Journal
THIN SOLID FILMS
Volume 536, Issue -, Pages 275-279Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2013.03.029
Keywords
Solid-state dye sensitized solar cells; Titanium dioxide; Nanofibers; Atomic layer deposition
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- National Science Foundation through NSF [DMR-0922522]
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We incorporated a thin but structurally dense TiO2 layer prepared by atomic layer deposition (ALD) as an efficient hole blocking layer in the TiO2 nanofiber based solid-state dye sensitized solar cell (ss-DSSC). The nanofiber ss-DSSCs having ALD TiO2 layers displayed increased open circuit voltage, short circuit current density, and power conversion efficiency compared to control devices with blocking layers prepared by spin-coating liquid TiO2 precursor. We attribute the improved photovoltaic device performance to the structural integrity of ALD-coated TiO2 layer and consequently enhanced hole blocking effect that results in reduced dark leakage current and increased charge carrier lifetime. (C) 2013 Elsevier B.V. All rights reserved.
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