Tb^(3+)/Yb^(3+)共掺α-NaYF_4单晶近红外到可见光的合作上转换发光（英文）  

Cooperative Near-Infrared to Visible Up-conversion Luminescence of Tb^(3+)/Yb^(3+) Co-dopedα-NaYF_4 Single Crystal

作　　者：张加忠[1] 夏海平[1] 姜永章 杨硕[1] 谷雪梅[1] 章践立[1] 江浩川[2] 陈宝玖[3] 

机构地区：[1]宁波大学光电子功能材料重点实验室,浙江宁波315211 [2]中国科学院宁波材料与技术工程研究所,浙江宁波315211 [3]大连海事大学物理系,辽宁大连116026

出　　处：《硅酸盐学报》2016年第1期125-128,共4页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(51472125,51272109);宁波大学王宽诚基金项目

摘　　要：用980 nm的近红外激光泵浦Bridgman方法生长的Tb^(3+)/Yb^(3+)共掺的α-NaYF_4单晶,研究了其上转换荧光以及荧光强度与泵浦功率的关系。结果表明:2个或者3个激发态的Yb^(3+)离子传递能量给1个Tb^(3+)离子并引发了双光子或三光子上转换。高效的三光子上转换的381、414、435和462 nm光和双光子上转换的481、541、587、651、659和668 nm光分别产生于Tb^(3+)离子的~5D_3→~7F_J(J=6,5,4,3)和~5D_4→~7F_J(J=6,5,4,3,2,1)辐射跃迁。现有实验下,当Tb^(3+)的掺杂量为0.52%(摩尔分数)时,Yb^(3+)的最佳掺杂量为7.98%,并可以进一步增加。以上结果表明了Tb^(3+)/Yb^(3+)共掺的α-NaYF_4单晶在上转换绿光固体激光材料方面的潜在应用。The up-conversion （UC） luminescence and the pump power dependence on the UC emissions of the Tb3＋/Yb3＋ co-doped ct-NaYF4 single crystals grown by the Bridgman method under the excitation of near-infrared light at 980 nm were investigated. The results show that three or two excited Yb3＋ ions transferring the energy to a Tb3＋ ion can lead to the three- or two-photon UC process. The efficient three- photon UC emission at 381,414, 435 and 462 nm and the two-photon UC emissions at 481,541,587, 651,659 and 668 nm occur due to the transitions 5D3→7FJ （J= 6, 5, 4 and 3） and 5D4→7FJ （3= 6, 5, 4, 3, 2 and 1） of Tb3＋, respectively. The ptimized Yb3＋ concentration is 7.98% （mole fraction） at Tb3＋ concentration of 0.52%. It is indicated that Wb3＋/yb3＋ doped α-NaYF4 single crystal is a promising candidate of the UC material applied for the green solid-state laser.

关 键 词：氟化钇纳单晶 铽/镱共掺 上转换发光 稀土发光 

分 类 号：TB333[一般工业技术—材料科学与工程]