Transport and photoresponse properties in Pr0.5Ca0.5CoO3/Nb-SrTiO3 heterostructure

S. G. Zhao; A. Gu; X. L. Yan; L. M. Hao; Y. Xie; T. Zhang; K. X. Jin

doi:10.1209/0295-5075/108/67007

All issues

Volume 108 / No 6 (December 2014)

EPL, 108 6 (2014) 67007

Abstract

Issue		EPL Volume 108, Number 6, December 2014


Article Number		67007
Number of page(s)		6
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/108/67007
Published online		22 January 2015

EPL, 108 (2015) 67007

Transport and photoresponse properties in Pr_0.5Ca_0.5CoO₃/Nb-SrTiO₃ heterostructure

S. G. Zhao¹, A. Gu¹, X. L. Yan¹, L. M. Hao¹, Y. Xie¹, T. Zhang¹ and K. X. Jin²^(a)

¹ College of Science, Xi'an University of Science and Technology - Xi'an 710054, China
² Shaanxi Key Laboratory of Condensed Matter Structures and Properties, School of Science, Northwestern Polytechnical University - Xi'an 710072, China

^(a) jinkx@nwpu.edu.cn (corresponding author)

Received: 12 September 2014
Accepted: 2 December 2014

Abstract

Transport and photoresponse properties of the heterostructure consisting of a Pr_0.5Ca_0.5CoO₃ film and a Nb-SrTiO₃ substrate were investigated. The Pr_0.5Ca_0.5CoO₃ film exhibits semiconducting behavior and the resistances are decreased when irradiated by a 532 nm laser. The rectifying behaviors are observed in the heterostructure. The ideality factors and the diffusion voltages monotonically decrease with increasing the temperature. The photovoltatges of the heterostructure under the irradiation approach the saturation at about $8.5\ \text{mW/mm}^{2}$ . The minority carrier lifetime of $\tau_{p}=0.281\ \text{s}$ is estimated from the time response properties in the falling process of photovoltages. These results reveal that the Pr_0.5Ca_0.5CoO₃ heterostructures have great potentials in photoresponse and photoelectric conversion applications.

PACS: 72.40.+w – Photoconduction and photovoltaic effects / 73.40.Lq – Other semiconductor-to-semiconductor contacts, / 75.47.Lx – Magnetic oxides

© EPLA, 2014

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.