微乳液法合成Y_2SiO_5∶Eu^(3+)及其发光性质研究  

Synthesis by Microemulsion and Luminescence Properties of Y_2SiO_5∶Eu^(3+)

作　　者：霍涌前[1] 贺亚婷 赵乐乐[1] 刘晓莉[1] 陈小利[1] 

机构地区：[1]陕西省化学反应工程重点实验室延安大学化学与化工学院,陕西延安716000

出　　处：《合成材料老化与应用》2016年第3期74-79,共6页Synthetic Materials Aging and Application

基　　金：国家自然科学基金(21101133)资助

摘　　要：采用微乳液法合成了Y_2SiO_5∶Eu^(3+)系列荧光粉。利用XRD、扫描电镜(SEM)、光电子能谱(EDS)、荧光光谱、色坐标等研究了所制备荧光粉的结构、形貌和发光性能。光电子能谱数据验证了合成样品的离子掺杂量。荧光光谱测试表明,Y_2SiO_5∶Eu^(3+)监测光谱呈现200nm^300nm的宽带吸收峰和Eu3+的系列吸收峰。在253nm紫外光激发下,Y_2SiO_5∶Eu^(3+)材料的发射光谱为一个多峰谱,主峰分别为5D0→7F1(591nm)、5D0→7F2(616nm)的发光峰。当Eu3+掺杂物质的量大于24%时,出现了浓度猝灭现象。通过色坐标图可知,当Eu3+掺杂量为24%时,荧光粉的色坐标(0.503,0.366)与标准的红光色坐标接近,表明Y_2SiO_5∶Eu^(3+)是很好的近紫外光激发下的红色荧光粉。Europium（ III）-doped Y2SiO5 phosphor particles were synthesized using the microemulsion method.The products were studied by X-ray powder diffraction（ XRD）,scanning electron microscopy（ SEM）,energy dispersive spectrometer（ EDS） and photoluminescence（ PL） spectroscopy. The samples exhibited a broad absorption band in the range of 200 nm 300 nm and a series of individual absorption peaks of Y2SiO5∶Eu（3＋）. The emission spectrum of Y2SiO5∶Eu（3＋）showed several bands at 591 nm and 616 nm under the 253 nm excitation. The emission spectra excited by 253 nm were composed of5D0→7F1（ 591nm）,5D0→7F2（ 616nm） emission bands was shown.The luminous intensity of the sample became more intensive along with the increase of the Eu（3＋） doping amount,and it could be the maximum at Eu（3＋） ion content of 24%. From Commission Internationale de L＇Eclairage（ CIE） chromaticity diagram,it is noted that red light can be achieved in Y2SiO5∶ 24% Eu（3＋）phosphor,the CIE color coordinates（ 0. 503,0. 366） are near to the standard color coordinates.

关 键 词：Y2SiO5∶Eu3+ 发光材料 红光 微乳液法 

分 类 号：O482.31[理学—固体物理]