Issue 14, 2016

Tetraaryl pyrenes: photophysical properties, computational studies, crystal structures, and application in OLEDs

Abstract

Pyrene was derivatized in positions 1, 3, 6, and 8 to yield a series of nine tetraarylpyrenes for which absorption, emission, emission lifetimes and solvatochromism in solution were determined. The fluorescence quantum yields in thin films and crystalline state, electrochemistry, and quantum-chemical calculations were completed for the series along with the X-ray crystal structure analysis of compounds 1, 2, 4, 5, 7, and 9. Compounds 2, 3, 4 as well as 7 were identified as the most suitable candidates for OLED application. Notably, in an unoptimized single-layer device geometry, these compounds exhibited blue electroluminescence coupled with impressively low turn-on voltages and high maximum luminances such as 2.8 V and 13 542 cd m−2 at 8.2 V for compound 2, respectively.

Graphical abstract: Tetraaryl pyrenes: photophysical properties, computational studies, crystal structures, and application in OLEDs

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
10 ⵛⵓⵜ 2015
Accepted
01 ⴽⵜⵓ 2015
First published
15 ⴽⵜⵓ 2015

J. Mater. Chem. C, 2016,4, 3041-3058

Tetraaryl pyrenes: photophysical properties, computational studies, crystal structures, and application in OLEDs

T. H. El-Assaad, M. Auer, R. Castañeda, K. M. Hallal, F. M. Jradi, L. Mosca, R. S. Khnayzer, D. Patra, T. V. Timofeeva, J. Brédas, E. J. W. List-Kratochvil, B. Wex and B. R. Kaafarani, J. Mater. Chem. C, 2016, 4, 3041 DOI: 10.1039/C5TC02849C

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