Shah Vivek B, Henson William R, Chadha Tandeep S, Lakin Gerard, Liu Haijun, Blankenship Robert E, Biswas Pratim
Aerosol and Air Quality Research Laboratory, Department of Energy, Environmental and Chemical Engineering, ‡Departments of Biology and Chemistry, and §Photosynthetic Antenna Research Center, Washington University in St. Louis , St. Louis, Missouri 63130, United States.
Langmuir. 2015 Feb 10;31(5):1675-82. doi: 10.1021/la503776b. Epub 2015 Jan 28.
Photosystem I (PSI) from oxygenic photosynthetic organisms is an attractive sensitizer for nano-biohybrid solar cells as it has a combined light-harvesting and reaction center in one protein complex and operates at a quantum yield close to one in biological systems. Using a linker-free deposition technique enabled by an electrospray system, PSI was coupled to 1-D nanostructured titanium dioxide thin films to fabricate an electrode for a photoelectrochemical cell. After deposition, the surfactant in the PSI aggregate was dissolved in the surfactant-free electrolyte, ensuring that partly hydrophobic PSI was not resuspended and stayed in contact with titanium dioxide. A maximum current density of 4.15 mA cm(-2) was measured after 10 min of electrospray deposition, and this is the highest current density reported so far for PSI-based photoelectrochemical cells. The high current is attributed to 1D nanostructure of titanium dioxide and orientation of the PSI onto the surface, which allows easy transfer of electrons.
来自产氧光合生物的光系统I（PSI）是纳米生物混合太阳能电池的一种有吸引力的敏化剂，因为它在一个蛋白质复合物中兼具光捕获和反应中心，并且在生物系统中的量子产率接近1。利用电喷雾系统实现的无连接剂沉积技术，将PSI与一维纳米结构的二氧化钛薄膜耦合，以制造用于光电化学电池的电极。沉积后，PSI聚集体中的表面活性剂溶解在无表面活性剂的电解质中，确保部分疏水的PSI不会重新悬浮并与二氧化钛保持接触。电喷雾沉积10分钟后测得的最大电流密度为4.15 mA cm(-2)，这是迄今为止基于PSI的光电化学电池报道的最高电流密度。高电流归因于二氧化钛的一维纳米结构以及PSI在表面的取向，这使得电子易于转移。
