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Electronic Structure Calculations for Hole-Transporting Triphenylamine Derivatives in Polymer Light-Emitting Diodes

✍ Scribed by Dominik Kröner; Hartmut Krüger; Manuel W. Thesen

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
652 KB
Volume
20
Category
Article
ISSN
1022-1344

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✦ Synopsis

Abstract

Hole‐transporting polymers based on polyethene‐triphenylamine derivatives are investigated with respect to their UV/Vis spectra. Two substituents, N‐phenyl‐1‐naphthylamine and carbazole, are examined as their respective polymer light‐emitting diodes (PLEDs) show very different luminous efficiencies. In order to identify the origin of these phenomena electronic structure calculations based on TD‐DFT were performed using monomer models of the hole‐transporting polymers. In experiment these hole‐transporting polymers show very specific differences in their absorption and emission (fluorescence and phosphorescence) spectra. The analysis of the simulated absorption and emission spectra, the MOs as well as the ground and excited state geometries give explanations for the different optical performances of the corresponding PLEDs. magnified image

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