Temperature dependence of optical band gap in ferroelectric Bi3.25 La0.75 Ti3 O12 films determined by ultraviolet transmittance measurements

Z. G. Hu; Y. W. Li; F. Y. Yue; Z. Q. Zhu; J. H. Chu

doi:10.1063/1.2816915

Temperature dependence of optical band gap in ferroelectric Bi3.25 La0.75 Ti3 O12 films determined by ultraviolet transmittance measurements

Z. G. Hu^*
, Y. W. Li
, F. Y. Yue
, Z. Q. Zhu
, J. H. Chu

^*Corresponding author for this work

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Optical properties of ferroelectric Bi3.25 La0.75 Ti3 O12 (BLT) films on quartz have been investigated using ultraviolet-infrared transmittance spectra in the temperature range of 77-500 K. The spectra can be divided into three distinctive photon regions between 1.1 and 6.5 eV. It is found that the band gap Eg decreases from 3.88 to 3.77 eV with the temperature. The parameters aB and B of the Bose-Einstein model are 30.3 meV and 218.7 K, respectively. The band narrowing coefficient d Eg dT is -2.65× 10-4 eVK at room temperature. The present results can be crucial for future application of ferroelectric BLT-based electro-optic and high temperature optoelectronic devices.

Original language	English
Article number	221903
Journal	Applied Physics Letters
Volume	91
Issue number	22
DOIs	https://doi.org/10.1063/1.2816915
State	Published - 2007

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@article{00f2b51f92b7457cbef5ca2d7465c092,

title = "Temperature dependence of optical band gap in ferroelectric Bi3.25 La0.75 Ti3 O12 films determined by ultraviolet transmittance measurements",

abstract = "Optical properties of ferroelectric Bi3.25 La0.75 Ti3 O12 (BLT) films on quartz have been investigated using ultraviolet-infrared transmittance spectra in the temperature range of 77-500 K. The spectra can be divided into three distinctive photon regions between 1.1 and 6.5 eV. It is found that the band gap Eg decreases from 3.88 to 3.77 eV with the temperature. The parameters aB and B of the Bose-Einstein model are 30.3 meV and 218.7 K, respectively. The band narrowing coefficient d Eg dT is -2.65× 10-4 eVK at room temperature. The present results can be crucial for future application of ferroelectric BLT-based electro-optic and high temperature optoelectronic devices.",

author = "Hu, \{Z. G.\} and Li, \{Y. W.\} and Yue, \{F. Y.\} and Zhu, \{Z. Q.\} and Chu, \{J. H.\}",

year = "2007",

doi = "10.1063/1.2816915",

language = "英语",

volume = "91",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "22",

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TY - JOUR

T1 - Temperature dependence of optical band gap in ferroelectric Bi3.25 La0.75 Ti3 O12 films determined by ultraviolet transmittance measurements

AU - Hu, Z. G.

AU - Li, Y. W.

AU - Yue, F. Y.

AU - Zhu, Z. Q.

AU - Chu, J. H.

PY - 2007

Y1 - 2007

N2 - Optical properties of ferroelectric Bi3.25 La0.75 Ti3 O12 (BLT) films on quartz have been investigated using ultraviolet-infrared transmittance spectra in the temperature range of 77-500 K. The spectra can be divided into three distinctive photon regions between 1.1 and 6.5 eV. It is found that the band gap Eg decreases from 3.88 to 3.77 eV with the temperature. The parameters aB and B of the Bose-Einstein model are 30.3 meV and 218.7 K, respectively. The band narrowing coefficient d Eg dT is -2.65× 10-4 eVK at room temperature. The present results can be crucial for future application of ferroelectric BLT-based electro-optic and high temperature optoelectronic devices.

AB - Optical properties of ferroelectric Bi3.25 La0.75 Ti3 O12 (BLT) films on quartz have been investigated using ultraviolet-infrared transmittance spectra in the temperature range of 77-500 K. The spectra can be divided into three distinctive photon regions between 1.1 and 6.5 eV. It is found that the band gap Eg decreases from 3.88 to 3.77 eV with the temperature. The parameters aB and B of the Bose-Einstein model are 30.3 meV and 218.7 K, respectively. The band narrowing coefficient d Eg dT is -2.65× 10-4 eVK at room temperature. The present results can be crucial for future application of ferroelectric BLT-based electro-optic and high temperature optoelectronic devices.

UR - https://www.scopus.com/pages/publications/36549058649

U2 - 10.1063/1.2816915

DO - 10.1063/1.2816915

M3 - 文章

AN - SCOPUS:36549058649

SN - 0003-6951

VL - 91

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 22

M1 - 221903

ER -

Temperature dependence of optical band gap in ferroelectric Bi3.25 La0.75 Ti3 O12 films determined by ultraviolet transmittance measurements

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