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Zinc oxide modified with benzylphosphonic acids as transparent electrodes in regular and inverted organic solar cell structures

  • An approach is presented to modify the work function of solution-processed sol-gel derived zinc oxide (ZnO) over an exceptionally wide range of more than 2.3 eV. This approach relies on the formation of dense and homogeneous self-assembled monolayers based on phosphonic acids with different dipole moments. This allows us to apply ZnO as charge selective bottom electrodes in either regular or inverted solar cell structures, using poly(3-hexylthiophene): phenyl-C71-butyric acid methyl ester as the active layer. These devices compete with or even surpass the performance of the reference on indium tin oxide/poly(3,4-ethylenedioxythiophene) polystyrene sulfonate. Our findings highlight the potential of properly modified ZnO as electron or hole extracting electrodes in hybrid optoelectronic devices. (C) 2015 AIP Publishing LLC.

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Author details:Ilja Lange, Sina Reiter, Juliane Kniepert, Fortunato Piersimoni, Michael Paetzel, Jana HildebrandtORCiDGND, Thomas J. K. Brenner, Stefan Hecht, Dieter NeherORCiDGND
DOI:https://doi.org/10.1063/1.4916182
ISSN:0003-6951
ISSN:1077-3118
Title of parent work (English):Applied physics letters
Publisher:American Institute of Physics
Place of publishing:Melville
Publication type:Article
Language:English
Year of first publication:2015
Publication year:2015
Release date:2017/03/27
Volume:106
Issue:11
Number of pages:5
Funding institution:Deutsche Forschungsgemeinschaft (DFG) within the Collaborative Research Centre HIOS [SFB 951, SPP 1355]; Helmholtz Energy Alliance for Hybrid Photovoltaics
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer review:Referiert
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