Living photovoltaics represent a growing class of microbial devices that are based on whole cell–electrode interactions. The limited charge transfer at the cell–electrode interface represents a significant bottleneck in realizing an efficient technology. This study focuses on the development of poly(3,4‐ethylenedioxythiophene) (PEDOT)‐based electrodes that are electrosynthesized in the presence of a sodium dodecyl sulphate (SDS) dopant. Potentiodynamic and potentiostatic electrochemical techniques, as well as scanning electron microscopy (SEM), atomic force microscopy (AFM), Raman spectroscopy, and theoretical modelling of the electropolymerization transient, are employed to create and characterize PEDOT electrodes under various conditions. The electrodes are able to capture photosynthetically derived current under multiple light–dark cycles when interfaced with Synechocystis sp. PCC 6803. In the presence of the Synechocystis, the PEDOT electrodes show a sixfold and twofold enhancement over conventional graphite electrodes for both mediatorless and K₃Fe(CN)₆‐mediated conditions, respectively. The ability of these electrodes to enhance extracted photocurrent for both direct and indirect electron transfer mechanisms provides a versatile platform for improving various microbial devices.

中文翻译：

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基于光致细菌的基于PEDOT的优化电极增强生活光伏性能的设计

活性光伏代表了越来越多的基于全细胞-电极相互作用的微生物设备。电池-电极界面上有限的电荷转移代表了实现高效技术的重大瓶颈。这项研究的重点是基于聚（3,4-亚乙基二氧噻吩）（PEDOT）的电极的开发，该电极在十二烷基硫酸钠（SDS）掺杂剂的存在下进行电合成。电位动力学和恒电位电化学技术，以及扫描电子显微镜（SEM），原子力显微镜（AFM），拉曼光谱和电聚合瞬变的理论模型，可用于在各种条件下创建和表征PEDOT电极。集胞藻 PCC6803。在无集胞藻的情况下，PEDOT电极在无介体和K ₃ Fe（CN）₆介导的条件下分别显示出比传统石墨电极高六倍和两倍的性能。这些电极为直接和间接电子转移机制增强提取光电流的能力为改善各种微生物装置提供了一个通用平台。