Photoluminescence of Tb3+/Ce3+ co-doped aluminum oxynitride powders
Photoluminescence of Tb3+/Ce3+ co-doped aluminum oxynitride powders
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DOI：
10.1016/j.matlet.2010.11.027
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发表时间：
2011-02
影响因子：
3
通讯作者：
Lianyun Deng;J. Lei;Ying Shi;Ting Lin;Yuying Ren;Jianjun Xie
中科院分区：
文献类型：
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作者：
Lianyun Deng;J. Lei;Ying Shi;Ting Lin;Yuying Ren;Jianjun Xie
以Al(NO3)3溶液和纳米炭黑为原料，在流动氮气气氛中氮化前驱体，在1750℃下氮化合成了Tb3+和Ce3+共掺杂的AlON荧光粉。制备的AlON基粉末由尺寸在1-3μm的多晶尖晶石型粒子组成，在275 nm的激发下，发现Ce3+的共掺杂可以通过能量转移显著增强AlON：Tb3+粉末的发光。Ce~(3+)和Tb~(3+)浓度分别为0.5mol%和0.67mol%时，产物在540 nm处有较强的宽绿色发射。确定了Tb3+在AlON：0.5mo1%Ce3+/xmo1%Tb3+荧光粉中的临界猝灭浓度为0.67mo1%。推测Tb~(3+)在AlON：0.5m ol%Ce~(3+)x~(3+)：Tb~(3+)荧光粉中的猝灭机理为偶极-偶极相互作用。
Aluminum oxynitride(AlON) phosphors co-doped by Tb3+and Ce3+were synthesized by nitridation of the precursor which was co-precipitated from Al(NO3)3solution and nanosized carbon black at 1750°C for 2"hrs" in flowing nitrogen atmosphere. The obtained AlON based powders were composed of polycrystalline spinel typed particles with sizes in the range of 1–3μm. Under an excitation of 275nm, it was found that co-doping of Ce3+could drastically enhance the luminescence of AlON:Tb3+powder by energy transfer. The product with 0.5mol% Ce3+and 0.67mol% Tb3+exhibited a strong broad green emission at 540nm. The critical quenching concentration of Tb3+in AlON:0.5mol% Ce3+/xmol% Tb3+phosphor was determined to be 0.67mol%. It was supposed that the mechanism of concentration quenching of Tb3+in AlON:0.5mol% Ce3+xmol% Tb3+phosphor was dipole–dipole interaction.