Light harvesting devices

Porphyrins are also able to directly interact with the nanotube sidewalls. For example, tetraphenyl porphyrin (H2-TPP) has been reported to interact with nanotubes to form TPPs/CNTs compounds that are stable for days. Stability has been enhanced by using a micelle-assisted approach, leading to stable structures with potential applications in light harvesting devices [76]. 

The cathode photocurrent is in proportion to the number of TCPP layers at least up to 10 cycles. The efficiency is greatly dependent on the kinds of oxide gel. These experimental observations suggest that electron transfer from the electrode to the porphyrin via the oxide gel layer is an essential mechanism of the photocurrent generation. Oxygen molecules as an electron acceptor readily diffuse in the oxide gel films of about 20 nm thickness. The electron transfer from the electrode to the porphyrin is assisted by satisfactory conductivity of the gel layer. The overall photocurrent value is considerably smaller than the conventional wet solar cell [11]. However, modification of the electrode surface by ultrathin oxide gel films will facilitate the design of novel light harvesting devices. 

New and highly efficient synthetic routes have generated many porphyrinlike compounds with unique characteristics for their uses in several other applications like oxidative catalysis [ 19,20] and as biomimetic model systems of the primary processes of photosynthesis [21,22]. Presently, the interest includes also the supramolecular units, including molecular recognition in chemical receptors and sensors [23-25], use as light-harvesting devices [26-29], and as materials for advanced technologies, mainly in nanosciences [30, 31]. 

Miyatake, T., H. Tamiaki, A.R. Holtzwarth, and K. Schaffner (1999). Self-assembly of synthetic zinc chlorins in aqueous microheterogeneous media to an artiflcal supramolecular light-harvesting device. Helv. Chim. Acta 82(6), 797-810. 

COFs Frameworks composed of purely covalent bonds (C-C, C-O, C-B and B-O) 9 to 34 711 to 4230 Gas storage, heterogeneous catalysis, as photoconductors, light harvesting devices... 

A. Aubiy, D.Y. Lei, A.L Femandez-Dominguez, Y. Sonnelraud, S.A. Maitn, J.B. Pendry, Plasmonic light-harvesting devices over the whole visible spectrum. Nano Lett. 10(7), 2574-2579 (2010)... 

Polypyridine ruthenimn complexes prepared by palladiiun-catalyzed grafting reactions have shown properties indicating their potential for use as light-harvesting devices. Fraser and coworkers have utilized ruthenium tTO-bipyridine complexes as the core molecule in the preparation of star polymers. ... 

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