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Title: Sputtered NiOx Films for Stabilization of p+n-InP Photoanodes for Solar-Driven Water Oxidation

Journal Article · · Advanced Energy Materials
 [1];  [2];  [1];  [1];  [2];  [1]
  1. California Institute of Technology (CalTech), Pasadena, CA (United States)
  2. Univ. of California, San Diego, CA (United States)

A reactively sputtered NiOx film has been used here to stabilize a buried-junction p+n-InP photoanode from anodic dissolution/corrosion for > 48 h of continuous light-driven evolution of O2(g) in 1.0 M KOH(aq) as well as in an aqueous electrolyte buffered at near-neutral pH. Under 1-Sun Air Mass (AM) 1.5G simulated solar illumination, NiOx-protected p+n-InP photoanodes produced photocurrent-onset potentials of -370 ± 10 mV referenced to the equilibrium potential for evolution of O2(g), light-limited photocurrent densities of 20.5 ± 0.3 mA cm-2, and photocurrent densities of 17.5 ± 0.4 mA cm-2 at the equilibrium potential for evolution of O2(g), while evolving O2(g) from 1.0 M KOH(aq) with 100% Faradaic yield. Furthermore, during 48 h of continuous operation, the total charge passed through the electrode, ~4600 C cm-2, exceeded by a factor of at least 10 the amount of charge required to anodically dissolve or oxidize the entire InP substrate.

Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Gordon and Betty Moore Foundation; US Air Force Office of Scientific Research (AFOSR)
Grant/Contract Number:
SC0004993; DMR‐0907652; DMR‐1106369; FA9550‐10‐1‐0572
OSTI ID:
1633791
Journal Information:
Advanced Energy Materials, Vol. 5, Issue 11; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 83 works
Citation information provided by
Web of Science

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Rational Design and Construction of Cocatalysts for Semiconductor-Based Photo-Electrochemical Oxygen Evolution: A Comprehensive Review journal November 2018
Strategies for Semiconductor/Electrocatalyst Coupling toward Solar‐Driven Water Splitting journal March 2020
Photoelectrocatalytic Materials for Solar Water Splitting journal May 2018
Single-Crystal Semiconductors with Narrow Band Gaps for Solar Water Splitting journal July 2015
Modeling, Simulation, and Implementation of Solar-Driven Water-Splitting Devices journal October 2016
Kinetic Competition between Water‐Splitting and Photocorrosion Reactions in Photoelectrochemical Devices journal November 2018
Recent Advances in Earth-Abundant Heterogeneous Electrocatalysts for Photoelectrochemical Water Splitting journal April 2017
Stable Hydrogen Production from Water on an NIR-Responsive Photocathode under Harsh Conditions journal March 2018
Developing a scalable artificial photosynthesis technology through nanomaterials by design journal December 2016
An efficient and stable photoelectrochemical system with 9% solar-to-hydrogen conversion efficiency via InGaP/GaAs double junction journal November 2019
Interface engineering of the photoelectrochemical performance of Ni-oxide-coated n-Si photoanodes by atomic-layer deposition of ultrathin films of cobalt oxide journal January 2015
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Stabilization of GaAs photoanodes by in situ deposition of nickel-borate surface catalysts as hole trapping sites journal January 2019
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Figures / Tables (4)