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Organic solar cells with crosslinked polymeric exciton blocking layer

Title data

Hahn, Tobias ; Saller, Christina ; Weigl, M. ; Bauer, Irene ; Unger, Thomas ; Köhler, Anna ; Strohriegl, Peter:
Organic solar cells with crosslinked polymeric exciton blocking layer.
In: Physica Status Solidi A. (10 June 2015) . - pp. 1-7.
ISSN 1521-396X
DOI: https://doi.org/10.1002/pssa.201532040

Abstract in another language

We show that the performance of an organic solar cell can be increased by the introduction of an additional polymeric exciton blocking layer. In order to realize this, the novel polymer PFTPDAc with pendant acrylate groups is developed. Thin films are coated from a PFTPDAc solution and subsequently crosslinked by irradiation. Thereby, the film becomes completely insoluble and allows spincoating of a second polymer layer on top. We realize a three layer solar cell which contains a crosslinked PFTPDAc interlayer on top of the molybdenum oxide anode and layers of the low-bandgap polymer PCDTBT and C60. In comparison with a reference cell without the interlayer, the EQE is significantly increased in the spectral region between 400 and 650 nm. From current–voltage measurements a power conversion efficiency of 1.8% is determined. PL measurements show that the increase of solar cell performance is attributed to exciton blocking by the PFTPDAc interlayer.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: Early view (Online Version of Record published before inclusion in an issue)
Keywords: excitons; MoO3; organic solar cells; PCDTBT; photocrosslinking
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie - Univ.-Prof. Dr. Anna Köhler
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 03 Sep 2015 07:08
Last Modified: 03 Sep 2015 07:08
URI: https://eref.uni-bayreuth.de/id/eprint/19015