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Light‐Harvesting in the Near‐Infrared Region: Dye‐Sensitized Solar Cells Sensitized with Asymmetric Ring‐Expanded Zinc(II) Phthalocyanines
Author(s) -
Yamamoto Satoshi,
Ikeuchi Takuro,
Mori Shogo,
Kimura Mutsumi
Publication year - 2014
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.201402117
Subject(s) - chemistry , dye sensitized solar cell , photochemistry , fluorene , photosensitizer , zinc , homo/lumo , nanocrystalline material , ring (chemistry) , absorption (acoustics) , organic chemistry , crystallography , molecule , materials science , polymer , electrode , electrolyte , composite material
A near‐IR absorbing dye ( FcS1 ), in which three fluorene rings were fused with a porphyrazine ring, has been designed and synthesized as a photosensitizer for dye‐sensitized solar cells (DSSCs). The fusion of the fluorene rings led to tailoring of the HOMO and LUMO energy levels as well as an expansion of the π‐system. The absorption spectrum of FcS1 adsorbed onto a nanocrystalline TiO 2 film suggested the formation of J ‐aggregates with tilted orientation of the macrocyclic ligands. While the power conversion efficiency of DSSCs sensitized with FcS1 was a modest 3.2 % under simulated air mass 1.5 global sunlight, FcS1 can convert the red and near‐IR light regions between 600 and 860 nm into electricity.