Li Dechuan, Zhu Guangping
School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, China.
Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, Huaibei 235000, China.
Materials (Basel). 2022 Sep 5;15(17):6160. doi: 10.3390/ma15176160.
Highly efficient quantum cutting KY(CO):Tb phosphors excited by ultraviolet B (UVB) and ultraviolet C (UVC) were investigated. The structural and spectroscopic properties were characterized by XRD analysis and fluorescence spectrophotometry, respectively. The results showed that the monoclinic crystal structure of KY(CO):Tb remained in the Tb doping range of 0~100%. In the excitation spectrum, two intense excitation peaks were observed in the ultraviolet range. Under the excitation of 283 nm, the maximum quantum efficiency of KY(CO):0.7Tb could reach 119%. However, the most efficient quantum cutting occurred at the K excited state in the cross-relaxation of K + FD + D. The Tb content could be selected arbitrarily in the KY(CO) host without any concentration quenching. Optimal quantum cutting concentrations of Tb in KY(CO) were 0.7 and 0.3 for the excitation of UVB and UVC, respectively. UVB-excited phosphors are more popular with high transparency in products such as glass or resin. A quick response code was fabricated by resin to show the hidden information clearly. Therefore, the highly efficient phosphor could be a candidate material for the application in information identification technology.
研究了由紫外线B（UVB）和紫外线C（UVC）激发的高效量子切割KY(CO):Tb荧光粉。分别通过X射线衍射分析和荧光分光光度法对其结构和光谱性质进行了表征。结果表明，KY(CO):Tb的单斜晶体结构在0~100%的Tb掺杂范围内保持不变。在激发光谱中，在紫外范围内观察到两个强烈的激发峰。在283 nm激发下，KY(CO):0.7Tb的最大量子效率可达119%。然而，最有效的量子切割发生在K + FD + D的交叉弛豫过程中的K激发态。在KY(CO)基质中，Tb含量可任意选择，不存在任何浓度猝灭现象。对于UVB和UVC激发，KY(CO)中Tb的最佳量子切割浓度分别为0.7和0.3。UVB激发的荧光粉在玻璃或树脂等产品中具有较高的透明度，更受欢迎。用树脂制作了一个二维码，以清晰显示隐藏信息。因此，这种高效荧光粉有望成为信息识别技术应用的候选材料。
