Advanced Materials Laboratories, Sony Corporation, Atsugi Technology Center No. 2, 4-16-1 Okata, Atsugi, Kanagawa, 243-0021, Japan.
Sony Europe Ltd., Materials Science Laboratory, Hedelfinger Strasse 61, 70327, Stuttgart, Germany.
Adv Mater. 2017 Jun;29(22). doi: 10.1002/adma.201605924. Epub 2017 Apr 12.
Electron transfer across proteins plays an important role in many biological processes, including those relevant for the conversion of solar photons to chemical energy. Previous studies demonstrated the generation of photocurrents upon light irradiation in a number of photoactive proteins, such as photosystem I or bacteriorhodopsin. Here, it is shown that Sn-cytochrome c layers act as reversible and efficient photoelectrochemical switches upon integration into large-area solid-state junctions. Photocurrents are observed both in the Soret band (λ = 405 nm) and in the Q band (λ = 535 nm), with current on/off ratios reaching values of up to 25. The underlying modulation in charge-transfer rate is attributed to a hole-transport channel created by the photoexcitation of the Sn-porphyrin.
电子在蛋白质间的转移在许多生物过程中起着重要作用，包括将太阳能转化为化学能的过程。先前的研究表明，在一些光活性蛋白（如光合作用系统 I 或菌紫质）中，光照会产生光电流。本文表明，Sn-细胞色素 c 层在整合到大面积固态结中时，可作为可逆且高效的光电化学开关。在 Soret 带（λ=405nm）和 Q 带（λ=535nm）都观察到了光电流，电流的开/关比高达 25。电荷转移速率的这种调制归因于 Sn-卟啉的光激发产生的空穴传输通道。
