New oxadiazole complex with bipolar ligand for organic light-emitting devices |
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| Authors: | Guang Wang Yi He |
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| Affiliation: | 1. Faculty of Chemistry, Northeast Normal University, Changchun 130024, PR China;2. College of Chemistry, Jilin University, Changchun 130022, PR China;1. Department of Inorganic Chemistry, Industrial Engineering School, University of Valladolid, Spain;2. Department of Condensed Matter Physics, Faculty of Sciences, University of Valladolid, Spain;1. Department of Chemistry, University of Zanjan, 45195-313, Zanjan, Islamic Republic of Iran;2. Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, Wroclaw 50-383, Poland;1. Shaanxi Key Laboratory of Degradable Medical Material, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University, Xi’an 710069, Shaanxi, China;2. Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou 350002, Fujian, China;3. Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, China;4. Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station A5300, Austin, TX 78712-0165, United States;1. Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa;2. Gebze Institute of Technology, Department of Chemistry, PO Box 141, Gebze 41400, Turkey;1. Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, Saga-shi, Honjo-machi 1, Saga 840-8502, Japan;2. R&D Group, Daiden Co. Ltd. Kitashigeyasu 3330, Saga 849-0114, Japan;3. Kyushu Electric Power Co. Inc., Shiobaru 2-1-47, Minami-ku, Fukuoka 815-8520, Japan |
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| Abstract: | New oxadiazole complex with bipolar ligand, Zn(POTPA)2, was designed and synthesized, and used as an emitter material in single-layer organic electroluminescent (EL) devices (OLED). The UV absorbance of Zn(POTPA)2 is caused by electron π–π? transition. Zn(POTPA)2 exhibited strong blue luminescence in solution and film. Compared with triphenylamine and 2,5-diphenyl-1,3,4-oxadiazole, cyclic voltammograms exhibited that Zn(POTPA)2 has bipolar properties, and the optical band gap energy, Eg, calculated based on the cyclic voltammograms is nearly equal to that deduced from the absorption spectrum. Single-layer device with the structure of ITO/Zn(POTPA)2/Mg:Ag were fabricated and blue electroluminescence was observed with a maximum luminance of 271 cd/m2 and efficiency of 0.46 cd/A. |
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