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Issue 19, 2017
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A new pyrene cored small organic molecule with a flexible alkyl spacer: a potential solution processable blue emitter with bright photoluminescence

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Abstract

A new pyrene cored small organic molecule viz. 1,3,6,8-tetrakis(4-((5-(9H-carbazol-9-yl)pentyl)oxy)phenyl)pyrene (PY-II) was designed and synthesized. The carbazole moiety with an alkyl spacer was introduced at 1, 3, 6 and 8 positions of the pyrene core to improve the charge transport properties and solution processability. PY-II exhibited excellent solubility in common organic solvents and high thermal stability up to 345 °C. The photoluminescence quantum yield (PLQY) of PY-II in solution was found to be 0.9 with bright blue emission near 450 nm which is just appropriate for the human eye. The solution processed non-doped OLED device fabricated using PY-II as an emissive layer afforded a pure blue emission with CIE coordinates of 0.16 and 0.16, a power efficiency of 0.17 lm W−1, a maximum current efficiency of 0.41 cd A−1 and a maximum brightness of 202 cd m−2.

Graphical abstract: A new pyrene cored small organic molecule with a flexible alkyl spacer: a potential solution processable blue emitter with bright photoluminescence

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Publication details

The article was received on 31 May 2017, accepted on 20 Aug 2017 and first published on 22 Aug 2017


Article type: Paper
DOI: 10.1039/C7NJ01921A
Citation: New J. Chem., 2017,41, 11383-11390
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    A new pyrene cored small organic molecule with a flexible alkyl spacer: a potential solution processable blue emitter with bright photoluminescence

    N. G. Valsange, F. L. Wong, D. Shinde, C. S. Lee, V. A. L. Roy, S. Manzhos, K. Feron, S. Chang, R. Katoh, P. Sonar and P. P. Wadgaonkar, New J. Chem., 2017, 41, 11383
    DOI: 10.1039/C7NJ01921A

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