Publication date: 8th October 2020
Bio-photovoltaic devices based on photosynthetic compounds are a promising solution in the quest to explore new sustainable renewable energy options. Flexible transparent conductive electrodes have played a pivotal role in the advance of organic optoelectronic applications. We are looking to extend the present state of biohybrid devices to work on flexible, nanostructured surfaces for expanding potential applications.
Plasmonic nanowire electrodes for photosynthetic protein-based bio-photovoltaics have been found to increase protein loading capacity, the stability of protein and improved efficiency of photocurrent in the device[1]. In this work, we demonstrate devices consisting of photocathode made of silver nanowires (AgNW). These transparent electrodes are directly interfaced with reaction centre light-harvesting complex (RCLH1) isolated from the purple photosynthetic bacteria, Rhodobacter sphaeroides. A peak photocurrent of 177μA/cm2 is observed for the AgNWs electrode photovoltaics device, indicating successful fabrication of the electrode for bio-photovoltaics. We are using these new devices as model systems to study the photophysical dynamics in our bio-hybrid photoelectrodes with transient absorption spectroscopy.
I would to like thank Prof. Paul Blom and Dr. Charusheela Ramanan for their valuable supervision. Dr. Vincent Friebe for helpful discussion. Dr. Mike Jones for providing us with the Photosynthetic protein.
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