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- Title
Effect of Varying Thiophene Units on Charge-Transport and Photovoltaic Properties of Poly(phenylene ethynylene)- alt-poly(phenylene vinylene) Polymers.
- Authors
Adam, Getachew; Yohannes, Teketel; White, Matthew; Montaigne, Alberto; Ulbricht, Christoph; Birckner, Eckhard; Rathgeber, Silke; Kästner, Christian; Hoppe, Harald; Sariciftci, Niyazi Serdar; Egbe, Daniel Ayuk Mbi
- Abstract
Poly(phenylene ethynylene)- alt-poly(phenylene vinylene)s (PPE-PPVs) with various thiophene units (thiophene, bithiophene, and 3,4-ethylenedioxythiophene) at the X position, with the general backbone design (PhCC XCCPhCHCHPhCHCH), bearing identical solubilizing side chains at the phenylene rings of the polymers, are synthesized to study the effect of this structural alteration on the properties such as the photophysics, the electrochemical properties, the charge-carrier mobility, and the morphology of the materials and its impact on their photovoltaic performance. The polymers are obtained in good yields with reasonable molecular weights and show solubility in ordinary organic solvents required for solution-processing applications. The polymer with a basic thiophene ring at the X positions shows the highest open-circuit voltage ( VOC of 930 mV) and the polymer with a bithiophene unit at the X position shows the highest short-circuit current density and charge-carrier mobility, whereas the polymer with 3,4-ethylenedioxythiophene shows the lowest photovoltaic performance.
- Subjects
THIOPHENES; POLYPHENYLENE ethynylene; POLYPHENYLENE vinylene; ELECTROCHEMICAL research; ORGANIC solvents
- Publication
Macromolecular Chemistry & Physics, 2014, Vol 215, Issue 15, p1473
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201400207