Broadband downconversion in YVO_4:Tm^(3+),Yb^(3+) phosphors  

作　　者：姜桂铖 韦先涛 陈永虎 段昌奎 尹民 

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

出　　处：《Journal of Rare Earths》2013年第1期27-31,共5页稀土学报（英文版）

基　　金：Project supported by the National Key Basic Research Program of China (2013CB921800);the National Natural Science Foundation of China (11074245, 11204292, 11274299);the Fundamental Research Funds for the Central Universities (WK2030020022)

摘　　要：An efficient near-infrared （NIR） downconversion （DC） by converting broadband ultraviolet （UV） into NIR was demon- strated in YVO4：Tma＋,yb3＋ phosphors. The phosphors were extensively characterized using various methods such as X-ray diffrac- tion, photoluminescence excitation, photoluminescence spectra and decay lifetime to provide supporting evidence for DC process. Upon UV light varying from 260 to 350 nm or blue light （473 nm） excitation, an intense NIR emission of Yb3＋ corresponding to tran- sition of 2Fs/2/5→2F7/2 peaking at 985 nm was generated. The visible emission, the NIR mission and the decay lifetime of the phosphors of various Yb3＋ concentrations were investigated. Experimental results showed that the energy transfer from vanadate group to Yb3＋ via Tm3＋ was very efficient. Application of the broadband DC YVO4：Tma＋,yb3＋ phosphors might greatly enhance response of sili- con-based solar cells.An efficient near-infrared （NIR） downconversion （DC） by converting broadband ultraviolet （UV） into NIR was demon- strated in YVO4：Tma＋,yb3＋ phosphors. The phosphors were extensively characterized using various methods such as X-ray diffrac- tion, photoluminescence excitation, photoluminescence spectra and decay lifetime to provide supporting evidence for DC process. Upon UV light varying from 260 to 350 nm or blue light （473 nm） excitation, an intense NIR emission of Yb3＋ corresponding to tran- sition of 2Fs/2/5→2F7/2 peaking at 985 nm was generated. The visible emission, the NIR mission and the decay lifetime of the phosphors of various Yb3＋ concentrations were investigated. Experimental results showed that the energy transfer from vanadate group to Yb3＋ via Tm3＋ was very efficient. Application of the broadband DC YVO4：Tma＋,yb3＋ phosphors might greatly enhance response of sili- con-based solar cells.

关 键 词：DOWNCONVERSION YVO4：Tm3＋ yb3＋ energy transfer rare earths 

分 类 号：O614.322[理学—无机化学]