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Proceedings Paper

III-V nitride semiconductors for solar hydrogen production
Author(s): Vijay Parameshwaran; Chad Gallinat; Ryan W. Enck; Anand V. Sampath; Paul H. Shen; Tevye Kuykendall; Shaul Aloni; Michael Wraback; Bruce M. Clemens
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Paper Abstract

Photoelectrochemical cells are devices that can convert solar radiation to hydrogen gas through a water decomposition process. In this process, energy is converted from incident photons to the bonds of the generated H2 molecules. The solar radiation absorption, electron-hole pair splitting, and photoelectrolysis half reactions all occur in the vicinity of the electrode-electrolyte interface. As a result, engineering the electrode material and its interaction with the electrolyte is important in investigating and improving the energy conversion process in these devices. III-V nitride materials are promising candidates for photoelectrochemical energy applications. We demonstrate solar-to-hydrogen conversion in these cells using p-type GaN and n-type InGaN as a photocathode and photoanode material, respectively. Additionally, we demonstrate heteroepitaxial MOCVD growth of GaP on Si, enabling future work in developing GaPN as a photocathode material.

Paper Details

Date Published: 25 May 2012
PDF: 7 pages
Proc. SPIE 8377, Energy Harvesting and Storage: Materials, Devices, and Applications III, 83770B (25 May 2012); doi: 10.1117/12.925200
Show Author Affiliations
Vijay Parameshwaran, Stanford Univ. (United States)
Banpil Photonics, Inc. (United States)
Chad Gallinat, U.S. Army Research Lab. (United States)
Ryan W. Enck, U.S. Army Research Lab. (United States)
Anand V. Sampath, U.S. Army Research Lab. (United States)
Paul H. Shen, U.S. Army Research Lab. (United States)
Tevye Kuykendall, Lawrence Berkeley National Lab. (United States)
Shaul Aloni, Lawrence Berkeley National Lab. (United States)
Michael Wraback, U.S. Army Research Lab. (United States)
Bruce M. Clemens, Stanford Univ. (United States)


Published in SPIE Proceedings Vol. 8377:
Energy Harvesting and Storage: Materials, Devices, and Applications III
Nibir K. Dhar; Priyalal S. Wijewarnasuriya; Achyut K. Dutta, Editor(s)

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