【作者】 王少丽；

【导师】 郭庆林； 杨志平；

【作者基本信息】 河北大学 ， 光学， 2008， 硕士

【摘要】 首次利用高温固相法制备了黄色荧光粉Ca2BO3Cl：Eu2+,并研究了该荧光粉的发光特性以及制备过程中各种条件对荧光粉发光性质的影响。当原料于900℃下烧结2.5h,Eu2+浓度为1.5%时,可以得到性能优良的荧光粉。从样品的激发光谱和发射光谱可以看出：Ca2BO3Cl：Eu2+的激发峰位于413nm和475nm,与蓝光和紫外LED芯片匹配；发射谱为峰值位于573nm处的宽带谱,它既可与芯片发出的蓝光组合成白光,还可以作为紫外芯片激发的黄色荧光粉,与其它颜色荧光粉混合得到白光发射。制备了红色荧光粉CaAl2B2O7：Eu3+,从它的发光性质可以看出：该荧光粉可作为红色补光粉弥补现有白光LED缺少红光的不足,也可以作为紫外芯片激发的红粉。利用固相法制备了Eu2+激活的Ba282P2O10绿色和Ca2B5O9Cl蓝色荧光粉,对样品进行了X射线衍射分析和发光特性研究,确定了掺杂浓度以及各组分含量对样品发光特性的影响情况。更多还原

【Abstract】 The yellow phosphor Ca2BO3Cl:Eu2+ was prepared by high temperate solid stated method and the influence of different procedure conditions on its luminescent properties was studied. When initiative temperature was 900℃for 2.5 h and the concentration of Eu2+ was 1.5%, the high performance phosphor could be formed. It could be seen from excitation and emission spectra that the excitation peaks were at 413nm,475nm and the emission peak was at 573nm. This phosphor is very suitable for a color converter of white LED that uses blue LED as the primary light source. Also it can be used as a yellow phosphor excited by UV LED or mix with other color phosphors to product white light. The red phosphor CaAl2B2O7:Eu3+ was formed for the first time in this paper. It could be seen from its luminescent properties that this phosphor could be excited effectively by blue chip and UV chip and emited pure red light. So it can be used for the compensating phosphor in "blue +yellow" model and the red phosphor in the white LED that composed by UV chip and multi color phosphors.The Ba2B2P2O10:Eu2+ and Ca2B5O9Cl:Eu2+ were fabricated by solid stated method. The x-ray diffraction patterns and the luminescent properties were studied. And the effects of the concertration of Eu2+ and the ratio of elements on the luminescent properties were investigated.更多还原