Boron(iii) β-diketonate-based small molecules for functional non-fullerene polymer solar cells and organic resistive memory devices

Panpan Li, Quanbin Liang, Eugene Yau Hin Hong, Chin Yiu Chan, Yat Hin Cheng, Ming Yi Leung, Mei Yee Chan, Kam Hung Low, Hongbin Wu, Vivian Wing Wah Yam

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A class of acceptor-donor-acceptor chromophoric small-molecule non-fullerene acceptors, 1-4, with difluoroboron(iii) β-diketonate (BF2bdk) as the electron-accepting moiety has been developed. Through the variation of the central donor unit and the modification on the peripheral substituents of the terminal BF2bdk acceptor unit, their photophysical and electrochemical properties have been systematically studied. Taking advantage of their low-lying lowest unoccupied molecular orbital energy levels (from -3.65 to -3.72 eV) and relatively high electron mobility (7.49 × 10-4 cm2 V-1 s-1), these BF2bdk-based compounds have been employed as non-fullerene acceptors in organic solar cells with maximum power conversion efficiencies of up to 4.31%. Moreover, bistable resistive memory characteristics with charge-trapping mechanisms have been demonstrated in these BF2bdk-based compounds. This work not only demonstrates for the first time the use of a boron(iii) β-diketonate unit in constructing non-fullerene acceptors, but also provides more insights into designing organic materials with multi-functional properties. This journal is

Original languageEnglish
Pages (from-to)11601-11612
Number of pages12
JournalChemical Science
Volume11
Issue number42
DOIs
Publication statusPublished - Nov 14 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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