FTIR Study of the Impact of PC[60]BM on the Photodegradation of the Low Band Gap Polymer PCPDTBT under O2 Environment
Source abstract
Abstract
The photodegradation of the low band gap polymer poly[2,6-(4,4-bis(2-ethylhexyl)-4 H -cyclopenta[2,1- b;3,4- b ′]dithiophene)- alt -4,7(2,1,3-benzothiadiazole)] (PCPDTBT) during irradiation under white light (AM 1.5 conditions) has been studied in pristine polymer films as well as in blend films with [6,6]-phenyl C 61 butyric acid methyl ester (PC[60]BM). In order to gain insight into the degradation process, FTIR spectroscopy has been used to follow the evolution of different subunits of the polymer and to probe the chemical product formation. In contrast to other polymers, not the alkyl side chains but the π-conjugated system is preferentially oxidized during the first stages of degradation. Furthermore, it has been shown that the subunits of the polymer backbone are differently affected by the degradation. Blending the polymer with PC[60]BM leads to a significantly larger impact on the stability of the cyclopentadiene group compared to the benzene ring of the benzothiadiazole group.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Organic Light-Emitting Diodes Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute for Physical and Theoretical Chemistry, Eberhard-Karls-University, Auf der Morgenstelle 18, 72076 Tübingen, Germany
ZAE Bayern, Haberstrasse 2a, 91058 Erlangen, Germany
Institute of Materials for Electronics and Energy, Technology (I-MEET), Department of Materials Science and Engineering, Friedrich-Alexander-University, Martensstrasse 7, 91058, Erlangen, Germany
Funding
Baden-Wuerttemberg Stiftung · Bayerische Forschungsstiftung · Eberhard Karls Universität Tübingen
References (48)
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