摘要
研究了熔制温度对铋离子掺杂钡铝硅酸盐玻璃发光性能的影响。当用紫外光和808 nm的激光二极管激发时,分别在425 nm和1330 nm附近观察到可见和宽带红外发光。可见荧光的发射强度随着熔制温度的升高逐渐下降,而红外发光强度随着熔制温度的升高先是增强然后减弱。对光致发光的机理进行了探讨。
The influence of melting temperature on the luminescence properties of bismuth-doped barium aluminosilicate glasses was studied. Bismuth-doped barium aluminosilicate glasses were prepared at various melting temperatures. Absorption spectra, visible luminescence, infrared luminescence and fluorescent lifetime of the infrared luminescence of the glass samples were measured. There were two absorption peaks, one strong peak is at about 320 nm, and the other is at about 450 nm. The absorbance increased with increasing melting temperature. Visible luminescence was observed at about 420 nm, 440 nm and 475 nm when excited by 380 nm ultraviolet light. The infrared luminescence was observed at about 1 330 nm when excited by 808 nm laser diode （LD）. The intensity of the visible luminescence decreased with increasing melting temperature, while the intensity of the infrared luminescence increased at first, and then decreased with a further increase of melting temperature. But the fluorescent lifetime of the infrared luminescence decreased at first, and then increased with a further increase of melting temperature. The broadband infrared luminescence originates from bismuth ions, but is not due to high valence state ion of bismuth as suggested by Fujimoto et al. We attribute the visible and infrared luminescence to Bi3＋ and Bi ~ , respectively. The melting temperature may greatly influence the broadband infrared luminescence of bismuth-doped glasses. It is necessary to choose best melting temperature for the preparation of bismuth-doped glasses.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2007年第5期699-704,共6页
Chinese Journal of Luminescence
基金
国家自然科学基金(50672087)
国家科技部"973"(2006CB806000b)资助项目
关键词
铋
铝硅酸盐玻璃
光致发光
bismuth
aluminosilicate glass
luminescence
