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Silicate orange yellow phosphor used in white-light LED was prepared by microwave method. The structure and optical properties of phosphor were studied. Sr3SiO5∶Eu2+ phosphor synthesized by microwave method is tetragonal structure of Sr3SiO5 with uniform particle distribution. Luminescence spectrum is a broad band spectrum peaking at 575 nm. The peak of excitation is at 532 nm and phosphor can be excited by blue LED. The warm white light was obtained combined phosphor and blue LED. The CIE chromaticity coordinates and correlated color temperature of white light is (x=0.394, y=0.341) and 3 239 K respectively. 相似文献
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采用Bridgman方法在氩气氛保护的单晶炉内生长出了Ce3+掺杂的以及Ce3+和Eu3+共掺的CaF2晶体,利用Ce2O3和E2O3分别与氢氟酸反应合成了CeF3和EuF3掺杂试剂,对掺杂晶体生长的起始原料—特定组成的CaF2、CeF3、EuF3混合物进行了高温氟化处理,确定了掺杂晶体的物相,讨论了掺杂浓度对晶体紫外波段透过率的影响。此外,还初步分析了Ce3+和Eu3+共掺的CaF2晶体作为紫外滤光材料的可行性。 相似文献
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