【摘要】 稀土离子掺杂碲酸盐系统玻璃是一类应用前景良好的上转换发光材料。研究了含铒TeO2-Nb2O5-ZnO系统玻璃在980nm抽运下的上转换光谱,结果发现存在3个上转换荧光谱带,分别对应于2H11/2→4I15/24、S3/2→4I15/2和4F9/2→4I15/2,而且Er3+含量的增加可明显提高材料在530、550和660nm附近的发光性能。少量的ZnO引入既可以大幅提升材料的上转换发光强度,又能保持铌碲酸盐玻璃良好的化学稳定性。材料的发光机制主要是激发态吸收(ESA)和能量转移(ET),最大声子能量的降低是上转换发光增强的主要原因。更多还原

【Abstract】 Rare earth ions doped tellurite glasses are kinds of upconversion fluorescence materials which have good application prospect.In this paper,the upconversion luminescence of Er3+-doped TeO2-Nb2O5-ZnO glasses with 980nm LD was studied,three kinds of upconversion fluorescence bands were found which corresponded to 2H11/2→4I15/2,4S3/2→4I15/2 and 4F9/2→4I15/2.The emission intensities near 530,550 and 660nm were increased with increasing Er3+ content of the glass.The introduction of a small amount of ZnO could substantially improve the upconversion luminous intensity,while still keeping good chemical stability of niobium tellurite glasses.The upconversion mechanisms mainly were belong to excited state absorption and energy transfer,and the decline of top phonon density was the main reason of the increase of upconversion fluorescence.更多还原