期刊
PHOTOCHEMISTRY AND PHOTOBIOLOGY
卷 88, 期 6, 页码 1467-1472出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1751-1097.2012.01190.x
关键词
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资金
- U.S. Department of Energy from the Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science [DE-FG02-08ER15957]
- U.S. National Science Foundation [CAREER CHE-1004218, NSF DMR-0968937, NSF NanoEHS-1134289]
- NSF-American Competitiveness and Innovation Fellowships (NSF-ACIF)
- NSF
- Direct For Mathematical & Physical Scien
- Division Of Physics [1057827] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0968937] Funding Source: National Science Foundation
Current interest in natural photosynthesis as a blueprint for solar energy conversion has led to the development of a biohybrid photovoltaic cell in which bacterial photosynthetic membrane vesicles (chromatophores) have been adsorbed to a gold electrode surface in conjunction with biological electrolytes (quinone [Q] and cytochrome c; Magis et al. [2010] Biochim. Biophys. Acta1798, 637-645). Since light-driven current generation was dependent on an open circuit potential, we have tested whether this external potential could be replaced in an appropriately designed dye-sensitized solar cell (DSSC). Herein, we show that a DSSC system in which the organic light-harvesting dye is replaced by robust chromatophores from Rhodospirillum rubrum, together with Q and cytochrome c as electrolytes, provides band energies between consecutive interfaces that facilitate a unidirectional flow of electrons. Solar IV testing revealed a relatively high Isc (short-circuit current) of 25 mu A cm(-2) and the cell was capable of generating a current utilizing abundant near-IR photons (maximum at ca 880 nm) with greater than eight-fold higher energy conversion efficiency than white light. These studies represent a powerful demonstration of the photoexcitation properties of a biological system in a closed solid-state device and its successful implementation in a functioning solar cell.
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