Issue 29, 2022

Solution-processable donor–π–acceptor type thieno[3,2-b]thiophene derivatives; synthesis, photophysical properties and applications

Abstract

Two novel donor-π-acceptor (D–π–A)-type pull–push materials, M1 and M2, having triphenylamine as a donor and dimesitylboron as an acceptor, linked through a thieno[3,2-b]thiophene (TT) π-conjugated spacer bearing different functional substituents, such as –PhCN and –Ph, were synthesized and fabricated via a solution process for OLED applications. They exhibited mega Stokes shifts of 120 nm and emissions both in the solid-state and in solution. The monomers M1 and M2 had strong intramolecular charge-transfer behaviors; the solid-state quantum yields were recorded to be 76 and 72% and the solution quantum efficiencies were determined to be 100 and 95%, respectively. The solution-processed OLEDs were fabricated using low turn-on voltages, which had performances with maximum power, current and external quantum efficiencies of around 8 lm W−1, 14.1 cd A−1 and 4.78%, respectively, displaying emission colors from blue to green and yellowish green. The materials had strong fluorescence emission colors between yellowish and bluish under UV irradiation.

Graphical abstract: Solution-processable donor–π–acceptor type thieno[3,2-b]thiophene derivatives; synthesis, photophysical properties and applications

Supplementary files

Article information

Article type
Paper
Submitted
07 iyn 2022
Accepted
04 iyl 2022
First published
04 iyl 2022

J. Mater. Chem. C, 2022,10, 10719-10727

Solution-processable donor–π–acceptor type thieno[3,2-b]thiophene derivatives; synthesis, photophysical properties and applications

R. Isci, L. Wan, S. Topal, D. Gunturkun, A. J. Campbell and T. Ozturk, J. Mater. Chem. C, 2022, 10, 10719 DOI: 10.1039/D2TC02371G

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