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LaMgAl11O19: Mn2+和LaMgAl11O19:RE, Mn2+(RE=Eu2+, Gd3+)的發(fā)光特性
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Luminescence Properties of LaMgAl11O19:Mn2+ and LaMgAl11O19: RE, Mn2+(RE=Eu2+, Gd3+) under UV/VUV Excitation
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Natural Science Foundation of Gansu Province of China (3ZS051-A25-055)

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    摘要:

    以H3BO3作助熔劑，用高溫固相法在1150 ℃、保溫4 h的條件下成功制備了LaMgAl11O19:Mn的單相粉末樣品并研究了其真空紫外光激發(fā)下的一系列發(fā)光特性。在紫外光(254 nm)激發(fā)下，LaMgAl11O19: Mn不發(fā)光；真空紫外光(147 nm)激發(fā)下，觀察到Mn2+很強(qiáng)的3d5→3d44s的躍遷發(fā)光，峰值位于516 nm，結(jié)果表明，Mn2+的摻雜濃度在0.05 mol/mol時(shí)發(fā)光最強(qiáng)。為了繼續(xù)增強(qiáng)LaMgAl11O19中Mn2+的發(fā)光強(qiáng)度，在固定Mn2+的濃度為0.05 mol/mol的

    Abstract:

    Using H3BO3 as a flux, LaMgAl11O19:Mn2+ and LaMgAl11O19:RE, Mn2+(RE=Eu2+, Gd3+) were synthesized by solid state reaction at 1150 ℃ for 4 h. The effect of Mn2+ on the luminescent properties excited by vacuum ultraviolet (VUV) was investigated. The strong emission spectrum excited by 147 nm is composed of peaks from Eu2+ and Mn2+ luminescence in LaMgAl11O19:(Eu2+, Mn2+ ) and only Mn2+ luminescence in LaMgAl11O19:Mn2+ and LaMgAl11O19:(Gd3+, Mn2+). The results show that the green emission of Mn2+ becomes stronger because of efficient energy transferring from Eu2+ and Gd3+ to Mn2+

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王博宇,徐進(jìn)章,陳 昊,張志華. LaMgAl11O19: Mn2+和LaMgAl11O19:RE, Mn2+(RE=Eu2+, Gd3+)的發(fā)光特性[J].稀有金屬材料與工程,2009,38(3):389~392.[Wang Boyu, Xu Jinzhang, Chen Hao, Zhang Zhihua. Luminescence Properties of LaMgAl11O19:Mn2+ and LaMgAl11O19: RE, Mn2+(RE=Eu2+, Gd3+) under UV/VUV Excitation[J]. Rare Metal Materials and Engineering,2009,38(3):389~392.]
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  • 收稿日期:2008-02-11
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