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Isoindigo-based small molecules with varied donor components for solution-processable organic field effect transistor devices

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journal contribution
posted on 2024-06-18, 00:49 authored by H Patil, J Chang, A Gupta, A Bilic, J Wu, P Sonar, SV Bhosale
Two solution-processable small organic molecules, (E)-6,6'-bis(4-(diphenylamino)phenyl)-1,1'-bis(2-ethylhexyl)-(3,3'-biindolinylidene)-2,2'-dione (coded as S10) and (E)-6,6'-di(9H-carbazol-9-yl)-1,1'-bis(2-ethylhexyl)-(3,3'-biindolinylidene)-2,2'-dione (coded as S11) were successfully designed, synthesized and fully characterized. S10 and S11 are based on a donor-acceptor-donor structural motif and contain a common electron accepting moiety, isoindigo, along with different electron donating functionalities, triphenylamine and carbazole, respectively. Ultraviolet-visible absorption spectra revealed that the use of triphenylamine donor functionality resulted in an enhanced intramolecular charge transfer transition and reduction of optical band gap, when compared with its carbazole analogue. Both of these materials were designed to be donor semiconducting components, exerted excellent solubility in common organic solvents, showed excellent thermal stability, and their promising optoelectronic properties encouraged us to scrutinize charge-carrier mobilities using solution-processable organic field effect transistors. Hole mobilities of the order of 2.2 × 10(-4) cm²/Vs and 7.8 × 10(-3) cm²/Vs were measured using S10 and S11 as active materials, respectively.

History

Journal

Molecules

Volume

20

Pagination

17362-17377

Location

Switzerland

Open access

  • Yes

ISSN

1420-3049

eISSN

1420-3049

Language

English

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2015, The Authors

Issue

9

Publisher

MDPI AG