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

页码：1826 / 1828

页数：3

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