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Title: Self-powered sensitive and stable UV-visible photodetector based on GdNiO3/Nb-doped SrTiO3 heterojunctions
Authors: Wang, Le
Chang, Lei
Yin, Xinmao
You, Lu
Zhao, Jia-Li
Guo, Haizhong
Jin, Kuijuan
Ibrahim, Kurash
Wang, Jiaou
Rusydi, Andrivo
Wang, Junling
Keywords: Nickel
Ultraviolet light
Issue Date: 2017
Source: Wang, L., Chang, L., Yin, X., You, L., Zhao, J.-L., Guo, H., et al. (2017). Self-powered sensitive and stable UV-visible photodetector based on GdNiO3/Nb-doped SrTiO3 heterojunctions. Applied Physics Letters, 110(4), 043504-.
Series/Report no.: Applied Physics Letters
Abstract: The properties of perovskite nickelates are very sensitive to their oxygen content, which allows us to tune their electronic structures by varying the oxygen partial pressure during film deposition. Under the optimized condition, we have obtained GdNiO3 films that are sensitive to a wide spectrum of light. By combining the GdNiO3 film with Nb-doped SrTiO3 to form a heterojunction, we design a self-powered photodetector with high sensitivity toward light with a wavelength between 650 nm and 365 nm. Under 365 nm illumination (50 μW/cm2), the device shows a responsivity of 0.23 A/W at 0 V bias, comparable to or even better than the ultraviolet photodetectors made of semiconductor materials such as GaN or ZnO. The photo-dark ratio can be close to 103 when the power light density reaches 0.6 mW/cm2. Moreover, the device performance is very stable without any decay after 6 months.
ISSN: 0003-6951
DOI: 10.1063/1.4974144
Schools: School of Materials Science & Engineering 
Rights: © 2017 American Institute of Physics (AIP). This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics (AIP). The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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