at 10 s after the removal of the excitation source. Even after 72 h, the UVA PerL emission spectrum can still be clearly detected, which is the same as the photoluminescence emission spectrum and originated from the Bi 3+ emitting centers. Furthermore, LiYGeO 4 :Bi 3+ also exhibits a photostimulated PerL property, which can be easily activated with a red light emitting diode (LED) or NIR laser irradiation after the long‐term decay. Combining the results of the PerL excitation, absorption, and thermoluminescence spectra, the excellent UVA PerL of LiYGeO 4 :Bi 3+ can be ascribed to the existence of abundant trap sites created by the loss of Li + . This excellent PerL material can make up for deficiency of PerL materials in the UVA region and greatly expand the application of PerL materials in the biomedical, energy, environmental, and catalysis fields.
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