Temperature-dependent rectifying and photovoltaic characteristics of an oxygen-deficient Bi2Sr2Co2Oy/Si heterojunction

doi:10.1088/1674-1056/22/10/107301

Abstract A Bi₂Sr₂Co₂O_y/Si heterojunction is obtained by growing a layer of p-type oxygen-deficient Bi₂Sr₂Co₂O_y film on a commercial n-type silicon wafer by pulsed laser deposition. Its rectifying and photovoltaic properties are studied in a wide temperature range from 20 K to 300 K. The transport mechanism under the forward bias can be attributed to a trap-filled space-charge-limited current conduction mechanism. Under the irradiation of a 532-nm continuous wave laser, a clear photovoltaic effect is observed and the magnitude of photovoltage increases as the temperature decreases. The results demonstrate the potential application of a Bi₂Sr₂Co₂O_y-based heterojunction in the photoelectronic devices.

Keywords: Bi₂Sr₂Co₂O_y/Si heterojunction rectifying characteristics photovoltaic effect space-charge-limited current

Received: 24 March 2013
Revised: 12 April 2013
Accepted manuscript online:

PACS:	73.40.Lq	(Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
	73.50.Pz	(Photoconduction and photovoltaic effects)
	73.61.-r	(Electrical properties of specific thin films)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CB612305), the National Natural Science Foundation of China (Grant No. 51372064), the One Hundred Persons Project of Hebei Province of China (Grant No. CPRC001), and the Science and Technology Research Project of Colleges and Universities in Hebei Province, China (Grant No. QN20131040).

Corresponding Authors: Fu Guang-Sheng, Wang Shu-Fang
E-mail: fugs@hbu.edu.cn;swang2008@hotmail.com

Cite this article:

Yan Guo-Ying (闫国英), Bai Zi-Long (白子龙), Li Hui-Ling (李慧玲), Fu Guang-Sheng (傅广生), Liu Fu-Qiang (刘富强), Yu Wei (于威), Wang Jiang-Long (王江龙), Wang Shu-Fang (王淑芳) Temperature-dependent rectifying and photovoltaic characteristics of an oxygen-deficient Bi₂Sr₂Co₂O_y/Si heterojunction 2013 Chin. Phys. B 22 107301

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Temperature-dependent rectifying and photovoltaic characteristics of an oxygen-deficient Bi2Sr2Co2Oy/Si heterojunction

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Temperature-dependent rectifying and photovoltaic characteristics of an oxygen-deficient Bi₂Sr₂Co₂O_y/Si heterojunction