期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 23, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/ijms23073865
关键词
bio-sensitized solar cells; photovoltaics; PEDOT; carbon nanotubes; photosystem I; bacteriorhodopsin; biocompatible
资金
- Medical Devices Master Program
- Direction of the Postgraduate Office of the Instituto Tecnologico de Costa Rica
- Instituto Tecnologico de Costa Rica [1490026]
- CSUB California Energy Research Center's Interdisciplinary Energy Research Program
- CSUB NSME Dean's office
- NIH R25 award [R25GM086761]
- Gibson Family Foundation
- Donald L. Akers Faculty Enrichment Fellowship
- Charles P. Postelle Distinguished Professorship
This study explores a novel counter electrode and redox mediator system that can be used for both PSI and bR devices and performs well. The compatibility of disparate photosensitizers with common mediators and counter electrodes may improve bio-sensitized PV design.
In nature, solar energy is captured by different types of light harvesting protein-pigment complexes. Two of these photoactivatable proteins are bacteriorhodopsin (bR), which utilizes a retinal moiety to function as a proton pump, and photosystem I (PSI), which uses a chlorophyll antenna to catalyze unidirectional electron transfer. Both PSI and bR are well characterized biochemically and have been integrated into solar photovoltaic (PV) devices built from sustainable materials. Both PSI and bR are some of the best performing photosensitizers in the bio-sensitized PV field, yet relatively little attention has been devoted to the development of more sustainable, biocompatible alternative counter electrodes and electrolytes for bio-sensitized solar cells. Careful selection of the electrolyte and counter electrode components is critical to designing bio-sensitized solar cells with more sustainable materials and improved device performance. This work explores the use of poly (3,4-ethylenedioxythiophene) (PEDOT) modified with multi-walled carbon nanotubes (PEDOT/CNT) as counter electrodes and aqueous-soluble bipyridine cobalt(II/III) complexes as direct redox mediators for both PSI and bR devices. We report a unique counter electrode and redox mediator system that can perform remarkably well for both bio-photosensitizers that have independently evolved over millions of years. The compatibility of disparate proteins with common mediators and counter electrodes may further the improvement of bio-sensitized PV design in a way that is more universally biocompatible for device outputs and longevity.
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