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Issue 25, 2014
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Light-emitting organic field-effect transistors based on highly luminescent single crystals of thiophene/phenylene co-oligomers

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Abstract

A series of thiophene/phenylene co-oligomers containing π-conjugated anthracene, naphthalene, and biphenyl central cores have been developed as new organic laser active materials. Light-emitting organic field-effect transistors (LE-OFETs) based on 2,6-bis(5-phenylthiophen-2-yl)anthracene (BPTA), 2,6-bis(5-phenylthiophen-2-yl)naphthalene (BPTN), and 2,6-bis(5-phenylthiophen-2-yl)-1,1′-biphenyl (BPTB) single crystals were fabricated. A clear laser oscillation was observed for BPTN and BPTB single crystals. Especially for BPTB, a low amplified spontaneous emission threshold of 1.8 ± 0.2 μJ cm−2 was achieved. In addition, all of the devices showed ambipolar transport characteristics, in which both electron and hole carriers are transported in a single FET device, and electroluminescence was clearly observed. An obvious difference in the light emission direction was observed for LE-OFET devices, which is attributed to the difference in transition dipole moment arrangement of individual molecules within the crystal.

Graphical abstract: Light-emitting organic field-effect transistors based on highly luminescent single crystals of thiophene/phenylene co-oligomers

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Publication details

The article was received on 24 Jan 2014, accepted on 12 Apr 2014 and first published on 15 Apr 2014


Article type: Paper
DOI: 10.1039/C4TC00164H
Citation: J. Mater. Chem. C, 2014,2, 4918-4921
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    Light-emitting organic field-effect transistors based on highly luminescent single crystals of thiophene/phenylene co-oligomers

    T. Komori, H. Nakanotani, T. Yasuda and C. Adachi, J. Mater. Chem. C, 2014, 2, 4918
    DOI: 10.1039/C4TC00164H

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