Optical Properties and X-ray Absorption Fine Structure Analysis of ZnS:Cu,Cl Thin-Film Phosphors
Optical Properties and X-ray Absorption Fine Structure Analysis of ZnS:Cu,Cl Thin-Film Phosphors
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ZnS:Cu,Cl薄膜荧光粉的光学性质和X射线吸收精细结构分析
DOI：
10.1143/jjap.49.082602
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发表时间：
2010
影响因子：
1.5
通讯作者：
Asuka Sasakura
中科院分区：
文献类型：
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作者：
K. Ichino;Haruki Kato;Y. Sakai;K. Ohmi;T. Honma;J. Itoh;Asuka Sasakura
研究了ZnS：Cu，Cl薄膜荧光粉在无树脂白色发光二极管（LED）中的应用。采用分子束沉积技术在较高的衬底温度下生长的ZnS：Cu，Cl多晶薄膜具有较强的蓝绿色光致发光（PL）。具有相对高的Cu浓度（约1%）的膜表现出增强的近紫外激发带以及强PL，使它们适合于由UV LED激发;然而，在可见光谱范围内的透射率降低。荧光膜的X射线吸收精细结构分析表明，Cu原子取代Zn的网站在低Cu浓度，而过量的Cu原子以不同的形式存在，可能作为CuS样沉淀物，在高Cu浓度。添加Al施主的荧光粉薄膜增强了PL强度和透明度，导致从沉淀物的量减少。
ZnS:Cu,Cl thin-film phosphors have been studied for possible application to resin-free white light-emitting diodes (LEDs). The ZnS:Cu,Cl polycrystalline films grown by a molecular-beam deposition technique at relatively high substrate temperatures exhibit strong blue-green photoluminescence (PL). The films with a relatively high (∼1%) Cu concentration exhibit an enhanced near-UV excitation band as well as strong PL, making them suitable for excitation by UV LEDs; however, the transmission in the visible spectral range decreases. The X-ray absorption fine structure analysis of the phosphor films suggests that Cu atoms substitute for Zn sites at low Cu concentrations, whereas excess Cu atoms exist in a different form, possibly as CuS-like precipitates, at high Cu concentrations. The addition of Al donors to the phosphor films enhances the PL intensity and transparency, resulting from a reduction in the amount of the precipitates.
DOI：
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发表时间：
1987-07
期刊：
--
影响因子：
--
作者：
小杉 信博
通讯作者：
小杉 信博