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A Polymer with a Benzo[2,1‐b;3,4‐b′]dithiophene Moiety for Photovoltaic Applications
Author(s) -
Liu Miaoyin,
Rieger Ralph,
Li Chen,
Menges Hansjörg,
Kastler Marcel,
Baumgarten Martin,
Müllen Klaus
Publication year - 2010
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.200900161
Subject(s) - photovoltaic system , moiety , materials science , crystallinity , polymer solar cell , conjugated system , polymer , annealing (glass) , energy conversion efficiency , chemical engineering , diffraction , optoelectronics , organic chemistry , chemistry , optics , composite material , physics , biology , ecology , engineering
The characterization of a benzo[2,1‐b;3,4‐b′]dithiophene containing conjugated polymer (PBTT) is demonstrated, with regard to its photovoltaic performance. X‐ray diffraction measurements reveal that the thermal treatment results in an increased crystallinity within the PBTT:[70]PCBM network and subsequent spatial rearrangement in the film. Upon stepwise annealing, the PBTT‐based bulk‐heterojunction solar cells show an overall conversion efficiency of 2.7 % under 1 sun light illumination. The photovoltaic devices based on PBTT show a high efficiency, maintained over one month. All these aspects suggest that the use of self‐organizable materials is an efficient approach for high‐performance photovoltaic applications.