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Issue 6, 2018
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The crucial role of intermolecular π–π interactions in A–D–A-type electron acceptors and their effective modulation

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Abstract

Here, the crucial role of intermolecular π–π interactions in A–D–A-type acceptors is examined and a simple yet effective modulation method is presented. By side chain manipulation, two small molecule acceptors, IDT-C6 and IDT-PhC6, are designed and synthesized with different crystalline morphologies. Since n-hexyl side chains have less steric hindrance than hexylphenyl side chains, IDT-C6 exhibits enhanced intermolecular π–π interactions relative to IDT-PhC6. Benefiting from the improved charge transport properties of the IDT-C6-based device, a high PCE of 12.5% is recorded, whereas those of the IDT-PhC6-based device delivers a moderate PCE of just 5.6%.

Graphical abstract: The crucial role of intermolecular π–π interactions in A–D–A-type electron acceptors and their effective modulation

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Publication details

The article was received on 28 Nov 2017, accepted on 04 Jan 2018 and first published on 04 Jan 2018


Article type: Paper
DOI: 10.1039/C7TA10461H
Citation: J. Mater. Chem. A, 2018,6, 2664-2670
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    The crucial role of intermolecular π–π interactions in A–D–A-type electron acceptors and their effective modulation

    B. Gao, H. Yao, B. Jang, J. Zhu, R. Yu, Y. Cui, F. Wang, J. Hou, H. Y. Woo and J. Hou, J. Mater. Chem. A, 2018, 6, 2664
    DOI: 10.1039/C7TA10461H

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