Wireless InGaN-Si/Pt device for photo-electrochemical water splitting

Takeyuki Sekimoto; Hiroshi Hashiba; Shuichi Shinagawa; Yusuke Uetake; Masahiro Deguchi; Satoshi Yotsuhashi; Kazuhiro Ohkawa

doi:10.7567/JJAP.55.088004

Wireless InGaN-Si/Pt device for photo-electrochemical water splitting

Takeyuki Sekimoto, Hiroshi Hashiba, Shuichi Shinagawa, Yusuke Uetake, Masahiro Deguchi, Satoshi Yotsuhashi, Kazuhiro Ohkawa

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

We demonstrate a wireless device comprising a gallium nitride (GaN)-silicon-based photo-electrode, and a platinum cathode. Compared with conventional two-electrode photo-electrochemical systems, this wireless monolithic device showed potential for a wider range of applications, and reduced the resistance losses resulting from the wiring and aqueous solution. The efficiency was improved when the electrolyte was changed from KHCO₃ to NaOH because water oxidation capability of the surface of the GaN was enhanced. A wider solar spectrum wavelength range was exploited by adopting InGaN as a photo-absorption layer; the improved efficiency for hydrogen generation was 0.90%.

Original language	English (US)
Article number	088004
Journal	Japanese Journal of Applied Physics
Volume	55
Issue number	8
DOIs	https://doi.org/10.7567/JJAP.55.088004
State	Published - Aug 2016
Externally published	Yes

ASJC Scopus subject areas

General Engineering
General Physics and Astronomy

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10.7567/JJAP.55.088004

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title = "Wireless InGaN-Si/Pt device for photo-electrochemical water splitting",

abstract = "We demonstrate a wireless device comprising a gallium nitride (GaN)-silicon-based photo-electrode, and a platinum cathode. Compared with conventional two-electrode photo-electrochemical systems, this wireless monolithic device showed potential for a wider range of applications, and reduced the resistance losses resulting from the wiring and aqueous solution. The efficiency was improved when the electrolyte was changed from KHCO3 to NaOH because water oxidation capability of the surface of the GaN was enhanced. A wider solar spectrum wavelength range was exploited by adopting InGaN as a photo-absorption layer; the improved efficiency for hydrogen generation was 0.90%.",

author = "Takeyuki Sekimoto and Hiroshi Hashiba and Shuichi Shinagawa and Yusuke Uetake and Masahiro Deguchi and Satoshi Yotsuhashi and Kazuhiro Ohkawa",

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AU - Sekimoto, Takeyuki

AU - Hashiba, Hiroshi

AU - Shinagawa, Shuichi

AU - Uetake, Yusuke

AU - Deguchi, Masahiro

AU - Yotsuhashi, Satoshi

AU - Ohkawa, Kazuhiro

PY - 2016/8

Y1 - 2016/8

N2 - We demonstrate a wireless device comprising a gallium nitride (GaN)-silicon-based photo-electrode, and a platinum cathode. Compared with conventional two-electrode photo-electrochemical systems, this wireless monolithic device showed potential for a wider range of applications, and reduced the resistance losses resulting from the wiring and aqueous solution. The efficiency was improved when the electrolyte was changed from KHCO3 to NaOH because water oxidation capability of the surface of the GaN was enhanced. A wider solar spectrum wavelength range was exploited by adopting InGaN as a photo-absorption layer; the improved efficiency for hydrogen generation was 0.90%.

AB - We demonstrate a wireless device comprising a gallium nitride (GaN)-silicon-based photo-electrode, and a platinum cathode. Compared with conventional two-electrode photo-electrochemical systems, this wireless monolithic device showed potential for a wider range of applications, and reduced the resistance losses resulting from the wiring and aqueous solution. The efficiency was improved when the electrolyte was changed from KHCO3 to NaOH because water oxidation capability of the surface of the GaN was enhanced. A wider solar spectrum wavelength range was exploited by adopting InGaN as a photo-absorption layer; the improved efficiency for hydrogen generation was 0.90%.

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JF - Japanese Journal of Applied Physics

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Wireless InGaN-Si/Pt device for photo-electrochemical water splitting

Abstract

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