A small molecule non-fullerene electron acceptor for organic solar cells

Schwenn, Paul, Gui, Kurt, Nardes, Alexandre M., Krueger, Karsten, Lee, Kwan, Mutkins, Karyn, Rubinsztein-Dunlop, Halina, Shaw, Paul Edward, Kopidakis, Nikos, Burn, Paul and Meredith, Paul (2011) A small molecule non-fullerene electron acceptor for organic solar cells. Advance Energy Materials, 1 1: 73-81. doi:10.1002/aenm.201000024

Author Schwenn, Paul
Gui, Kurt
Nardes, Alexandre M.
Krueger, Karsten
Lee, Kwan
Mutkins, Karyn
Rubinsztein-Dunlop, Halina
Shaw, Paul Edward
Kopidakis, Nikos
Burn, Paul
Meredith, Paul
Title A small molecule non-fullerene electron acceptor for organic solar cells
Journal name Advance Energy Materials   Check publisher's open access policy
ISSN 1614-6840
Publication date 2011-01-01
Year available 2010
Sub-type Article (original research)
DOI 10.1002/aenm.201000024
Open Access Status DOI
Volume 1
Issue 1
Start page 73
End page 81
Total pages 9
Place of publication Germany
Publisher Wiley - VCH Verlag GmbH & Co. KGaA
Language eng
Abstract Organic bulk heterojunction photovoltaic devices predominantly use the fullerene derivatives [C60]PCBM and [C70]PCBM as the electron accepting component. This report presents a new organic electron accepting small molecule 2-[{7-(9,9-di-n-propyl-9H-fluoren-2-yl)benzo[c][1,2,5]thiadiazol-4-yl}methylene]malononitrile (K12) for organic solar cell applications. It can be processed by evaporation under vacuum or by solution processing to give amorphous thin films and can be annealed at a modest temperature to give films with much greater order and enhanced charge transport properties. The molecule can efficiently quench the photoluminescence of the donor polymer poly(3-n-hexylthiophene-2,5-diyl) (P3HT) and time resolved microwave conductivity measurements show that mobile charges are generated indicating that a truly charge separated state is formed. The power conversion efficiencies of the photovoltaic devices are found to depend strongly on the acceptor packing. Optimized K12:P3HT bulk heterojunction devices have efficiencies of 0.73±0.01% under AM1.5G simulated sunlight. The efficiencies of the devices are limited by the level of crystallinity and nanoscale morphology that was achievable in the blend with P3HT.
Keyword Photovoltaic devices
Organic electronics
N-type organic semiconductors
Organic electron acceptors
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID FF0668728
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2011 Collection
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Citation counts: TR Web of Science Citation Count  Cited 116 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 112 times in Scopus Article | Citations
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Created: Sat, 05 Mar 2011, 00:35:15 EST by Jo Hughes on behalf of Physics