文献类型：期刊文献

英文题名：Fast and intense green emission of Tb3+ in borosilicate glass modified by Cu+

作者：Xia, Fanshu[1];Liu, Siyuan[1];Wang, Yang[1];Mao, Jiayi[1];Li, Xinxi[1];Wang, Yiqun[1];Chen, Guorong[1]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：5

外文期刊名：SCIENTIFIC REPORTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000363105300001)】；

基金：This study was supported jointly by Shanghai Leading Academic Discipline Project (No. B502), Shanghai Key Laboratory Project (08DZ2230500), National Natural Science Foundation of China (NSFC 51572081) and Doctoral Fund of Ministry of Education of China (20120074110018).

语种：英文

摘要：We present photoluminescence properties of Tb3+ doped borosilicate glasses modified by Cu+. Around 5-time enhanced emission at 541 nm due to the superposed emission of Tb3+ and Cu+ is observed under the deep UV excitation. Excitation spectra demonstrate a greatly increased absorption of Tb3+ ions in the deep UV region towards the Cu+ excitation band, while the shortened Cu+ emission lifetime of glasses in association with presence of Tb3+ ions implies an energy transfer process from Cu+ to Tb3+ ions. Meanwhile, the Tb3+ emission lifetime is significantly shortened from the conventional millisecond level (similar to 4 ms) to the microsecond regime up to around 90 mu s. This most likely starts with the role of Cu+ as a co-activator by initiating the d-f orbital hybridization process via an interaction with Tb3+, thus relaxing the spin forbidden transition of Tb3+ ions to the partially allowed one. Moreover, combination of emissions from Cu+ and Tb3+ ions generates a composite green emission with adjustable CIE (Commission Internationale de L'Eclairage) chromaticity coordinates achievable by co-doping Cu+/Tb3+ in the different ratio and/or altering the excitation wavelength from deep UV to near UV region.