【作者】 厉旭杰； 聂秋华； 金珍娟； 陈燕飞； 吴怡； 王俊；

【Author】 Li Xu-Jie~(1,2) Nie Qiu-Hua~(1,2) Jin Zhen-Juan~(1,2) Chen Yan-Fei~(1,2) Wu Yi~(1,2) Wang Jun~(1,2) 1(College of Information Science and Engineering,Ningbo University,Ningbo 315211,China) 2(The State Key Laboratory Base of Novel Functional Materials and Preparation Science,Ningbo 315211,China)

【机构】 宁波大学信息科学与工程学院； 宁波市新型功能材料及其制备科学实验室——省部共建国家重点实验室培育基地；

【摘要】 制备了Er³⁺单掺的31Bi₂O₃-59GeO₂-10Na₂O-xEr₂O₃（x=0.1,0.3,0.5,0.7,1.0,1.5）玻璃,研究了玻璃吸收光谱和975 nm泵浦下上转换发光光谱,分析了上转换发光机制。结果表明,。随着Er₂O₃浓度的增加,绿光（524nm、546nm）和红光（657nm）的发光强度都会逐渐增强,当Er₂O₃浓度达到1.0mol%时,发光强度达到最大值,继续增加Er₂O₃浓度,发光强度反而会减小。基于Er³⁺的能级图及上转换机制建立了速率方程,通过数值求解速率方程拟合实验测量寿命曲线,得出了Er³⁺之间的能量转移系数为C₂₂=3.64×10^-17cm³/s,C₃₃=2.74×10^-17cm³/s。更多还原

【Abstract】 Er³⁺-doped 31Bi₂O₃-59GeO₂-10Na₂O-xEr₂O₃（x=0.1,0.3,0.5,0.7,1.0,1.5） glasses are prepared.Absorption spectra and upconversion luminescence spectra under 975nm excitation are studied,and upconversion luminescence mechanisms are analyzed.The result shows that the upconversion intensity drastically increases and has a maximum around 1.0 mol%Er₂O₃ and decreases with an increase of the Er₂O₃ content.Rate equations based on energy levels of Er³⁺,and upconversion mechanisms are developed,By calculating the rate equation to fit the measured fluorescence decay,coefficients of the energy transfer rate are C₂₂=3.64×10^-17cm³/s,C₃₃=2.74×10^-17cm³/s.更多还原