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- W2390547959 abstract "In the present paper,a novel nanophosphor,Y10W2O21∶Eu was synthesized through a simple and low-cost method:co-precipitation.The results of XRD show that resultant samples are Orthorhombic phase and primitive lattice.The averagecrystallographic sizes could be confirmed to be approximately 80nm by means of the Scherrer formula,which are in good agree-ment with the particles sizes exhibited by SEM.In the excitation spectra of Y10W2O21∶Eu nanophosphor,by monitoring 610nm,the charge transfer bands(CTB)of O—Eu and O—W,centering at around 270and 307nm,can be observed,respectively.The spectral lines shape and locations of excitation peak corresponding to 4f→4ftransitions are similar in all samples.But therelative intensity ratios between O—Eu and O—W CTB excitation peak increase with the Eu3+doping concentration increasing.The characteristic red emission at around 610nm of Eu3+ was also observed,ascribed to the 5 D0→7 F2transition of Eu3+,andthe optimal doping concentration is 20mol%.Finally,the transition intensity parametersΩλ(λ=2,4)and the quantum efficien-cies of 5 D0level of Eu3+ were calculated according to Judd-Ofelt theory.The results indicate that Eu3+5 D0→7 F2610nm red lu-minescence can be effectively excited by 394nm near-UV light and 464nm blue light in Y10W2O21host,which is similar to thefamiliar Eu3+doped tungstate(e.g.Gd2(WO4)3,CaWO4).Therefore,the Y10W2O21∶Eu red nanophosphors may have a po-tential application for white LED." @default.
- W2390547959 created "2016-06-24" @default.
- W2390547959 creator A5006045497 @default.
- W2390547959 date "2011-01-01" @default.
- W2390547959 modified "2023-09-28" @default.
- W2390547959 title "Synthesis and Luminescence Properties of Y_(10)W_2O_(21):Eu Nanophosphor" @default.
- W2390547959 hasPublicationYear "2011" @default.
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