Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 10, Pages 3929-3935Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am200805x
Keywords
niobium oxide; dye -sensitized solar cell; pulsed laser deposition; IPCE
Funding
- UNC EFRC: Solar Fuels and Next Generation Photovoltaics, an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001011]
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Vertically aligned bundles of Nb2O5 nanocrystals were fabricated by pulsed laser deposition (PLD) and tested as a photoanode material in dye-sensitized solar cells (DSSC). They were characterized using scanning and transmission electron microscopies, optical absorption spectroscopy (UV-vis), and incident-photon-to-current efficiency (IPCE) experiments. The background gas composition and the thickness of the films were varied to determine the influence of those parameters in the photoanode behavior. An optimal background pressure of oxygen. during deposition was found to produce a photoanode structure that both achieves high dye loading and enhanced photoelectrochemical performance. For optimal structures, IPCE values up to 40% and APCE values around 90% were obtained with the N-3 dye and I-3(-)/I- couple in acetonitrile with open circuit voltage of 0.71 V and 2.41% power conversion efficiency.
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