Title: Influence of molybdenum oxide interface solvent sensitivity on charge trapping in bilayer cyanine solar cells
Authors : Jenatsch, Sandra
Hany, Roland
Véron, Anna C.
Neukom, Martin
Züfle, Simon
Borgschulte, Andreas
Ruhstaller, Beat
Nüesch, Frank
Published in : The Journal of Physical Chemistry Part C
Volume(Issue) : 118
Issue : 30
Pages : 17036
Pages to: 17045
Publisher / Ed. Institution : American Chemical Society
Issue Date: 2014
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subject (DDC) : 540: Chemistry
621.3: Electrical engineering and electronics
Abstract: Bilayer organic solar cells based on trimethine cyanine donor and C60 acceptor materials have been fabricated by coating the trimethine dye from solution on molybdenum oxide (MoO3) anode buffer layer. The choice of deposition solvent drastically influences device performance, with 2,2,3,3-tetrafluoro-1-propanol (TFP) reducing the fill factor and power conversion efficiency of the device by 36 and 21%, respectively, as compared to chlorobenzene. In the case of TFP, extraction of photogenerated charge carriers by linearly increasing voltage (photo-CELIV) and capacitance–voltage analysis revealed the formation of a hole trapping zone at the molybdenum oxide interface which is also responsible for the S-shape current–voltage curve under white light irradiation. The transient charge extraction signal originating from trapped holes at the MoO3 interface could be clearly distinguished from the one relating to hole mobility in cyanine films using photo-CELIV measurements with varying delay times.
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Publication type: Article in scientific Journal
DOI : 10.1021/jp5005314
ISSN: 1932-7447
URI: https://digitalcollection.zhaw.ch/handle/11475/6921
Appears in Collections:Publikationen School of Engineering

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