Effect of annealing atmosphere on microstructural and photoluminescence characteristics of multiferroic BiFeO3 thin films prepared by pulsed laser deposition technique

被引：52

作者：

Prashanthi, K. ^{[1
]}

Gupta, M. ^{[2
]}

Tsui, Y. Y. ^{[2
]}

Thundat, T. ^{[1
]}

机构：

[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB, Canada

[2] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB, Canada

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2013年 / 110卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

FERROELECTRIC BIFEO3; OPTICAL-PROPERTIES; CHEMICAL METHOD; NANOCRYSTALLINE; BULK;

D O I：

10.1007/s00339-012-7194-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of annealing atmosphere on microstructural and photoluminescence characteristics of multiferroic BiFeO3 (BFO) thin films deposited by pulsed laser deposition (PLD) technique is reported. The films annealed in oxygen environment showed improved microstructure and photoluminescence (PL) characteristics. The PL spectra of oxygen-annealed BFO thin films at room temperature show a strong emission in the blue region. A plot of (alpha E)(2) vs. photon energy (E) (alpha-absorption coefficient) and the linear extrapolation to (alpha E)(2)=0 indicates a direct gap at 2.69 +/- 0.02 eV, which is in agreement with the previous reports. The results obtained in this study are accordingly expected to facilitate the understanding and optimization of BFO thin films for photovoltaic applications.

引用

页码：903 / 907

页数：5

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