White phosphors from a silicate-carboxylate sol-gel precursor that lack metal activator ions
White phosphors from a silicate-carboxylate sol-gel precursor that lack metal activator ions
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DOI：
10.1126/science.276.5320.1826
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发表时间：
1997-06-20
期刊：
影响因子：
56.9
通讯作者：
Sailor, MJ
中科院分区：
文献类型：
--
作者：
Green, WH;Le, KP;Sailor, MJ
高发射率（在365纳米激发波长下的外量子产率超过35%）宽带磷光体可以由四烷氧基硅烷溶胶-凝胶前体和各种有机羧酸合成。空气稳定的磷光体在低温（低于300摄氏度）下合成，并显示出宽的可见光致发光光谱，肉眼看起来是白色。用3-氨丙基三乙氧基硅烷取代四烷氧基硅烷可制备水溶性荧光粉。这些材料是不含活化剂金属离子的最有效的非本征磷光体。
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.