Fluorene‐Carbazole Dendrimers: Synthesis,Thermal, Photophysical and Electroluminescent Device Properties |
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| Authors: | Ozlem Usluer Serafettin Demic Daniel A M Egbe Eckhard Birckner Cem Tozlu Almantas Pivrikas Alberto Montaigne Ramil Niyazi Serdar Sariciftci |
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| Affiliation: | 1. Solar Energy Institute, Ege University, 35100, Bornova, Izmir (Turkey);2. Department of Chemistry, Art and Science Faculty, Mugla University, 48000, Mugla (Turkey);3. Linz Institute for Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University, Altenbergerstr. 69, A‐4040 Linz (Austria);4. Institute of Physical Chemistry, Friedrich Schiller‐University Jena, Lessingstrasse 10, 07743 Jena (Germany);5. Department of Physics, Art and Science Faculty, Mugla University, 48000‐Mugla (Turkey) |
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| Abstract: | Novel hole‐transporting dendrimeric molecules containing dioctylfluorene, spirobi(fluorene) and spiro(cylododecane‐fluorene) as the core unit and different numbers of carbazole and thiophene moieties as the peripheral groups are synthesized. All the dendrimers are characterized by 1H NMR, 13C NMR, FTIR, UV–vis, PL spectroscopy, and MALDI‐TOF. They are thermally stable with high glass transition and decomposition temperatures and exhibit chemically reversible redox processes. They are used as the hole‐transporting layer (HTL) material for multilayer organic light emitting diodes (OLEDs) with a low turn‐on voltage of around 2.5 V and a bright green emission with a maximum luminance of around 25400 cd m?2. |
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| Keywords: | carbazole dendrimers photophysics hole transporting layers organic light‐emitting diodes |
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