Sol-Gel Synthesis and Luminescent Characteristic of Doped Eu3+ Silicate-Silica Phosphor
来源期刊：JOURNAL OF RARE EARTHS2005年第5期
论文作者：Peng Xiudong Tang Jinfeng Zhou Pingle Yang Liangzhun Yang Shiping Yu Xibin
Key words：sol-gel chemistry; doped method; silicate phosphor; luminescence; rare earths;
Abstract: Eu-doped silicate complex gel nano-particles was obtained by sol-gel process and characterized with TEM, XRD, PL, etc. The well dispersed particles have particle size about 60～70 nm with specific surface area 98.3 m2·g-1. The complex gel phosphor gives a broad and strong luminescent emission originating from Eu2+ ions centered at 425 nm. The emission band shifts to shorter wavelengths with the increase of the ion radius of the alkali earth metals, but the band becomes red-shifted gradually with the increase of the ion radius of the alkali metals(except Li+). These divalent Eu2+ ions originate in inequivalent substitution of the alkaline earth ions. The presence of alkaline ions is favorable for the increasing emission intensity of the Eu2+ and lowering crystalline temperature of the silicate complex gel.
Peng Xiudong1，Tang Jinfeng1，Zhou Pingle1，Yang Liangzhun1，Yang Shiping1，Yu Xibin1
(1.Chemistry Department, Shanghai Normal University, Shanghai 200234, China)
Abstract:Eu-doped silicate complex gel nano-particles was obtained by sol-gel process and characterized with TEM, XRD, PL, etc. The well dispersed particles have particle size about 60～70 nm with specific surface area 98.3 m2·g-1. The complex gel phosphor gives a broad and strong luminescent emission originating from Eu2+ ions centered at 425 nm. The emission band shifts to shorter wavelengths with the increase of the ion radius of the alkali earth metals, but the band becomes red-shifted gradually with the increase of the ion radius of the alkali metals(except Li+). These divalent Eu2+ ions originate in inequivalent substitution of the alkaline earth ions. The presence of alkaline ions is favorable for the increasing emission intensity of the Eu2+ and lowering crystalline temperature of the silicate complex gel.
Key words:sol-gel chemistry; doped method; silicate phosphor; luminescence; rare earths;
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