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采用溶胶-凝胶法成功制备了一系列Er3 掺杂的透明纳米LaF3-SiO2玻璃-陶瓷样品,并研究了其上转换发光性质与发光机制.研究得到了Er3 浓度对上转换发光的影响规律,拟合了上转换荧光强度与LD工作电流的关系,发现所得结果与理论值能够很好地一致.在980nm激光二极管激发下,获得了发射波长为520、540、660nm的有效上转换发光.在较低的功率泵浦下,540nm波长的绿光波段发射最强,其发光主要过程是处于4F7/2态的Er3 离子能量大部分被弛豫到4S3/2态,再由此激发态跃迁到基态4I15/2态所致. 相似文献
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概述了等离子体显示技术的研究进展,着重讨论了彩色等离子体显示中在提高发光效率和亮度、提高对比度等方面的最新技术。 相似文献
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Electroluminescence (EL)devicesareavailableforcompletesoliddisplays .Alargeareadisplaycanalsobeeasilyrealizedbytheuseofthesedevices .Be causeoftheirhighbrightnessandlonglife ,manystudieshaverecentlybeenmadeofthin filmELde vicesconsistingofaZnS∶Tblayersandw… 相似文献
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<正> In electroluminescence the extrinsic light emission follows the impact excitation of discrete centers and the impact ionization of recombination centers. From our experiments we found that these processes are quite different in their behaviour. In case of discrete centers the emission is almost independent on the nature of applied voltage (dc or ac voltage). But 相似文献
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Doped Organic Electroluminescence from a Novel Rare Earth Complex Tb (3-metho) 3 phen 总被引:1,自引:0,他引:1
A novel rare earth complex Tb (3-metho)3phen was synthesized and characterized. The complex was doped into PVK to improve the conductivity and film-forming property of Tb(3-metho) 3phen. A device with a structure of ITO/PVK: Tb(3-metho)3phen/Al was fabricated to study the eleetrolumineseent properties of Tb(3-metho) 3 phen. And the optoluminescent and AFM properties of this device were also studied, which proved the existence of energy transfer from PVK to Tb(3-metho)3phen. As a result, a pure green emission with sharp spectral band at 547.5 nm was observed. 相似文献
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InfluenceofGa3+onPhotoluminescenceofCe3+XuChunxiang(徐春祥),LouZhidong(娄志东)(InstituteofMaterialPhysics,TianjinInstituteofTechno... 相似文献
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