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Photoelectric Properties of Undoped and Fe-Doped LiNbO3 Films Made by Sol-Gel Method

Published online by Cambridge University Press:  25 February 2011

Chih-Hsing Cheng ,
Yuhuan Xu  and
John D. Mackenzie
Chih-Hsing Cheng
Affiliation:
Department of Materials Science and Engineering University of California, Los Angeles, CA 90024
Yuhuan Xu
Affiliation:
Department of Materials Science and Engineering University of California, Los Angeles, CA 90024
John D. Mackenzie
Affiliation:
Department of Materials Science and Engineering University of California, Los Angeles, CA 90024
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Abstract

Transparent lithium niobate (LiNbO3) with thickness from 0.1 - 1.2 μm were made on silicon, fused silica, and sapphire substrates by the sol-gel processing. Alkoxide solutions were used as starting materials. X-ray diffraction has been used to confirm the crystallization of the films. Refractive index, dielectric and ferroelectric properties of LiNbO3 films were studied. Absorption spectra of films of LiNbO3 and LiNbO3 with doping of different amount of Fe (0.1 - 2.5mol%) were measured. Short-circuit photocurrent measurements revealed both transient and steady state components attributed to a pyroelectric effect and a bulk photovoltaic effect respectively. Epitaxial growth of LiNbO3 thin film on sapphire(012) substrate by sol-gel method was also obtained.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 243: Symposium G – Ferroelectric Thin Films II , 1991 , 551
Copyright
Copyright © Materials Research Society 1992

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