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Shape‐ and Functionality‐Controlled Organization of TiO 2 –Porphyrin–C 60 Assemblies for Improved Performance of Photochemical Solar Cells
Author(s) -
Hasobe Taku,
Fukuzumi Shunichi,
Hattori Shigeki,
Kamat Prashant V.
Publication year - 2007
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.200600358
Subject(s) - porphyrin , mesoscopic physics , supramolecular chemistry , materials science , energy conversion efficiency , nanotechnology , nanoparticle , substrate (aquarium) , photochemistry , chemical engineering , solar cell , optoelectronics , chemistry , molecule , organic chemistry , physics , oceanography , quantum mechanics , geology , engineering
Shape‐ and functionality‐controlled organization of porphyrin derivatives–C 60 supramolecular assemblies using TiO 2 nanotubes and nanoparticles has been achieved for the development of photochemical solar cells. The differences in the efficiency of light‐energy conversion of these solar cells are explained on the basis of the geometrical orientation of the porphyrins with respect to the TiO 2 surface and the supramolecular complex formed with C 60 . The maximum photon‐conversion efficiency (IPCE) of 60 % obtained with TiO 2 nanotube architecture is higher than the value obtained with nanoparticle architecture. The results presented in this study show the importance of substrate morphology in promoting electron transport within the mesoscopic semiconductor film.