High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cells
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Conjugated polyelectrolyte (CPE) interfacial layers present a powerful way to boost the I-V characteristics of organic photovoltaics. Nevertheless, clear guidelines with respect to the structure of high-performance interlayers are still lacking. In this work, impedance spectroscopy is applied to probe the dielectric permittivity of a series of polythiophene-based CPEs. The presence of ionic pendant groups grants the formation of a capacitive double layer, boosting the charge extraction and device efficiency. A counteracting effect is the diminishing affinity with the underlying photoactive layer. To balance these two effects, we found copolymer structures containing nonionic side chains to be beneficial.
Details
Originalsprache | Englisch |
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Seiten (von - bis) | 6309-6314 |
Seitenumfang | 6 |
Fachzeitschrift | ACS Applied Materials and Interfaces |
Jahrgang | 8 |
Ausgabenummer | 10 |
Publikationsstatus | Veröffentlicht - 16 März 2016 |
Peer-Review-Status | Ja |
Extern publiziert | Ja |
Schlagworte
ASJC Scopus Sachgebiete
Schlagwörter
- cathode interlayers, conjugated polyelectrolytes, dielectric permittivity, impedance spectroscopy, organic photovoltaics