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Title: Pulsed laser deposition of delafossite oxide thin films on YSZ (001) substrates as solar water splitting photocathodes

Journal Article · · Environmental Science: Nano
DOI: https://doi.org/10.1039/d4en00706a · OSTI ID:2481340
ORCiD logo [1];  [1];  [2]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  2. Institute of Technological Development for the Chemical Industry, Santa Fe (Argentina)
  3. Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN); Stony Brook Univ., NY (United States)
  4. Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)

Development of solar energy converters with earth-abundant and environmentally friendly materials is one of the key routes explored towards a sustainable future. In this work, crystalline delafossite-phase CuAlO2 and CuFeO2 thin film solar water splitting photocathodes were fabricated using pulsed laser deposition. It was found that the desired delafossite phase was formed only after high temperature annealing in an oxygen-free atmosphere. Further, the homogeneous delafossite bulk structure of the films was determined by correlating simulation results from first-principles calculations with synchrotron-based X-ray absorption near edge structure (XANES) spectroscopy. Both CuAlO2 and CuFeO2 photocathodes are active for solar water splitting, with the latter more efficient due to its narrower band gap and improved light absorption.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN); Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
SC0012704
OSTI ID:
2481340
Report Number(s):
BNL--226406-2024-JAAM
Journal Information:
Environmental Science: Nano, Journal Name: Environmental Science: Nano Journal Issue: 1 Vol. 12; ISSN 2051-8153
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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