Issue 18, 2012

A new supramolecular POSS electroluminescent material

Abstract

A new polyhedral oligomeric silsesquioxane (POSS) core star-like supramolecular blue-light electroluminescent material, 4-uracilbutyl-1-methylpyrene ether (U-PY)/octakis[dimethyl(N-(6-acetamidopyridin-2 yl))siloxy] silsesquioxane (ODAP-POSS) has been synthesized. This U-PY/ODAP-POSS contains eight pyrene chromophore arms formed through complementary uracil-diamidopyridine (U-DAP) pairs and exhibits high quantum efficiencies and good solution processing properties. The photoluminescence spectra of U-PY/ODAP-POSS (50/50) reveal that the color is stable after heating the sample at 150 °C for 1 h, in contrast, the pyrene/ODAP-POSS (50/50) shows significant thermal quenching. An electroluminescence (EL) device based on U-PY/ODAP-POSS exhibits higher maximum brightness and higher luminance efficiency relative to that of the U-PY. In addition, U-PY/ODAP-POSS also behaves as an effective dopant that enhances energy transfer from itself to MEH-PPV. The U-PY/ODAP-POSS-doped MEH-PPV blends exhibit high luminance efficiency, 1.45 times greater than MEH-PPV.

Graphical abstract: A new supramolecular POSS electroluminescent material

Supplementary files

Article information

Article type
Paper
Submitted
05 Jan 2012
Accepted
07 Mar 2012
First published
28 Mar 2012

J. Mater. Chem., 2012,22, 9285-9292

A new supramolecular POSS electroluminescent material

Y. Chu, C. Cheng, Y. Chen, Y. Yen and F. Chang, J. Mater. Chem., 2012, 22, 9285 DOI: 10.1039/C2JM00095D

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