The crucial role of intermolecular π-π Interactions in A-D-A-type electron acceptors and their effective modulation

Bowei Gao, Huifeng Yao, Bomee Jang, Jie Zhu, Runnan Yu, Yong Cui, Fenghao Wang, Junxian Hou, Han Young Woo, Jianhui Hou

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12 Citations (Scopus)


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%.

Original languageEnglish
Pages (from-to)2664-2670
Number of pages7
JournalJournal of Materials Chemistry A
Issue number6
Publication statusPublished - 2018 Jan 1


ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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