Electronic transport and photovoltaic properties in Bi2Sr2Co2Oyepitaxial heterostructures

Hai-Zhong Guo; Lin Gu; Zhen-Zhong Yang; Shu-Fang Wang; Guang-Sheng Fu; Le Wang; Kui-Juan Jin; Hui-Bin Lu; Can Wang; Chen Ge; Meng He; Guo-Zhen Yang

doi:10.1209/0295-5075/103/47006

All issues

Volume 103 / No 4 (August 2013)

EPL, 103 4 (2013) 47006

Abstract

Issue		EPL Volume 103, Number 4, August 2013


Article Number		47006
Number of page(s)		5
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/103/47006
Published online		16 September 2013

EPL, 103 (2013) 47006

Electronic transport and photovoltaic properties in Bi₂Sr₂Co₂O_yepitaxial heterostructures

Hai-Zhong Guo¹, Lin Gu¹, Zhen-Zhong Yang¹, Shu-Fang Wang²^(a), Guang-Sheng Fu², Le Wang¹, Kui-Juan Jin¹^(b), Hui-Bin Lu¹, Can Wang¹, Chen Ge¹, Meng He¹ and Guo-Zhen Yang¹

¹ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences Beijing 100190, PRC
² College of Physics Science and Technology, Hebei University - Baoding 071002, PRC

^(a) swang2008@hotmail.com
^(b) Kjjin@iphy.ac.cn

Received: 19 June 2013
Accepted: 21 August 2013

Abstract

Epitaxial heterostructures constructed from the thermoelectric cobalt Bi₂Sr₂Co₂O_y thin films and SrTiO₃ as well as SrTi_0.993Nb_0.007O₃ substrates were fabricated by pulsed-laser deposition. The scanning transmission electron microscopy results confirm that the heterostructures are epitaxial, with sharp and coherent interfaces. The temperature-dependent electrical transport properties and the Hall effects were systematically investigated. The Bi₂Sr₂Co₂O_y/SrTi_0.993Nb_0.007O₃ p-n heterostructure exhibits good rectifying current-voltage characteristics over a wide temperature range. A strong photovoltaic effect was observed in the Bi₂Sr₂Co₂O_y/SrTi_0.993Nb_0.007O₃ heterostructure, with the temperature-dependent photovoltage being systematically investigated. The present work shows a great potential of this new heterostructures as photoelectric devices.

PACS: 73.40.Lq – Other semiconductor-to-semiconductor contacts, / 73.40.-c – Electronic transport in interface structures / 72.40.+w – Photoconduction and photovoltaic effects

© EPLA, 2013

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