Influence of crystallisation on the photoluminescence properties of Y2-xErxTi2O7 sol-gel thin films

被引：20
作者：
Jenouvrier, P
Langlet, M
Rimet, R
Fick, J
机构：
[1] Ecole Natl Super Phys Grenoble, Mat & Genie Phys Lab, INPG, CNRS,UMR 5628, F-38402 St Martin Dheres, France
[2] ENSERG, Inst Microelect Electromagnetisme & Photon, UJF, INPG,CNRS,UMR 5130, F-38016 Grenoble, France
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2003年 / 77卷 / 05期
关键词：
D O I：
10.1007/s00339-002-1886-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Optically active Er2Ti2O7 (ETO) and Y2-xErxTi2O7 (YETO) films have been successfully deposited using the aerosol-gel process. Several heat-treatment procedures are investigated in the 600-850degreesC range. ETO and YETO films start to crystallise in the pyrochlore phase at about 750degreesC, depending on the heat-treatment time. Crystalline YETO films form a solid solution where the erbium ions are well diluted. Up-conversion emission (UPE) in the visible wavelength range and infrared photoluminescence (PL) at 1.53 mum are investigated. PL spectra are composed of several sharp peaks. Stark splitting of the I-4(13/2) and I-4(15/2) erbium levels is analysed. A clear correlation between spectroscopic properties and film microstructure is evidenced. YETO films exhibit strong PL compared to ETO films. PL lifetimes of up to 8.6 ms were measured on YETO films at an erbium concentration of 2x10(20) ions/cm(3). The YETO compound is found to be a suitable material, improving the erbium active properties.
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收藏
页码：687 / 692
页数：6
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