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Synthesis and properties of stable amorphous hole-transporting molecules for electroluminescent devices |
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| Authors: | Vinich Promarak Musubu Ichikawa Taweesak Sudyoadsuk Tinnagon Keawin |
| Institution: | a Department of Chemistry, Faculty of Science, Ubon Ratchathani University, Warinchumrap, Ubon Ratchathani, Thailand b Department of Functional Polymer Science, Shinshu University, Ueda, Nagano 386-8567, Japan |
| Abstract: | New triphenylamine-carbazole end-capped molecules were synthesized by a divergent approach using bromination and Suzuki cross-coupling reactions. All compounds showed an excellent electrochemical reversibility and a good thermal stability. They were fabricated as hole-transporting layers (HTLs) with the device configuration of ITO/HTL/Alq3/LiF:Al. A bright green emission from the Alq3 layer with a maximum luminance of 7500 cd/m2 was observed at 9.8 V and a low turn-on voltage of 3.4 V. |
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