Spectroscopic and crystal field study of Sm3+ in different phases of TiO2

被引：27

作者：

Kiisk, V. ^{[1
]}

Reedo, V. ^{[1
]}

Karbowiak, M. ^{[2
]}

Brik, M. G. ^{[1
]}

Sildos, I. ^{[1
]}

机构：

[1] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia

[2] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2009年 / 42卷 / 12期

关键词：

STRENGTH; SPECTRA;

D O I：

10.1088/0022-3727/42/12/125107

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A systematic study of the photoluminescence spectra of samarium-doped crystalline TiO2 was conducted within the temperature range 10-300K in order to reveal the energy levels of the trivalent impurity ion in different phases of titania. The sol-gel route was used to prepare Sm-doped TiO2 powders. The nanocrystalline anatase phase was obtained by annealing up to 800 degrees C, whereas the rutile phase was developed by annealing above 1000 degrees C. Crystal field calculations of Sm3+ energy levels in the two phases of TiO2 (anatase and rutile) were performed for the first time. The obtained set of energy levels assuming positioning of the Sm3+ ions in regular TiO2 lattice sites was consistent with the experimental results. The effect of the different phases of titania on the impurity is discussed.

引用

页数：6

共 17 条

[1] A relationship for crystal field strength along the lanthanide series;: application to the prediction of the (2F7/2)Yb3+ maximum splitting [J].