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溶劑熱-溶膠凝膠兩步法合成(Y,Gd)(P,V)O4: Eu3+,Bi3+熒光粉及其發(fā)光研究
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國(guó)家自然科學(xué)基金 (51302330); 重慶市高校微納米材料工程與技術(shù)重點(diǎn)實(shí)驗(yàn)室開放課題 (KFJJ1302)


Solvent Thermal-Sol Gel Synthesis and Luminescence Properties of (Y,Gd)(P,V)O4:Eu3+,Bi3+ Phosphors
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    摘要:

    采用溶劑熱-溶膠凝膠兩步法合成了(Y1-z,Gdz)1-x-y(Pz,V1-z)O4: xEu3+,yBi3+系列紅色熒光粉。用XRD、SEM和熒光分光光度計(jì),對(duì)試樣的晶體結(jié)構(gòu)、表面形貌及發(fā)光性能進(jìn)行了表征。結(jié)果表明:樣品為四方晶系,摻雜離子的加入對(duì)基質(zhì)晶體結(jié)構(gòu)影響不大;樣品形貌均一,呈短桿狀或橢圓狀;激發(fā)光譜由位于250~400 nm的O2--V5+帶和Eu3+-O2-帶組成;最強(qiáng)發(fā)射峰位于619 nm,歸屬于Eu3+的5D0→7F2特征躍遷發(fā)射;Eu3+的最佳摻雜量為5 mol% (x=0.05);摻雜Bi3+、Gd3+、P5+后,樣品發(fā)射強(qiáng)度得到顯著提高,Bi3+的摻雜還會(huì)使激發(fā)帶紅移至400 nm。說明這類熒光粉是可用于近紫外芯片激發(fā)的白光LED用紅色熒光粉

    Abstract:

    A series of (Y1-z,Gdz)1-x-y(Pz,V1-z)O4: xEu3+,yBi3+ red phosphors have been synthesized by a solvent thermal-sol gel method. The crystal structure, surface morphology and spectral characteristics of the samples were investigated by X-ray diffraction (XRD), SEM and fluorescence spectrophotometer, respectively. It is found that the synthesized crystalline powders are of tetragonal system. The doped ions have little impact on the matrix crystal structure. The sample grains show short rods or elliptical and the structure is uniform and loose. The excitation spectrum is composed of the broadband in 250~400 nm (O2--V5+ band and Eu3+-O2- band). The strongest emission peak locates at 619 nm(Eu3+: 5D0→7F2). The best doping amount of Eu3+ is 5 mol% and the excess concentration will lead to concentration quenching. The co-doping of Bi3+, Gd3+ and P5+ can improve the luminous intensity of the samples significantly. The doping of Bi3+ can make the excitation band move to near 400 nm, indicating samples can match with the N-UV chips and then be used in white-LEDs

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蒲 勇,劉碧桃,朱達(dá)川,彭玲玲,韓 濤,于 泓.溶劑熱-溶膠凝膠兩步法合成(Y, Gd)(P, V)O4: Eu3+,Bi3+熒光粉及其發(fā)光研究[J].稀有金屬材料與工程,2015,44(10):2529~2533.[Pu Yong, Liu Bitao, Zhu Dachuan, Peng Lingling, Han Tao, Yu Hong. Solvent Thermal-Sol Gel Synthesis and Luminescence Properties of (Y, Gd)(P, V)O4:Eu3+,Bi3+ Phosphors[J]. Rare Metal Materials and Engineering,2015,44(10):2529~2533.]
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  • 收稿日期:2014-10-15
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  • 在線發(fā)布日期: 2016-07-13
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