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Proceedings Paper

Integration of biological photonic crystals in dye-sensitized solar cells for enhanced photocurrent generation
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Paper Abstract

Dye-sensitized solar cells (DSSCs) rely on a network of titanium dioxide nanoparticles for electron transport and must balance carrier generation and collection. Adding photonic structures may increase light capture without affecting carrier collection. Diatoms are single-celled algae that biologically fabricate silicon dioxide cell walls which resemble photonic crystal slabs. We present a simple fabrication strategy that allows for uniform and controlled placement of biosilica within DSSCs. Integration of biosilica reduces photoanode transmittance to less than 5% prior to dye sensitization at loading levels as low as 6 wt% biosilica. Increased biosilica loading (17 wt%) provides additional enhancements in photocurrent generation. Reflectance measurements suggest that the enhancement results from the combined effects of photonic resonance and Mie scattering. Overall efficiency of these devices is improved by 8% and 14%, respectively.

Paper Details

Date Published: 1 October 2013
PDF: 7 pages
Proc. SPIE 8817, Nanobiosystems: Processing, Characterization, and Applications VI, 88170Q (1 October 2013);
Show Author Affiliations
Jeremy Campbell, Oregon State Univ. (United States)
Greg Rorrer, Oregon State Univ. (United States)

Published in SPIE Proceedings Vol. 8817:
Nanobiosystems: Processing, Characterization, and Applications VI
Norihisa Kobayashi; Fahima Ouchen; Ileana Rau, Editor(s)

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