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Enhanced exciton harvesting in a planar heterojunction organic photovoltaic device by solvent vapor annealing

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Zhang_2019_OE_Excitonharvesting_AAM.pdf (2.234Mb)
Date
07/2019
Author
Zhang, Yiwei
Sajjad, Muhammad T.
Blaszczyk, Oskar
Ruseckas, Arvydas
Serrano, Luis A.
Cooke, Graeme
Samuel, Ifor D.W.
Keywords
Organic solar cells
Exciton diffusion length
Photoluminescence quenching
Bilayer
QC Physics
DAS
Metadata
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Abstract
The singlet exciton diffusion length was measured in a small molecule electron donor material DR3TBDTT using fluorescence quenching at a planar interface with a cross-linked fullerene derivative. The one-dimensional exciton diffusion length was increased from ~16 to ~24 nm by annealing the film in carbon disulfide solvent vapor. Planar heterojunction solar cells were fabricated using bilayers of these materials and it was found that solvent vapor annealing increased the short circuit current density by 46%. This can be explained by improved exciton harvesting in the annealed bilayer.
Citation
Zhang , Y , Sajjad , M T , Blaszczyk , O , Ruseckas , A , Serrano , L A , Cooke , G & Samuel , I D W 2019 , ' Enhanced exciton harvesting in a planar heterojunction organic photovoltaic device by solvent vapor annealing ' , Organic Electronics , vol. 70 . https://doi.org/10.1016/j.orgel.2019.03.014
Publication
Organic Electronics
Status
Peer reviewed
DOI
https://doi.org/10.1016/j.orgel.2019.03.014
ISSN
1566-1199
Type
Journal article
Rights
Copyright © 2019 Published by Elsevier B.V. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.orgel.2019.03.014
Description
We thank the European Research Council (ERC) for financial support (EXCITON grant 321305). Data supporting this study is available at https://doi.org/10.17630/0e75f92d-6f8a-41be-ad45-ac6d1d890ee2.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/19644

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