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KLa(MoO4)2:Sm3+, Eu3+熒光粉中能量傳遞研究
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國(guó)家自然科學(xué)基金（11374044）；中央高?；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)基金（3132014327）


Energy Transfer in KLa(MoO4)2:Sm3+,Eu3+ Phosphors
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    摘要:

    采用高溫固相法合成了KLa0.7-x(MoO4)2:0.3Eu3+, xSm3+系列紅色發(fā)射熒光粉, 利用XRD對(duì)樣品的晶體結(jié)構(gòu)進(jìn)行了分析，發(fā)現(xiàn)所得到的樣品均為純相。采用熒光光譜手段對(duì)樣品的發(fā)光性質(zhì)及能量傳遞進(jìn)行了研究。在低Sm3+摻雜濃度時(shí)采用277及394 nm激發(fā)樣品，其發(fā)光強(qiáng)度幾乎不隨摻雜濃度變化，若利用404 nm激發(fā)樣品發(fā)光隨Sm3+濃度有明顯增強(qiáng)；當(dāng)Sm3+摻雜濃度較高時(shí)，利用277, 394及404 nm激發(fā)觀察到了Sm3+對(duì)Eu3+發(fā)光產(chǎn)生了猝滅作用。采用電多極相互作用模型及交換相互作用模型對(duì)Sm3+到Eu3+的能量傳遞過(guò)程的物理本質(zhì)進(jìn)行了探討，確定了在低摻雜濃度下Sm3+到Eu3+的能量傳遞是基于交換相互作用的結(jié)果。通過(guò)對(duì)Eu3+的5D0能級(jí)熒光動(dòng)力學(xué)過(guò)程的分析進(jìn)一步證實(shí)了在低Sm3+摻雜濃度時(shí)Sm3+充當(dāng)能量傳遞供體，而高摻雜濃度時(shí)Sm3+對(duì)Eu3+發(fā)光產(chǎn)生了猝滅作用

    Abstract:

    Red emitting phosphors KLa0.7-x(MoO4)2:0.3Eu3+, xSm3+ were synthesized by a solid-state reaction. Analysis on XRD patterns confirms that all the obtained phosphors exhibit pure phase. The luminescence properties and energy transfer behavior were studied via fluorescence spectral measurements. When the Sm3+ concentration is lower, the emission intensities under 277 and 394 nm excitations almost do not change with Sm3+ concentration, but effective luminescent enhancement is discovered in the samples with lower Sm3+ concentrations by 404 nm. However, Sm3+ doping quenches the emission of Eu3+ when the Sm3+ doping concentration is higher. The electric multipole interaction and exchange interaction models were adopted to explore physical nature for the energy transfer mechanism, and the exchange interaction between Sm3+ and Eu3+ is confirmed to be the right mechanism. It is found from the fluorescence decays that Sm3+ is the donor when the Sm3+ concentration is lower, but the Sm3+ doping quenches the luminescence of Eu3+ when the Sm3+ concentration is higher

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吳中立,張艷秋,陳寶玖. KLa(MoO4)2:Sm3+, Eu3+熒光粉中能量傳遞研究[J].稀有金屬材料與工程,2015,44(10):2476~2480.[Wu Zhongli, Zhang Yanqiu, Chen Baojiu. Energy Transfer in KLa(MoO4)2:Sm3+,Eu3+ Phosphors[J]. Rare Metal Materials and Engineering,2015,44(10):2476~2480.]
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  • 收稿日期:2014-09-30
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  • 在線發(fā)布日期: 2016-07-13
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