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Efficiency limitations in a low band-gap diketopyrrolopyrrole-based polymer solar cell

Title data

Albert-Seifried, Sebastian ; Ko, Doo-Hyun ; Hüttner, Sven ; Kanimozhi, Catherine ; Patil, Satish ; Friend, Richard H.:
Efficiency limitations in a low band-gap diketopyrrolopyrrole-based polymer solar cell.
In: Physical Chemistry Chemical Physics. Vol. 16 (2014) Issue 14 . - pp. 6743-6752.
ISSN 1463-9084
DOI: https://doi.org/10.1039/C4CP00485J

Abstract in another language

We report the performance and photophysics of a low band-gap diketopyrrolopyrrole-based copolymer used in bulk heterojunction devices in combination with PC71BM. We show that the short lifetime of photogenerated excitons in the polymer constitutes an obstacle towards device efficiency by limiting the diffusion range of the exciton to the donor-acceptor heterojunction. We employ ultrafast transient-probe and fluorescence spectroscopy techniques to examine the excited state loss channels inside the devices. We use the high boiling point solvent additive 1,8-diiodooctane (DIO) to study the photoexcited state losses in different blend morphologies. The solvent additive acts as a compatibiliser between the donor and the acceptor material and leads to smaller domain sizes, higher charge formation yields and increased device efficiency.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Junior Professorship Solar Energy > Junior Professorship Solar Energy - Juniorprof. Dr. Sven Hüttner
Profile Fields > Advanced Fields > Polymer and Colloid Science
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Junior Professorship Solar Energy
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 30 Aug 2017 06:10
Last Modified: 30 Aug 2017 06:10
URI: https://eref.uni-bayreuth.de/id/eprint/39201