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High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cells
Hasselt University, Belgium.
Hasselt University, Belgium.
Hasselt University, Belgium.
Hasselt University, Belgium.
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2016 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 8, no 10, 6309-6314 p.Article in journal (Refereed) PublishedText
Abstract [en]

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.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2016. Vol. 8, no 10, 6309-6314 p.
Keyword [en]
organic photovoltaics; cathode interlayers; conjugated polyelectrolytes; impedance spectroscopy; dielectric permittivity
National Category
Physical Sciences
URN: urn:nbn:se:liu:diva-127270DOI: 10.1021/acsami.6b00242ISI: 000372479300002PubMedID: 26927416OAI: diva2:921610

Funding Agencies|IAP project Functional Supramolecular Systems [7/05]; Science Policy Office of the Belgian Federal Government (BELSPO); Research Program of the Research Foundation Flanders (FWO) [G.0415.14N]; Foundation for Fundamental Research on Matter (FOM) from The Netherlands Organization for Scientific Research (NWO) [V0714M-13MV60]; Swedish Research Council Linnaeus LiLi-NFM at Linkoping University; Vrije Universiteit Brussel (VUB); University of Montpellier; CNRS; University of Mons

Available from: 2016-04-20 Created: 2016-04-19 Last updated: 2016-05-11

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Liu, XianjieFahlman, Mats
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