Self-powered sensitive and stable UV-visible photodetector based on GdNiO3/Nb-doped SrTiO3 heterojunctions

Junling Wang; Le Wang; Lei Chang; Xinmao Yin; Lu You; Jia-Li Zhao; Haizhong Guo; Kuijuan Jin; Kurash Ibrahim; Jiaou Wang; Andrivo Rusydi

doi:10.1063/1.4974144

Self-powered sensitive and stable UV-visible photodetector based on GdNiO₃/Nb-doped SrTiO₃ heterojunctions

Junling Wang^*, Le Wang, Lei Chang, Xinmao Yin, Lu You, Jia-Li Zhao, Haizhong Guo, Kuijuan Jin, Kurash Ibrahim, Jiaou Wang, Andrivo Rusydi

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

43 Citations (Scopus)

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. © 2017 Author(s).

Original language	English
Article number	043504
Journal	Applied Physics Letters
Volume	110
Issue number	4
DOIs	https://doi.org/10.1063/1.4974144
Publication status	Published - 23 Jan 2017
Externally published	Yes

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title = "Self-powered sensitive and stable UV-visible photodetector based on GdNiO3/Nb-doped SrTiO3 heterojunctions",

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. {\textcopyright} 2017 Author(s).",

author = "Junling Wang and Le Wang and Lei Chang and Xinmao Yin and Lu You and Jia-Li Zhao and Haizhong Guo and Kuijuan Jin and Kurash Ibrahim and Jiaou Wang and Andrivo Rusydi",

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T1 - Self-powered sensitive and stable UV-visible photodetector based on GdNiO3/Nb-doped SrTiO3 heterojunctions

AU - Wang, Junling

AU - Wang, Le

AU - Chang, Lei

AU - Yin, Xinmao

AU - You, Lu

AU - Zhao, Jia-Li

AU - Guo, Haizhong

AU - Jin, Kuijuan

AU - Ibrahim, Kurash

AU - Wang, Jiaou

AU - Rusydi, Andrivo

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2017/1/23

Y1 - 2017/1/23

N2 - 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. © 2017 Author(s).

AB - 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. © 2017 Author(s).

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