NDLI: Synthesis and characterisation of a carbazole-based bipolar exciplex-forming compound for efficient and color-tunable OLEDs

Content Provider	Royal Society of Chemistry (RSC)
Author	Helzhynskyy, Igor Volyniuk, Dmytro Bezvikonnyi, Oleksandr Grazulevicius, Juozas Vidas Simokaitiene, Jurate Ivaniuk, Khrystyna Stakhira, Pavlo Minaev, Boris Baryshnikov, Gleb Deksnys, Titas Cherpak, Vladyslav Keruckas, Jonas
Copyright Year	2017
Abstract	A new ambipolar fluorophore, 3,6-di(4,4′-dimethoxydiphenylaminyl)-9-(1-naphthyl)carbazole, was synthesized and its physical properties were studied by differential scanning calorimetry, thermogravimetric analysis, UV-vis absorption, luminescence and photoelectron emission spectroscopy, cyclic voltammetry and a time of flight method. The latter technique indicates that the compound demonstrates bipolar semiconducting properties. Using the synthesized compound as an emissive material, a single-layer OLED with an electroluminescence spectrum containing a voltage-dependent electroplex emission band in the region of 550–650 nm was fabricated. Another OLED was fabricated with an additional electron transporting bathophenanthroline layer that forms a direct interface with the layer of 3,6-di(4,4′-dimethoxydiphenylaminyl)-9-(1-naphthyl)carbazole. A strong exciplex-type band in the electroluminescence spectrum of this OLED with an emission maximum at ca. 540 nm was observed. The electroluminescence spectra of both devices were found to be clearly dependent on the applied bias. This effect can be useful for the development of efficient and colour-tunable OLEDs.
Starting Page	559
Ending Page	568
Page Count	10
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	41
Issue Number	2
Journal	New Journal of Chemistry
DOI	10.1039/c6nj02865a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Cyclic voltammetry Differential scanning calorimetry Photoelectric effect Spectroscopy Fluorophore Thermogravimetric analysis Luminescence Bipolar junction transistor Electroluminescence Carbazole
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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