Fast photovoltaic effects tuned by vicinal interface microstructure in manganite-based all-perovskite-oxide heterojunctions

Zhi-qing Lu; Hao Ni; Kun Zhao; Wen-xiu Leng; Yu-Chau Kong; Hong-Kuen Wong

doi:10.1364/AO.50.000G23

Fast photovoltaic effects tuned by vicinal interface microstructure in manganite-based all-perovskite-oxide heterojunctions

Appl Opt. 2011 Nov 1;50(31):G23-6. doi: 10.1364/AO.50.000G23.

Authors

Zhi-qing Lu¹, Hao Ni, Kun Zhao, Wen-xiu Leng, Yu-Chau Kong, Hong-Kuen Wong

Affiliation

¹ State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.

PMID: 22086042
DOI: 10.1364/AO.50.000G23

Abstract

Interfacial microstructure tunable photovoltaic effects have been reported in heterojunctions of La(1-x)Ca(x)MnO(3) thin films and tilted or exact cut Nb-doped SrTiO(3) single crystal substrates under irradiation of UV pulsed laser. The photoresponse times of vicinal junctions and films were obviously faster than those of exact cut samples. The behaviors can be explained by the slope of the built-in electric field in the 10° tilted heterojunction and the interfacial terrace microstructure of La(1-x)Ca(x)MnO(3) films.