Sol-gel法制备Er^(3+)掺杂Yb_2Ti_2O_7粉末上转换发光特性  

Upconversion Emissions of Er^(3+)-doped Yb_2Ti_2O_7 Powders by Sol-gel Method

作　　者：曹保胜[1] 孙翼[1] 关全寅[1] 

机构地区：[1]大连民族学院理学院,辽宁大连116600

出　　处：《光子学报》2011年第1期64-67,共4页Acta Photonica Sinica

基　　金：中央高校基本科研业务费专项资金(No.DC10040122)资助

摘　　要：采用溶胶-凝胶法制备了8 mol%Er3+掺杂单一Yb2Ti2O7相粉末.976 nm半导体激光器激发Er3+掺杂Yb2Ti2O7粉末获得中心波长524、548 nm的绿色和660 nm的红色上转换发光,绿色和红色上转换发光强度(Igreen、Ired)随激光泵浦功率的增大而增强,且绿色和红色上转换发光均为双光子吸收过程.随着Er3+掺杂Yb2Ti2O7粉末温度的升高,Igreen和Ired逐渐减弱但强度比Igreen/Ired逐渐增大,中心波长524和548 nm的绿色上转换发光强度比I524/I548也逐渐增大.绿色上转换发光与温度的依赖关系使得Er3+掺杂Yb2Ti2O7粉末在光学高温传感器方面具有潜在应用.The 8 mol% Er3＋-doped Yb2Ti2O7 powder,which was composed of single phase of Yb2Ti2O7,was prepared by sol-gel method.The green and red upconversion emissions of Er3＋-doped Yb2Ti2O7 centered at about 524,548 and 660 nm were detected by a 980 nm semiconductor laser diode excitation.The intensities of green and red upconversion emissions（Igreen,Ired） increased with increasing the pump power of laser diode.The two-photon absorption upconversion process was involved in the green and red upconversion emissions.With increasing the temperature of Er3＋-doped Yb2Ti2O7 powder,Igreen and Ired decreased with the ratio of Igreen/Ired increasing,while the intensity ratio of green upconversion emissions centered at about 524 and 548 nm（I524/I548） increased.The result implies that the Er3＋-doped Yb2Ti2O7 powder with the change of green upconversion emissions depending on the temperature of powder has a potential application for optical high temperature sensor.

关 键 词：Er3+掺杂Yb2Ti2O7 溶胶-凝胶法 上转换发光 

分 类 号：TQ134[化学工程—无机化工]