Issue 7, 2017

Electroluminescent room temperature columnar liquid crystals based on bay-annulated perylene tetraesters

Abstract

Room temperature columnar liquid crystals with a wide thermal range, based on bay-annulated perylene tetraesters are reported. Through the incorporation of heteroatoms like N, S and Se in the bay position of the perylene tetraester the emission behavior in the solution state has been effectively tuned, where the N, S and Se-annulated derivatives showed bright green, blue and weak yellowish green fluorescence. The electroluminescence behavior of these compounds has been explored as emissive layers in organic light emitting diodes. Further, a remarkable improvement in the emission was achieved, when these molecules were doped in a matrix of polyvinyl carbazole (PVK), which is due to a combination of Förster resonance energy transfer from the host to the guest and charge carrier trapping in the emissive layer.

Graphical abstract: Electroluminescent room temperature columnar liquid crystals based on bay-annulated perylene tetraesters

Supplementary files

Article information

Article type
Paper
Submitted
24 Sep 2016
Accepted
16 Jan 2017
First published
17 Jan 2017

J. Mater. Chem. C, 2017,5, 1767-1781

Electroluminescent room temperature columnar liquid crystals based on bay-annulated perylene tetraesters

R. K. Gupta, D. Das, M. Gupta, S. K. Pal, P. K. Iyer and A. S. Achalkumar, J. Mater. Chem. C, 2017, 5, 1767 DOI: 10.1039/C6TC04166C

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