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

Paul E Schwenn; Ke Gui; Alexandre M Nardes; Karsten B Krueger; Kwan H Lee; Karyn Mutkins; Halina Rubinstein-Dunlop; Paul E Shaw; Nikos Kopidakis; Paul L Burn; Paul Meredith

doi:10.1002/aenm.201000024

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

Journal article

Peer reviewed

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

Paul E Schwenn, Ke Gui, Alexandre M Nardes, Karsten B Krueger, Kwan H Lee, Karyn Mutkins, Halina Rubinstein-Dunlop, Paul E Shaw, Nikos Kopidakis, Paul L Burn, …

Advanced Energy Materials, Vol.1(1), pp.73-81

2011

DOI: https://doi.org/10.1002/aenm.201000024

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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- -propyl-9 -fl uoren-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- -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.

Details

Title: A small molecule non-fullerene electron acceptor for organic solar cells
Authors: Paul E Schwenn (Author) - University of Queensland
Ke Gui (Author) - University of Queensland
Alexandre M Nardes (Author) - National Renewable Energy Laboratory, United States
Karsten B Krueger (Author) - University of Queensland
Kwan H Lee (Author) - University of Queensland
Karyn Mutkins (Author) - University of Queensland
Halina Rubinstein-Dunlop (Author) - University of Queensland
Paul E Shaw (Author) - University of Queensland
Nikos Kopidakis (Author) - National Renewable Energy Laboratory, United States
Paul L Burn (Author) - University of Queensland
Paul Meredith (Author) - University of Queensland
Publication details: Advanced Energy Materials, Vol.1(1), pp.73-81
Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
Date published: 2011
DOI: 10.1002/aenm.201000024
ISSN: 1614-6832
Organisation Unit: University of the Sunshine Coast, Queensland; Thompson Institute
Language: English
Record Identifier: 99450630902621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter

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