Synthesis and luminescent properties of Eu3+doped Y2WO6 nanophosphors
来源期刊：JOURNAL OF RARE EARTHS2013年第9期
论文作者：郝若男 孟庆裕 刘威 刘宏亮
文章页码：864 - 870
摘 要：Novel nanosized Y2 WO6 :Eu3+phosphors were synthesized via a co-precipitation reaction.The crystal structure of Y2 WO6 :Eu3+sample was monoclinic phase characterized by using X-ray diffraction（XRD）.The particle size was about 80 nm observed by field emission scanning electron microscopy（FE-SEM）.The photoluminescence properties of Y2 WO6 :Eu3+nanophosphors were studied.The results indicated that Eu3+ 5D0 →7F2 red luminescence at 611 nm could be effectively excited by 394 nm near-UV light and 465 nm blue light in Y2 WO6 host.The luminescence intensity was the strongest while the Eu3+doping concentration was 20%.And the chromaticity coordinates of this concentration is（0.651,0.348）.The energy transfer type between the Eu3+ was determined to be the exchange interaction and the critical energy transfer distance（Dc） was calculated to be about 0.81 angstrom.The J-O parameters,quantum efficiencies of Eu3+ 5D0 energy level and Huang-Rhys factor of Y2 WO6 :Eu3+nanophosphors were calculated.The calculated values indicated that Y2 WO6 :Eu3+had a high capacity for activators and the electron-phonon coupling was weak.Therefore,the Y2 WO6 : Eu3+nanophosphor is a nice red luminescent material and it may have a potential application in white LED.
郝若男，孟庆裕，刘威，刘宏亮
Key Laboratory for Photonic and Electronic Bandgap Materials,Ministry of Education,School of Physics & Electronic Engineering,Harbin Normal University
摘 要：Novel nanosized Y2 WO6 :Eu3+phosphors were synthesized via a co-precipitation reaction.The crystal structure of Y2 WO6 :Eu3+sample was monoclinic phase characterized by using X-ray diffraction（XRD）.The particle size was about 80 nm observed by field emission scanning electron microscopy（FE-SEM）.The photoluminescence properties of Y2 WO6 :Eu3+nanophosphors were studied.The results indicated that Eu3+ 5D0 →7F2 red luminescence at 611 nm could be effectively excited by 394 nm near-UV light and 465 nm blue light in Y2 WO6 host.The luminescence intensity was the strongest while the Eu3+doping concentration was 20%.And the chromaticity coordinates of this concentration is（0.651,0.348）.The energy transfer type between the Eu3+ was determined to be the exchange interaction and the critical energy transfer distance（Dc） was calculated to be about 0.81 angstrom.The J-O parameters,quantum efficiencies of Eu3+ 5D0 energy level and Huang-Rhys factor of Y2 WO6 :Eu3+nanophosphors were calculated.The calculated values indicated that Y2 WO6 :Eu3+had a high capacity for activators and the electron-phonon coupling was weak.Therefore,the Y2 WO6 : Eu3+nanophosphor is a nice red luminescent material and it may have a potential application in white LED.
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