nn4014164_si_001.pdf (4.97 MB)
Versatile Three-Dimensional Virus-Based Template for Dye-Sensitized Solar Cells with Improved Electron Transport and Light Harvesting
journal contribution
posted on 2013-08-27, 00:00 authored by Po-Yen Chen, Xiangnan Dang, Matthew T. Klug, Jifa Qi, Noémie-Manuelle Dorval Courchesne, Fred J. Burpo, Nicholas Fang, Paula T. Hammond, Angela M. BelcherBy genetically encoding affinity for inorganic materials into the capsid proteins of the M13 bacteriophage, the virus can act as a template for the synthesis of nanomaterial composites for use in various device applications. Herein, the M13 bacteriophage is employed to build a multifunctional and three-dimensional scaffold capable of improving both electron collection and light harvesting in dye-sensitized solar cells (DSSCs). This has been accomplished by binding gold nanoparticles (AuNPs) to the virus proteins and encapsulating the AuNP–virus complexes in TiO2 to produce a plasmon-enhanced and nanowire (NW)-based photoanode. The NW morphology exhibits an improved electron diffusion length compared to traditional nanoparticle-based DSSCs, and the AuNPs increase the light absorption of the dye-molecules through the phenomenon of localized surface plasmon resonance. Consequently, we report a virus-templated and plasmon-enhanced DSSC with an efficiency of 8.46%, which is achieved through optimizing both the NW morphology and the concentration of AuNPs loaded into the solar cells. In addition, we propose a theoretical model that predicts the experimentally observed trends of plasmon enhancement.
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capsid proteinsLight HarvestingBynanomaterial compositesdevice applicationselectron collectionNW morphologyNW morphology exhibitslight absorptionplasmon enhancementElectron Transportlight harvestingbinding gold nanoparticleselectron diffusion lengthsurface plasmon resonanceM 13 bacteriophageTiO 2DSSCencoding affinityvirus proteinsAuNPs increase
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