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首页> 外文期刊>Advanced Functional Materials >Biohybrid Photoprotein-Semiconductor Cells with Deep-Lying Redox Shuttles Achieve a 0.7 V Photovoltage
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Biohybrid Photoprotein-Semiconductor Cells with Deep-Lying Redox Shuttles Achieve a 0.7 V Photovoltage

机译：具有深度氧化还原穿梭的生物混合光蛋白半导体细胞实现0.7 V的光电压

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摘要

Photosynthetic proteins transduce sunlight into biologically useful forms of energy through a photochemical charge separation that has a close to 100% quantum efficiency, and there is increasing interest in their use as sustainable materials in biohybrid devices for solar energy harvesting. This work explores a new strategy for boosting the open circuit voltage of photoelectrochemical cells based on a bacterial photosynthetic pigment-protein by employing highly oxidizing redox electrolytes in conjunction with an n-type silicon anode. Illumination generates electron-hole pairs in both the protein and the silicon electrode, the two being connected by the electrolyte which transfers electrons from the reducing terminal of the protein to photogenerated holes in the silicon valence band. A high open circuit voltage of 0.6 V is achieved with the most oxidizing electrolyte 2,2,6,6-tetramethyl-1-piperidinyloxy, and this is further improved to 0.7 V on surface modification of the silicon electrode to increase its surface area and reduce reflection of incident light. The photovoltages produced by these biohybrid protein/silicon cells are comparable to those typical of silicon heterojunction and dye-sensitized solar cells.
机译：光合蛋白通过光化学电荷分离将太阳光转化为生物学上有用的能量形式，其量子效率接近100％，人们越来越将它们用作可持续的材料，用于太阳能发电的生物混合设备中。这项工作探索了一种新的策略，该策略通过结合使用高氧化性氧化还原电解质和n型硅阳极来提高基于细菌光合作用色素蛋白的光电化学电池的开路电压。照明在蛋白质和硅电极上均产生电子-空穴对，二者通过电解质连接，该电解质将电子从蛋白质的还原端转移至硅价带中的光生空穴。使用氧化性最强的电解质2,2,6,6-四甲基-1-哌啶基氧基可实现0.6 V的高开路电压，并且在硅电极的表面改性后可进一步提高至0.7 V，以增加其表面积和减少入射光的反射。这些生物杂交蛋白/硅电池产生的光电压与硅异质结和染料敏化太阳能电池的典型光电压相当。

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