A non-fullerene electron acceptor based on central carbazole and terminal diketopyrrolopyrrole functionalities for efficient, reproducible and solution-processable bulk-heterojunction devices

Raynor, A, Gupta, A, Patil, H, Ma, D, Bilic, A, Rook, T and Bhosale, S 2016, 'A non-fullerene electron acceptor based on central carbazole and terminal diketopyrrolopyrrole functionalities for efficient, reproducible and solution-processable bulk-heterojunction devices', RSC Advances: an international journal to further the chemical sciences, vol. 6, no. 33, pp. 28103-28109.


Document type: Journal Article
Collection: Journal Articles

Title A non-fullerene electron acceptor based on central carbazole and terminal diketopyrrolopyrrole functionalities for efficient, reproducible and solution-processable bulk-heterojunction devices
Author(s) Raynor, A
Gupta, A
Patil, H
Ma, D
Bilic, A
Rook, T
Bhosale, S
Year 2016
Journal name RSC Advances: an international journal to further the chemical sciences
Volume number 6
Issue number 33
Start page 28103
End page 28109
Total pages 7
Publisher Royal Society of Chemistry
Abstract A novel, solution-processable non-fullerene electron acceptor, 6,6'-((9-(heptadecan-9-yl)-9H-carbazole-2,7-diyl)bis(thiophene-5,2-diyl))bis(2,5-bis(2-ethylhexyl)-3-(thiophen-2-yl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione) (coded as N7), based on central carbazole and terminal diketopyrrolopyrrole building blocks was designed, synthesized and characterized. N7 displayed excellent solubility, thanks to its design allowing incorporation of numerous lipophilic chains, thermal stability, and afforded a 2.30% power conversion efficiency with a high open-circuit voltage (1.17 V) when tested with the conventional donor polymer poly(3-hexylthiophene) in solution-processable bulk-heterojunction devices. To our knowledge, not only is N7 the first reported chromophore based on carbazole and diketopyrrolopyrrole functionalities but the open-circuit voltage reported here is among the highest values for a single junction bulk-heterojunction device that has been fabricated using a simple device architecture, with reproducible outcomes and with no special treatment.
Subject Medicinal and Biomolecular Chemistry not elsewhere classified
Keyword(s) organic solar-cells
open-circuit voltage
photovoltaic cells
building-blocks
dibenzosilole
performance
chromophores
fluorene
prepare
DOI - identifier 10.1039/c6ra01558a
Copyright notice © The Royal Society of Chemistry 2016
ISSN 2046-2069
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