Photosynthetic Protein Complexes as Bio-photovoltaic Building Blocks Retaining a High Internal Quantum Efficiency
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- 作者：Muhammad Kamran ; Juan D. Delgado ; Vincent Friebe ; Thijs J. Aartsma ; Raoul N. Frese
- 刊名：Biomacromolecules
- 出版年：2014
- 出版时间：August 11, 2014
- 年：2014
- 卷：15
- 期：8
- 页码：2833-2838
- 全文大小：304K
- ISSN：1526-4602
文摘
Photosynthetic compounds have been a paradigm for biosolar cells and biosensors and for application in photovoltaic and photocatalytic devices. However, the interconnection of proteins and protein complexes with electrodes, in terms of electronic contact, structure, alignment and orientation, remains a challenge. Here we report on a deposition method that relies on the self-organizing properties of these biological protein complexes to produce a densely packed monolayer by using Langmuir鈥揃lodgett technology. The monolayer is deposited onto a gold electrode with defined orientation and produces the highest light-induced photocurrents per protein complex to date, 45 渭A/cm2 (with illumination power of 23 mW/cm2 at 880 nm), under ambient conditions. Our work shows for the first time that a significant portion of the intrinsic quantum efficiency of primary photosynthesis can be retained outside the biological cell, leading to an internal quantum efficiency (absorbed photon to electron injected into the electrode) of the metal electrode鈥損rotein complex system of 32%.