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A Very Low Band Gap Diketopyrrolopyrrole–Porphyrin Conjugated Polymer
Author(s) -
Bucher Léo,
Tanguy Loïc,
Fortin Daniel,
Desbois Nicolas,
Harvey Pierre D.,
Sharma Ganesh D.,
Gros Claude P.
Publication year - 2017
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201700035
Subject(s) - porphyrin , conjugated system , chromophore , materials science , polymer , polymer solar cell , photochemistry , electron acceptor , band gap , acceptor , polymer chemistry , chemistry , optoelectronics , composite material , condensed matter physics , physics
A porphyrin–diketopyrrolopyrrole‐containing polymer (poly(porphyrin – diketopyrrolopyrrole) ( PPDPP )) shows impressive molar absorption coefficients from λ =300 to 1000 nm. The photophysical and structural properties of PPDPP have been studied. With PPDPP as the electron donor and [6,6]‐phenyl C 71 butyric acid methyl ester (PC 71 BM) as the electron acceptor, the bulk heterojunction polymer solar cell showed overall power conversion efficiencies of 4.18 and 6.44 % for as‐cast and two‐step annealing processed PPDPP :PC 71 BM (1:2) active layers, respectively. These results are quite impressive for porphyrin‐containing polymers, especially when directly included in the π‐conjugated backbone, and offer interesting perspectives for the design of new materials based on this chromophore.