空气中合成固溶体荧光粉Ba2(Zn, Mg)Si2O7:Eu2+,Eu3+,Ce3+及其发光特性
Solid-Solution Phosphor Ba2(Zn,Mg)Si2O7:Eu2+,Eu3+,Ce3+ Prepared in Air and Its Luminescent Properties
作者单位E-mail
邓升智 湖南师范大学化学化工学院, 化学生物学及中药分析教育部重点实验室, 资源精细化与先进材料湖南省高校重点实验室, 长沙 410081  
刘晨 湖南师范大学化学化工学院, 化学生物学及中药分析教育部重点实验室, 资源精细化与先进材料湖南省高校重点实验室, 长沙 410081  
杨楚珺 湖南师范大学化学化工学院, 化学生物学及中药分析教育部重点实验室, 资源精细化与先进材料湖南省高校重点实验室, 长沙 410081  
邱忠贤 湖南师范大学化学化工学院, 化学生物学及中药分析教育部重点实验室, 资源精细化与先进材料湖南省高校重点实验室, 长沙 410081  
周文理 湖南师范大学化学化工学院, 化学生物学及中药分析教育部重点实验室, 资源精细化与先进材料湖南省高校重点实验室, 长沙 410081  
张吉林 湖南师范大学化学化工学院, 化学生物学及中药分析教育部重点实验室, 资源精细化与先进材料湖南省高校重点实验室, 长沙 410081  
余丽萍 湖南师范大学化学化工学院, 化学生物学及中药分析教育部重点实验室, 资源精细化与先进材料湖南省高校重点实验室, 长沙 410081  
廉世勋 湖南师范大学化学化工学院, 化学生物学及中药分析教育部重点实验室, 资源精细化与先进材料湖南省高校重点实验室, 长沙 410081 shixunlian@gmail.com 
摘要: 采用高温固相法在空气中合成了Ba1.97-yZn1-xMgxSi2O7:0.03Eu,yCe3+系列荧光粉.分别采用X-射线衍射和荧光光谱对所合成荧光粉的物相和发光性质进行了表征.在紫外光330~360nm激发下,固溶体荧光粉Ba1.97-yZn1-xMgxSi2O7:0.03Eu的发射光谱在350~725nm范围内呈现多谱峰发射,360和500nm处有强的宽带发射属于Eu2+离子的4f65d1-4f7跃迁,590~725nm红光区窄带谱源于Eu3+5D0-7FJ(J=1,2,3,4)跃迁,这表明,在空气气氛中,部分Eu3+在Ba1.97-yZn1-xMgxSi2O7基质中被还原成了Eu2+;当x=0.1时,荧光粉Ba1.97Zn0.9Mg0.1Si2O7:0.03Eu的绿色发光最强,表明Eu3+被还原成Eu2+离子的程度最大.当共掺入Ce3+离子后,形成Ba1.97-yZn0.9Mg0.1Si2O7:0.03Eu,yCe3+荧光粉体系,其发光随着Ce3+离子浓度的增大由蓝绿区经白光区到达橙红区;发现名义组成为Ba1.96Zn0.9Mg0.1Si2O7:0.03Eu,0.01Ce3+的荧光粉的色坐标为(0.323,0.311),接近理想白光,是一种有潜在应用价值的白光荧光粉.讨论了稀土离子在Ba2Zn0.9Mg0.1Si2O7基质中的能量传递与发光机理.
关键词: Ba1.97Zn1-xMgxSi2O7  Ba1.97-yZn0.9Mg0.1Si2O7:0.03Eu,yCe3+  自还原  白光荧光粉
基金项目: 湖南省高校科技创新团队计划(湘教通[2012]318号),湖南省自然科学基金(No.2015JJ2100)和国家大学生创新性实验计划资助项目.
Abstract: Ba1.97Zn1-xMgxSi2O7:0.03Eu and Ba1.97-yZn0.9Mg0.1Si2O7:0.03Eu,yCe3+ phosphors were synthesized in air condition by a high temperature solid-state reaction. Crystallization and optical properties were investigated by using powder X-ray diffraction and fluorescence spectrophotometer, respectively. Under the excitation of ultraviolet (330~360 nm), the emission spectra of these solid-solution phosphors exhibit multi-emission bands peaked at about 360 nm(blue-purple color), 500 nm (green color) and 590~725 nm (red color), the two formers are corresponding to the 4f65d1-4f7 transition of Eu2+, the latter is originated from the 5D0-7FJ (J=1,2,3,4) transitions of Eu3+. The investigated results indicate that part of Eu3+ can be self-reduced to Eu2+ in the matrix and will reach the maximum when x=0.1 mol. When co-doping Ce3+ ions, the luminescent colors of the phosphors Ba1.97-yZn0.9 Mg0.1Si2O7:0.03Eu,yCe3+ can be tunable from green to white to orange area. It had been found that the nominal composition Ba1.96Zn0.9Mg0.1Si2O7:0.03Eu,0.01Ce3+ phosphor provides a white emission (0.323, 0.311) that is very close to the standard white (x=0.33, y=0.33), which shows that it is a potential white phosphor for LED-based UV-chip. The energy transfer processes among rare earths and the luminescent mechanism were discussed.
Keywords: Ba2Zn1-xMgxSi2O7  Ba1.97-yZn0.9Mg0.1Si2O7:0.03Eu,yCe3+  self-reduction  white-light phosphor
投稿时间:2014-05-18 修订日期:2014-09-10
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邓升智,刘晨,杨楚珺,邱忠贤,周文理,张吉林,余丽萍,廉世勋.空气中合成固溶体荧光粉Ba2(Zn, Mg)Si2O7:Eu2+,Eu3+,Ce3+及其发光特性[J].无机化学学报,2015,31(2):229-236.
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