BaMgF_4:Er^(3+),Yb^(3+)上转换纳米晶的合成及其发光性能研究  

Synthesis and upconversion luminescent properties of BaMgF_4: Er^（3+）, Yb^(3+)nanocrystals

作　　者：潘成龙[1] 刘红利[1] 郭芸[1] 景姝[1] 孙静[1] 周禾丰[1] 王华[1] 

机构地区：[1]太原理工大学新材料界面科学与工程教育部重点实验室,太原030024

出　　处：《物理学报》2014年第15期202-206,共5页Acta Physica Sinica

基　　金：教育部新世纪人才计划(批准号:NCET-13-0927);科技部国际合作项目(批准号:2012DFR50460);国家自然科学基金(批准号:21101111;61307030;61307029);山西省科技创新团队建设计划项目(批准号:2012041011)资助的课题~~

摘　　要：采用反向共沉淀法制备了形貌呈棒状的BaMgF4:Er3+,Yb3+上转换纳米晶.样品在980 nm半导体激光器激发下发射绿色和红色上转换荧光,其发射的绿、红发射带归因于Er3+离子的2H11/2—4I15/2,4S3/2—4I15/2和4F9/2—4I15/2跃迁.当Er3+的掺杂浓度为3%,Yb3+离子掺杂浓度为10%时,荧光粉的上转换发光强度最强;随着Yb3+离子浓度的增加样品的红光发射增强,绿光发射减弱.通过上转换发光强度与抽运电流关系曲线的拟合,得出BaMgF4:Er3+,Yb3+上转换材料的绿光与红光的上转换过程均为双光子吸收过程.BaMgF4 ：Er3＋, Yb3＋ nanocrystals in rod-shape are synthesized by means of the reverse co-precipitation. They emit green and red light under excitation of near-infrared light （980 nm）. The green and red emissions may be attributed to the 2H11/2-4I15/2, 4S3/2-4I15/2 and 4F9/2-4I15/2 transitions of Er3＋. Dopant ions Yb3＋ as sensibilizers can improve the upconversion transformation efficiency. The emission intensity is the strongest when the contents of Er3＋ and Yb3＋ are 3% and 10%, respectively. With increasing concentration of Yb3＋, the red emission intensity increases while the green emission reduces. And the conversion fitting curve between the luminous intensity and pump current indicates that the upconversion process of the green and red light of BaMgF4 ： Er3＋, yb3＋ is due to two-photon absorption.

关 键 词：BaMgF4 ER3+ YB3+ 反向共沉淀法 上转换 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O482.31[理学—固体物理]