沉淀法合成纳米晶上转换发光材料Y2O2S∶Yb，Er  

Synthesis of Nanocrystalline Y_2O_2S:Yb,Er Upconversion Luminescence Material by Coprecipitation

作　　者：张俊文[1] 谭宁会[1] 刘应亮[1] 满石清[2] 

机构地区：[1]暨南大学化学系,暨南大学纳米化学研究所,广州510632 [2]暨南大学电子系,广州510632

出　　处：《无机化学学报》2010年第2期229-232,共4页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.50872045,20671042);广东省自然科学基金资助项目(No.7005918,05200555,2006B14801003)

摘　　要：采用沉淀法在不同温度下合成了纳米上转换发光材料Y2O2S∶Yb,Er,运用XRD、TEM和上转换发光光谱对其进行表征。结果表明,使用该法在700℃即能合成纳米上转换发光材料Y2O2S∶Yb,Er,随着合成温度的升高,产物的粒径从60到120nm逐渐增大。上转换发光光谱显示该材料主要有2个发射带,其中红光发射的中心波长位于668nm,绿光发射的中心波长位于525和550nm。此外,对材料的上转换发光过程进行了探讨。The up-conversion luminescence material yttrium oxysulfide doped with Yb3＋/Er3＋ was systhesized by coprecipitation method followed by subsequent thermal decomposition in presence of sulphur. The products were characterized by XRD, up-conversion luminescence spectra and TEM. The XRD results indicate that the synthesis temperature is up to 700 ℃. And from the TEM, the average diameter of particles is in the range of 60-120 nm, and augmented with the increase of temperature. The materials under 980 nm laser excitation presents strong green emission related to 2H11/2, 4S3/2→4I15/2 Er transitions as well as the red ones, 4F9/2→4I15/2. The upconversion mechanism is discussed too.

关 键 词：沉淀法 上转换发光 能量传递 

分 类 号：O614.322[理学—无机化学] O613.51[理学—化学]