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Sulfonate-Conjugated Polyelectrolytes as Anode Interfacial Layers in Inverted Organic Solar Cells
- Source :
- Molecules, Volume 26, Issue 3, Molecules, Vol 26, Iss 763, p 763 (2021)
- Publication Year :
- 2021
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2021.
-
Abstract
- Conjugated polymers with ionic pendant groups (CPEs) are receiving increasing attention as solution-processed interfacial materials for organic solar cells (OSCs). Various anionic CPEs have been successfully used, on top of ITO (Indium Tin Oxide) electrodes, as solution-processed anode interlayers (AILs) for conventional devices with direct geometry. However, the development of CPE AILs for OSC devices with inverted geometry is an important topic that still needs to be addressed. Here, we have designed three anionic CPEs bearing alkyl-potassium-sulfonate side chains. Their functional behavior as anode interlayers has been investigated in P3HT:PC61BM (poly(3-hexylthiophene): [6,6]-phenyl C61 butyric acid methyl ester) devices with an inverted geometry, using a hole collecting silver electrode evaporated on top. Our results reveal that to obtain effective anode modification, the CPEs’ conjugated backbone has to be tailored to grant self-doping and to have a good energy-level match with the photoactive layer. Furthermore, the sulfonate moieties not only ensure the solubility in polar orthogonal solvents, induce self-doping via a right choice of the conjugated backbone, but also play a role in the gaining of hole selectivity of the top silver electrode.
- Subjects :
- Materials science
Organic solar cell
conjugated polyelectrolytes
Pharmaceutical Science
Conjugated system
Article
Analytical Chemistry
lcsh:QD241-441
chemistry.chemical_compound
anode interfacial layers
Photoactive layer
Electric Power Supplies
lcsh:Organic chemistry
Drug Discovery
Side chain
Electrochemistry
Physical and Theoretical Chemistry
inverted organic solar cells
Electrodes
Organic Chemistry
Conjugated Polyelectrolytes
Polyelectrolytes
Anode
Indium tin oxide
Sulfonate
chemistry
Chemical engineering
Chemistry (miscellaneous)
Sunlight
Molecular Medicine
Sulfonic Acids
Subjects
Details
- Language :
- English
- ISSN :
- 14203049
- Database :
- OpenAIRE
- Journal :
- Molecules
- Accession number :
- edsair.doi.dedup.....68340925c7a654a19a38044a759494da
- Full Text :
- https://doi.org/10.3390/molecules26030763