Tb3+和Gd3+掺杂的纳米TiO2薄膜的制备及发光性能与发光机

Tb³⁺和Gd³⁺掺杂的纳米TiO₂薄膜的制备及发光性能与发光机

郭楠, 郭坤, 盛野, 邹海峰

吉林大学化学学院, 长春 130012

收稿日期:2008-04-18 修回日期:1900-01-01 出版日期:2009-03-26 发布日期:2009-03-26
通讯作者: 邹海峰

Optical Properties and Energy Transfer Mechanism of Tb³⁺/Gd³⁺Co-doped Nanometer TiO₂ Thin Film

GUO Nan, GUO Kun, SHENG Ye, ZOU Haifeng

College of Chemistry, Jilin University, Changchun 130012, China

Received:2008-04-18 Revised:1900-01-01 Online:2009-03-26 Published:2009-03-26
Contact: ZOU Haifeng

摘要/Abstract

摘要： 以钛酸正丁酯［Ti(OBu)₄］为前驱体, 采用溶胶凝胶法制备Tb³⁺和Gd³⁺共掺杂的纳米TiO₂发光薄膜, 并探讨了Gd³⁺对Tb³⁺的增敏作用机理. 通过X射线衍射(XRD)、 TG/DTA综合热分析仪、傅里叶变换红外仪(FTIR)、透射电子显微镜（TEM）和光致发光(PL)光谱分别对不同制备条件下的TiO₂薄膜进行了表征. 结果表明, TiO₂薄膜具有一定的择优取向, 晶相为锐钛矿相, 形成了良好有序的晶体结构, 且样品粒径分布均匀, 颗粒大小约为15 nm；以230 nm作为激发光, Gd³⁺的共掺对纳米TiO₂发光薄膜中Tb³⁺的发光有显著增强作用.

关键词: 二氧化钛, 光致发光, Tb³⁺/Gd³⁺, 能量传递

Abstract: Nanometer TiO₂ thin films were prepared by means of a sol-gel process with ［Ti(OBu)₄］ as the precursor and characterized by XRD, TG-DTA, TEM and PL spectra. XRD results show that the referentially oriented (101) anatase films were formed. TEM results show the TiO₂ grainsize distribution of the sample was even and its size was about 15 nm. At room temperature, the PL intensity was found to have a well matching relation to the doping concentration of Tb³⁺ ions. Luminescence intensity was improved obviously after co-dopingof Gd³⁺ ions because of the sensitization effect of Gd³⁺ ions to Tb³⁺ ions in TiO₂ system. The energy transfer mechanism from Gd³⁺ ions to Tb³⁺ ions was proposed.

Key words: titanium oxide, photoluminescence, Tb³⁺/Gd³⁺, energy transfer

中图分类号:

郭楠, 郭坤, 盛野, 邹海峰. Tb³⁺和Gd³⁺掺杂的纳米TiO₂薄膜的制备及发光性能与发光机[J]. J4, 2009, 47(02): 367-375.

GUO Nan, GUO Kun, SHENG Ye, ZOU Haifeng. Optical Properties and Energy Transfer Mechanism of Tb³⁺/Gd³⁺Co-doped Nanometer TiO₂ Thin Film[J]. J4, 2009, 47(02): 367-375.

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Tb³⁺和Gd³⁺掺杂的纳米TiO₂薄膜的制备及发光性能与发光机

Optical Properties and Energy Transfer Mechanism of Tb³⁺/Gd³⁺Co-doped Nanometer TiO₂ Thin Film

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