摘要
研究了铋离子掺杂磷铝酸盐玻璃近红外发光与光学碱度的反常现象.研究发现,通过改变碱金属离子半径调节玻璃基质光学碱度,在808 nm激光激发下铋离子位于1300 nm波段的近红外宽带发光强度随光学碱度的增大而增强,而在690 nm激光激发下得到的1100 nm波段近红外发光强度则随着光学碱度的增大而减弱.该玻璃1300 nm波段近红外发光强度与光学碱度依存关系与以往报道结果相反,且也与1100 nm波段发光特性相反.根据上述结果可以推测玻璃中1100和1300 nm波段的近红外发光源于不同价态的铋离子,而该玻璃体系的基质结构自还原作用是导致上述现象产生的主要原因.
The effect of optical basicity on near infrared（NIR） luminescence properties of bismuth-doped aluminophosphate glasses was investigated.The results show that with increase in the radius of alkali metal ions in glass host,the intensity of NIR emission band at about 1300 nm from Bi ions increases,while the intensity of NIR emission band at 1100 nm decreases.The dependence of intensity of NIR emission band at 1300 nm on the optical basicity of glass host is found to be opposite to those in previous reports as well as to that of NIR emission band at 1100 nm.The infrared emissions peaked at 1100 and 1300 nm may originate from different valent Bi ion,and the relationship between optical basicity and infrared luminescence of bismuth-doped aluminophosphate glasses can be due to the reduction effect of glass matrix.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第6期615-619,共5页
Journal of Inorganic Materials
基金
973计划(2011CB211700)
云南省自然科学基金(2009CC009
2008027E)~~
关键词
铋掺杂
近红外
超宽带
光学碱度
玻璃
bismuth doped
infrared fluorescence
optical basicity
glass
