化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (1) : 131-134. DOI: 10.19817/j.cnki.issn 1006-3536.2021.01.029

科学研究

TiO₂∶Eu³⁺荧光粉的发光性能及其能量传递

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Luminescence and energy transfer of TiO₂∶Eu³⁺ phosphor

Guo Jian, Xiao Linjiu, Li Wenze, Li Qiaoyun

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Received		Published
2019-10-08		2021-01-20
Issue Date	Revised Date
2021-01-27	2019-10-08

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摘要

以Eu(NO₃)₃·6H₂O为铕源,采用溶胶-凝胶法制备了TiO₂∶Eu³⁺荧光粉,研究了Eu³⁺离子掺杂量对TiO₂基质物相、发光性能的影响,进一步探讨了TiO₂基质与Eu³⁺离子的能量传递机理,利用X射线衍射(XRD)、荧光光谱、荧光寿命衰减曲线进行表征。结果表明:样品为锐钛矿结构,在395nm、465nm波长激发下,发射主峰在615nm处,与Eu³⁺的⁵D₀→⁷F₂电偶极跃迁相对应,可用于红光荧光粉。TiO₂基质到Eu³⁺离子的能量传递可通过氧空位缺陷作为能量捕获中心实现能量转移,增强Eu³⁺离子的发光。所制备的TiO₂∶Eu³⁺荧光粉可用于硅太阳能电池。

Abstract

TiO₂∶Eu³⁺ phosphors were prepared by sol-gel method with Eu(NO₃)₃·6H₂O as the source.The effect of Eu³⁺ ion doping amount on the phase and luminescence properties of TiO₂ matrix was studied.The TiO₂ matrix was further discussed.The energy transfer mechanism of Eu³⁺ ions was characterized by X-ray diffraction (XRD),fluorescence spectra,and fluorescence lifetime decay curves.The results shown that the sample was anatase.Under the excitation of 395nm and 465nm,the main emission peak was at 615nm,which corresponded to the ⁵D₀→⁷F₂ electric dipole transition of Eu³⁺,which can be used for red phosphor.The energy transfer from the TiO₂ matrix to the Eu³⁺ ions can achieve energy transfer through oxygen vacancy defects as an energy capture center,enhancing the luminescence of Eu³⁺ ions.The prepared TiO₂∶Eu³⁺ phosphor can be used for a silicon solar cell.

关键词

溶胶-凝胶法 / 红光荧光粉 / 氧空位 / 能量传递

Key words

sol-gel method / red phosphor / oxygen vacancy / energy transfer

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TiO₂∶Eu³⁺荧光粉的发光性能及其能量传递[J]. 化工新型材料, 2021, 49(1): 131-134 DOI:10.19817/j.cnki.issn 1006-3536.2021.01.029

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基金资助

辽宁省教育厅基金项目(2009S01)

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