White phosphors from a silicate-carboxylate sol-gel precursor that lack metal activator ions

被引：351
|
作者：
Green, WH [1 ]
Le, KP [1 ]
Grey, J [1 ]
Au, TT [1 ]
Sailor, MJ [1 ]
机构：
[1] UNIV CALIF SAN DIEGO,DEPT CHEM & BIOCHEM,LA JOLLA,CA 92093
来源：
SCIENCE | 1997年 / 276卷 / 5320期
关键词：
D O I：
10.1126/science.276.5320.1826
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Highly emissive (with an external quantum yield exceeding 35 percent at a 365-nanometer excitation wavelength) broadband phosphors can be synthesized from a tetraalkoxysilane sol-gel precursor and a variety of organic carboxylic acids. The air-stable phosphors were synthesized at low temperatures (less than 300 degrees C) and displayed broad visible photoluminescence spectra that appeared white to the eye. Water-soluble phosphors can be prepared by the substitution of 3-aminopropyltriethoxysilane for tetraalkoxysilane in the synthesis. These materials are the most efficient extrinsic phosphors that do not contain activator metal ions.
引用
收藏
页码：1826 / 1828
页数：3
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