Photoluminescence studies of Eu^(2+)-Yb^(3+) co-doped BaMgAl_(10)O_(17) phosphor synthesized by the combustion method  

作　　者：吴凌远 田秀娜 韦先涛 陈永虎 尹民 

机构地区：[1]Department of Physics,University of Science and Technology of China

出　　处：《Journal of Rare Earths》2012年第12期1213-1216,共4页稀土学报（英文版）

基　　金：Project supported by National Natural Science Foundation of China (11074245, 11074315, 11204292, 11174005);the Fundamental Research Funds for the Central Universities (2340000034);the Funding of Creative Youth by University of Science &Technology of China

摘　　要：BaMgAl10Ol7：Eu^2＋,Yb^3＋ was investigated as a possible quantum cutting system to enhance solar cells efficiency. Phosphors were synthesized by combustion method and composed of nanorods. Photoluminescence spectra showed that Eu in the sample was reduced to bivalence while Yb remained trivalence. Through a cooperative energy transfer process, the obtained powders exhibited both blue emission of Eu^2＋ （around 450 nm） and near infrared emission of Yb^3＋ （around 1020 nm） under broad band excitation （250-410 nm） originating from 4f→5d transition of Eu2＋. Energy transfer phenomenon between the sensitizer Eu2＋ and the activator Yb3＋ was investigated via the luminescent spectra and the decay curves of Eu2＋ with different Yb3＋ concentrations. Results indicated that energy transfer efficiency from Eu2＋ to Yb3＋ was not high. The poor efficiency can be explained by the long distance between rare earth ions.BaMgAl10Ol7：Eu^2＋,Yb^3＋ was investigated as a possible quantum cutting system to enhance solar cells efficiency. Phosphors were synthesized by combustion method and composed of nanorods. Photoluminescence spectra showed that Eu in the sample was reduced to bivalence while Yb remained trivalence. Through a cooperative energy transfer process, the obtained powders exhibited both blue emission of Eu^2＋ （around 450 nm） and near infrared emission of Yb^3＋ （around 1020 nm） under broad band excitation （250-410 nm） originating from 4f→5d transition of Eu2＋. Energy transfer phenomenon between the sensitizer Eu2＋ and the activator Yb3＋ was investigated via the luminescent spectra and the decay curves of Eu2＋ with different Yb3＋ concentrations. Results indicated that energy transfer efficiency from Eu2＋ to Yb3＋ was not high. The poor efficiency can be explained by the long distance between rare earth ions.

关 键 词：BAM combustion method DOWNCONVERSION energy transfer rare earths 

分 类 号：O614.3[理学—无机化学]