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Synthesis of ultra fine particle phosphors with high performance by sol-gel method

溶胶-凝胶法合成高性能超细颗粒荧光粉

基本信息

批准号：
10650665
负责人：
NAKANISHI Yoichiro
金额：
$ 2.18万
依托单位：
SHIZUOKA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

Investigators of this project have been studying on the development of ultra fine particle phosphors with high performance for field emission displays (FEDs). In this project, the phosphors such as SrTiOィイD23ィエD2:Pr, Al, YィイD22ィエD2OィイD22ィエD2S:Eu , SnOィイD23ィエD2:Eu, TiOィイD22ィエD2:Eu, YィイD22-XィエD2ZnィイD2XィエD2OィイD23ィエD2:Eu etc. were prepared with fine particle sizes by sol-gel.To obtain high luminance from SrTiOィイD23ィエD2:Pr red emitting, the addition of Al to the phosphor is necessary. When the Al addition is 30 mol%, which is optimum in this investigation, the SrTiOィイD23ィエD2:Pr, Al phosphor shows a luminance of 34 cd/mィイD12ィエD1 and CIE color coordinates of (0.681, 0.314) under excitation with 2 kV and 108 μA/cmィイD12ィエD1 cathode. It was shown for the first time for the mechanism of the effect of the Al addition that (1) almost all of the added Al distribute as AlィイD22ィエD2OィイD23ィエD2 on the phosphor surface observed by specific X-my image of SEM, (2) Al introduced into SrTiOィイD23ィエD2 bulk cont … More ributes for the improvement of luminance by forming 4 coordination observed by nuclear magnetic resonance measurement.YィイD22ィエD2OィイD22ィエD2S:Eu phosphor with particle size smaller than 0.5 μm could be synthesized successfully. The particle size is smaller than that of phosphor on the market. Moreover, the phosphor shows a luminance of 320 cd/mィイD12ィエD1 color coordinates of (0.648, 0.342) under excitation with 1 kV and 60 μA/cmィイD13ィエD1. The luminance is higher than that of commercial phosphor. It was found for the synthesis of SnOィイD22ィエD2:Eu phosphor that the phosphor with smaller particle size and showing luminance with 20 times was successfully obtained using ethanol as solvent for SnC1ィイD24ィエD2 and EuClィイD23ィエD2 than the phosphor prepared in water. It was found for the first time that the crystallinity and luminance of the YィイD22ィエD2OィイD23ィエD2:Eu phosphor increases considerably by the addition of Zn. The phosphor added with 5 mol% Zn showed a luminance of 1000 cd/mィイD12ィエD1 and CIE color cordinates of (0.643, 0,345) under excitation with 2 kV mid 60 mA/cmィイD12ィエD1, and those data are promising for the commercial use. Less

该项目的研究人员一直在研究开发用于场发射显示器（FEDs）的高性能超细颗粒荧光粉。本课题采用溶胶-凝胶法制备了SrTiO ↓ [23] Eu ↓ [23] D2：Pr、Al、Y ↓ [23] Eu ↓ [22] D2 O ↓ [23] Eu ↓ [23] D2 S：Eu、SnO ↓ [23] Eu ↓ [23] D2：Eu、TiO ↓ [22] Eu ↓ [22] D2：Eu、Y ↓ [23] Eu ↓ [22-X] Zn ↓ [23] Eu ↓ [24] D2 X] Eu ↓ [23] D2 O ↓ [24] Eu ↓ [23] D2：Eu等荧光粉，为使SrTiO ↓ [23] Eu ↓ [23] D2：Pr红光发光获得高亮度，需要在荧光粉中加入Al。当Al的添加量为30mol%时，SrTiO_（2 - 3）Pr_（2 - 3）D_2：Pr，Al荧光粉在2kV、108 μA/cm ~ 2激发下，亮度为34 cd/m ~ 2，色坐标为（0.681，0.314）。首次揭示了Al的作用机理：（1）通过SEM的X射线衍射分析，发现Al在SrTiO_2 O_ ...更多信息通过核磁共振（NMR）分析发现，Eu：Eu荧光粉的发光机理是形成4配位结构，并成功合成了粒径小于0.5 μm的Y：D22：D2 O：D22：D2 S：Eu荧光粉。粒径小于市场上的荧光粉。此外，在1 kV和60 μA/cm λ D13 λ D1激发下，荧光粉显示出320 cd/m λ D12 λ D1的亮度，色坐标为（0.648，0.342）。发光亮度高于市售荧光粉。研究发现，在SnOイD22 D2：Eu荧光粉的合成中，使用乙醇作为SnC 1イD24 D2和EuClイD23 D2的溶剂，与在水中制备的荧光粉相比，成功获得了粒径更小、亮度提高20倍的荧光粉。首次发现Zn的加入使Y_xD_22_xD_2O_xD_23_xD_2：Eu荧光粉的结晶度和亮度显著提高。添加5mol%Zn的磷光体在2kV和60 mA/cm的电流密度下激发时显示出1000 cd/m的亮度D12 λ D1和（0.643，0，345）的CIE色坐标，这些数据对于商业应用是有希望的。少