Influence of temperature annealing on optical properties of SrTiO3/BaTiO3 multilayered films on indium tin oxide

被引：38
作者：
Supasai, T. [1 ]
Dangtip, S. [2 ,3 ]
Learngarunsri, P. [2 ,3 ]
Boonyopakorn, N. [2 ,3 ]
Wisitsoraat, A. [4 ]
Hodak, Satreerat K. [1 ,5 ]
机构：
[1] Chulalongkorn Univ, Dept Phys, Fac Sci, Bangkok 10330, Thailand
[2] Mahidol Univ, Fac Sci, Dept Phys, Bangkok 10400, Thailand
[3] Mahidol Univ, Fac Sci, NANOTEC COE, Bangkok 10400, Thailand
[4] Natl Elect & Comp Technol Ctr NECTEC, Nanoelect & MEMS Lab, Taipei 12120, Taiwan
[5] Chulalongkorn Univ, Ctr Innovat Nanotechnol, Bangkok 10330, Thailand
来源：
APPLIED SURFACE SCIENCE | 2010年 / 256卷 / 14期
关键词：
Perovskites; Optical properties; Multilayers; Annealing; Sol-gel; TITANATE THIN-FILMS; PULSED-LASER DEPOSITION; DIELECTRIC-PROPERTIES; ELECTRICAL-PROPERTIES; BAND-GAP; BATIO3; SRTIO3; MICROSTRUCTURE; SUBSTRATE; SUPERLATTICES;
D O I：
10.1016/j.apsusc.2010.01.072
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We have prepared SrTiO3/BaTiO3 thin films with multilayered structures deposited on indium tin oxide (ITO) coated glass by a sol-gel deposition and heating at 300-650 degrees C. The optical properties were obtained by UV-vis spectroscopy. The films show a high transmittance (approximately 85%) in the visible region. The optical band gap of the films is tunable in the 3.64-4.19 eV range by varying the annealing temperature. An abrupt decrease towards the bulk band gap value is observed at annealing temperatures above 600 degrees C. The multilayered film annealed at 650 degrees C exhibited the maximum refractive index of 2.09-1.91 in the 450-750 nm wavelength range. The XRD and AFM results indicate that the films annealed above 600 degrees C are substantially more crystalline than the films prepared at lower temperatures which were used to change their optical band gap and complex refractive index to an extent that depended on the annealing temperature. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：4462 / 4467
页数：6
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