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Metal‐Free Benzodithiophene‐Containing Organic Dyes for Dye‐Sensitized Solar Cells
Author(s) -
Longhi Elena,
Bossi Alberto,
Di Carlo Gabriele,
Maiorana Stefano,
De Angelis Filippo,
Salvatori Paolo,
Petrozza Annamaria,
Binda Maddalena,
Roiati Vittoria,
Mussini Patrizia Romana,
Baldoli Clara,
Licandro Emanuela
Publication year - 2013
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.201200958
Subject(s) - dye sensitized solar cell , chemistry , chromophore , photochemistry , solar cell , electrolyte , conjugated system , time dependent density functional theory , acceptor , electrochemistry , organic solar cell , metal , organic semiconductor , density functional theory , electrode , optoelectronics , organic chemistry , computational chemistry , materials science , physics , condensed matter physics , polymer
Two new metal‐free organic dyes, CR29 and CR52 , with high extinction coefficients in the visible spectral region between 400–650 nm, have been synthesized. The donor–acceptor structure of the dyes feature benzodithiophene moieties BDT 1 and BDT as rigid π‐conjugated spacers, which have so far been very little studied for dye‐sensitized solar cell (DSSC) applications. DFT/TDDFT calculations have been employed to guide the design of the chromophores as well as to shed light on their electronic and optical properties. Photophysical and electrochemical characterization studies have been carried out to gather information on the charge transfer processes occurring at the dye–semiconductor interfaces. Under standard AM 1.5 conditions, DSSC sensitized with CR29 showed good conversion efficiencies: 5.14 % in the liquid electrolyte cell setup and 2.47 % in the solid‐state DSSC.