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Donor−Acceptor‐Functionalized Subphthalocyanines for Dye‐Sensitized Solar Cells
Author(s) -
Gotfredsen Henrik,
Neumann Timo,
Storm Freja Eilsø,
Muñoz Alberto Viñas,
Jevric Martyn,
Hammerich Ole,
Mikkelsen Kurt V.,
Freitag Marina,
Boschloo Gerrit,
Nielsen Mogens Brøndsted
Publication year - 2018
Publication title -
chemphotochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.13
H-Index - 18
ISSN - 2367-0932
DOI - 10.1002/cptc.201800135
Subject(s) - moiety , dye sensitized solar cell , acceptor , photochemistry , tetracyanoethylene , energy conversion efficiency , triphenylamine , materials science , cycloaddition , molecule , aniline , chemistry , polymer chemistry , organic chemistry , optoelectronics , catalysis , electrode , physics , electrolyte , condensed matter physics
Boron subphthalocyanines (SubPcs) are attractive as light harvesting materials in photovoltaic devices. Here we present the synthesis, optical and electrochemical properties, and device performances of a series of donor−acceptor‐functionalized SubPc derivatives incorporating a carboxylic acid for anchoring onto TiO 2 . Liquid‐ and solid‐state dye‐sensitized solar cells (DSCs) were prepared from three compounds, and a triad system consisting of two aniline donor moieties and a benzothiadiazole acceptor moiety was found to exhibit the highest power conversion efficiency (PCE) in the series (PCE=1.54 %; solid‐state device). The compounds were prepared by stepwise acetylenic coupling reactions. In addition, we present the synthesis and optical properties of a SubPc derivative incorporating three anilino‐substituted 1,1,4,4‐tetracyanobutadiene units, prepared by the [2+2] cycloaddition between three ethynyl units at the SubPc periphery and three tetracyanoethylene molecules followed by electrocyclic ring‐opening reactions.