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- Title
Optical Shading Induces an In‐Plane Potential Gradient in a Semiartificial Photosynthetic System Bringing Photoelectric Synergy.
- Authors
Ravi, Sai Kishore; Zhang, Yaoxin; Wang, Yanan; Nandakumar, Dilip Krishna; Sun, Wanxin; Jones, Michael R.; Tan, Swee Ching
- Abstract
Semiartificial photosynthetic systems have opened up new avenues for harvesting solar energy using natural photosynthetic materials in combination with synthetic components. This work reports a new, semiartificial system for solar energy conversion that synergistically combines photoreactions in a purple bacterial photosynthetic membrane with those in three types of transition metal–semiconductor Schottky junctions. A transparent film of a common transition metal interfaced with an n‐doped silicon semiconductor exhibits an in‐plane potential gradient when a light‐penetration variance is established on its surface by optical shading of photoabsorbing photosynthetic membranes. The in‐plane potential gradients (0.08–0.3 V) enable a directional charge transport between the synthetic and natural photoelectric systems, which is further enhanced in a device setting by a biocompatible thixotropic gel electrolyte that permeates the membrane multilayer, facilitating a strong and steady photoelectric current as high as 1.3 mA cm−2, the highest achieved so far with any anoxygenic photosynthetic system.
- Subjects
ENERGY harvesting; SOLAR energy conversion; THIXOTROPIC gels; PHOTOCURRENTS; BACTERIAL cell walls
- Publication
Advanced Energy Materials, 2019, Vol 9, Issue 35, pN.PAG
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.201901449