期刊
CHEMSUSCHEM
卷 10, 期 22, 页码 4457-4460出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201701390
关键词
artificial photosynthesis; DNA; energy transfer; light harvesting; photoelectrochemical cells
资金
- DOD MURI Award [W911NF-12-10420]
- NSF [MCB-1157788]
- Div Of Molecular and Cellular Bioscience
- Direct For Biological Sciences [1157788] Funding Source: National Science Foundation
Three-to four-times higher performance of biohybrid photo-electrochemical cells with photosynthetic reaction centers ( RC) has been achieved by using a DNA-based biomimetic antenna. Synthetic dyes Cy3 and Cy5 were chosen and strategically placed in the anntena in such a way that they can collect additional light energy in the visible region of the solar spectrum and transfer it to RC through Forster resonance energy transfer ( FRET). The antenna, a DNA templated multiple dye system, is attached to each Rhodobacter sphaeroides RC near the primary donor, P, to facilitate the energy transfer process. Excitation with a broad light spectrum ( approximating sunlight) triggers a cascade of excitation energy transfer from Cy3 to Cy5 to P, and also directly from Cy5 to P. This additional excitation energy increases the RC absorbance cross-section in the visible and thus the performance of the photoelectrochemical cells. DNA-based biomimetic antennas offer a tunable, modular light-harvesting system for enhancing RC solar coverage and performance for photoelectrochemical cells.
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