期刊
ACS NANO
卷 7, 期 8, 页码 6563-6574出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn4014164
关键词
M13 bacteriophage; biotemplate; three-dimensional network; dye-sensitized solar cells; electron transport; light harvesting; localized surface plasmon resonance
类别
资金
- Eni, S.p.A (Italy) through the MIT Energy Initiative Program
- NSF (ECCS) [1028568]
- Air Force Office of Scientific Research (AFOSR MURI) [FA9550-12-1-0488]
- MIT Energy Initiative Eni-MIT Energy Fellowship
- National Science Foundation [DMR-0819762]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1028568] Funding Source: National Science Foundation
By 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 846%, 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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