Eu^(2+)-Yb^(3+)共掺磷酸盐玻璃中的合作能量传递(英文)  

Cooperative Energy Transfer in Eu^(2+)-Yb^(3+) Codoped Phosphate Glasses

作　　者：徐波[1] 杨斌[1] 张约品[1] 王金浩[1] 夏海平[1] 

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

出　　处：《光子学报》2013年第2期127-131,共5页Acta Photonica Sinica

基　　金：The National Natural Science Foundation of China(Nos.61275180,50972061,51272109);the Natural Science Foundation of Zhejiang Province(Nos.Z4110072,R4100364);the Opening Foundation of Zhejiang Provincial Top Key Discipline;K.C.Wang Magna Fund in Ningbo University

摘　　要：报道了在Eu2+-Yb3+共掺磷酸盐中,一个紫外光子(320nm)通过下转换发光变成两个近红外光子(约1 000nm)的现象.测试了不同样品的吸收、激发和发射光谱,证明了在本玻璃体系中量子剪裁现象的存在;Eu2+离子5d-4f能级发光的衰减曲线证明Eu2+到Yb3+之间的合作能量传递;用I-H理论模型拟合衰减曲线说明了能量传递的过程.最后计算出了能量传递的效率,当Yb3+浓度为1.0mol%时效率为23.05%,当其增加到2.0mol%时,能量传递效率提高到了53.6%.Downconversion luminescence of one UV photon（320 nm） cut into two near-infrared photons（around 1 000 nm） was reported in Eu2＋-Yb3＋ co-doped phosphate glasses.Absorption,excitation and emission spectra were carried out to demonstrate the occurrence of quantum cutting in this system.The experimental evidences of the cooperative energy transfer from Eu2＋ to Yb3＋ were presented by the decay curves of 5d→4f emission of Eu2＋ ions.Luminescence decay curves of Eu2＋ emission were recorded as a function of the Yb3＋ concentration and analyzed by using Inokuti-Hirayama’s model for energy transfer.Energy transfer efficiency was also calculated to be 23.05% for the Eu2＋-1.0Yb3＋ co-doped sample,and 53.6% increased for the Eu2＋-2.0Yb3＋ co-doped sample.

关 键 词：能量传递 下转换 激发和发射 磷酸盐玻璃 

分 类 号：O482.31[理学—固体物理]