Red Photoluminescence from Bi3+ and the Influence of the Oxygen-Vacancy Perturbation in ScVO4: A Combined Experimental and Theoretical Study
Red Photoluminescence from Bi3+ and the Influence of the Oxygen-Vacancy Perturbation in ScVO4: A Combined Experimental and Theoretical Study
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DOI：
10.1021/jp4081965
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发表时间：
2014-03
影响因子：
3.7
通讯作者：
Fengwen Kang;Xiao-Bao Yang;M. Peng;L. Wondraczek;Zhijun Ma;Qinyuan Zhang;J. Qiu
中科院分区：
文献类型：
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作者：
Fengwen Kang;Xiao-Bao Yang;M. Peng;L. Wondraczek;Zhijun Ma;Qinyuan Zhang;J. Qiu
我们报告了一种发红光的 ScVO4:Bi3+ 荧光粉，它在低于 2.88 eV (430 nm) 的能量下不显示激发。采用 X 射线衍射、时间分辨和定量光致发光 (PL) 光谱来表征材料的晶体结构和发光性能之间的关系。结果表明，Bi3+ 的掺入使空白 ScVO4 的蓝色光发射变为红色。 10 至 300 K 之间的动态发光分析揭示了从 VO43– 基团到 Bi3+ 离子的能量转移以及 Bi3+ 的 3P1 和 3P0 粒子群重新分布对温度的复杂依赖性。这反映了发光衰减函数的明显变化。也就是说，Bi3+发光寿命急剧减少，从数百微秒减少到仅几微秒。采用密度泛函理论揭示了不寻常的红色Bi3+发光是如何产生的，结果表明，铋沉淀成ScVO4时容易产生的氧空位的扰动是...
We report on a red-emitting ScVO4:Bi3+ phosphor which does not show excitation at energies below 2.88 eV (430 nm). X-ray diffraction, time-resolved, and quantitative photoluminescence (PL) spectroscopy were employed to characterize relations between crystal structure and luminescence properties of the material. Results show that incorporation of Bi3+ renders the blue photoemission of blank ScVO4 to red. Dynamic luminescence analysis between 10 and 300 K reveals a complicated dependence of energy transfer from VO43– groups to Bi3+ ions and population redistribution of 3P1 and 3P0 of Bi3+ on temperature. This reflects in distinct changes in the luminescence decay functions. That is, a dramatic decrease of Bi3+ luminescence lifetime occurs from hundreds to only several microseconds. Density functional theory is employed to reveal how the unusual red Bi3+ luminescence comes, and results indicate that the perturbation of oxygen vacancies which is generated readily when bismuth precipitates into ScVO4 is the re...