Title :
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
Abstract :
We report the effects of lattice constants variation induced by oxygen stoichiometry on the photoresponse properties of La0.4Ca0.6MnO3-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; La0.4Ca0.6MnO3-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;
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
DOI :
10.1109/EMEIT.2011.6023151
