Effects of oxygen stoichiometry on the photovoltaic properties of La0.4Ca0.6MnO3-δ epitaxial films grown on miscut MgO substrates

Author

Yu, Daren ; Ni, Huijuan ; Zhao, Kai ; Zhao, S.Q. ; Da, S.L. ; Zhang, W.S. ; Yang, P.R. ; Kong, Y. ; Wong, H.K.

Author_Institution

Coll. of Sci., China Univ. of Pet., Beijing, China

Volume

2

fYear

2011

fDate

12-14 Aug. 2011

Firstpage

725

Lastpage

728

Abstract

We report the effects of lattice constants variation induced by oxygen stoichiometry on the photoresponse properties of La_0.4Ca_0.6MnO_3-δ epitaxial films grown on miscut MgO substrates. The oxygen content was changed by annealing the sample in oxygen and vacuum. With the decreases of oxygen deficiencies, the electrical conductivity and the diffraction peak [101] of the film increase. It is found that the photovoltage and photocurrent decrease monotonously as the oxygen contents decrease.

Keywords

annealing; calcium compounds; epitaxial layers; lanthanum compounds; lattice constants; photoconductivity; photovoltaic effects; stoichiometry; La_0.4Ca_0.6MnO_3-δ; MgO; annealing; electrical conductivity; epitaxial films; lattice constants; miscut substrates; oxygen stoichiometry effect; photocurrent; photoresponse properties; photovoltaic properties; Annealing; Diffraction; Films; Lattices; Photoconductivity; Substrates; Temperature measurement; annealing; manganite film; oxygen stoichiometry; photoresponse properties;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic and Mechanical Engineering and Information Technology (EMEIT), 2011 International Conference on

Conference_Location

Harbin, Heilongjiang, China

Print_ISBN

978-1-61284-087-1

Type

conf

DOI

10.1109/EMEIT.2011.6023151

Filename

6023151