燃烧合成纳米Y_2O_2S：Eu~（3＋）,Mg~（2＋）,Ti~（4＋）红色长余辉发光材料

摘要

用燃烧法成功合成了纳米Y2O2S：Eu3＋,Mg2＋,Ti4＋红色长余辉发光材料,采用X射线粉末衍射仪（XRD）、扫描电镜（SEM）、荧光光谱仪（PL）对样品进行了物相组成、显微形貌、激发发射光谱等进行了表征.样品的主要组成为Y2O2S;呈厚度为40~70 nm,直径为100~200 nm的纳米片;在626 nm和617 nm处有强烈的红色发射.与固相法比较,激发光谱略有蓝移.%NanocrystallineY202S： Eu3＋, Mg2＋, Ti4＋ red long afterglow phosphor was successfully fabricated by combustion synthesis. The phase composition, morphology and luminescence properties were investigated by X- ray diffraction （XRD）, scanning electron microscopy （SEM） and photolumineseence （PL） spectra. The morphology of the sample was circular nanosheets with thickness in range of 40-70 nm and diameter in range of 100~200 nm. The Y202S： Eu3＋, Mg2＋, Ti4＋exhibited strong red emission at 626 nm and 617 nm. Compared Y202S： Eu3＋, Mg2＋, Ti4＋ material, the excitation peak of nanocrystalline phosphor showed apparent excitation spectrum. with the bulk blue-shift in