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Carbazole and arylamine functionalized iridium complexes for efficient electro-phosphorescent light-emitting diodes |
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| Authors: | Dan Wang He-Liang Fan Zeng-Ze Chu De-Chun Zou |
| Institution: | a Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China b Department of Chemistry, School of Science, Nanchang University, Nanchang 330031, China |
| Abstract: | We report the synthesis and characterization of four cyclometalated iridium complexes based on carbazole and arylamine modified 2-phenylpyridine. The carbazole and arylamine groups are linked to 2-phenyl pyridine backbone to enhance the energy harvesting and transfer from host to guest materials. The electrochemical and photophysical properties of the complexes are studied and electroluminescent devices are fabricated. The results show that the complexes with ligands containing carbazole moieties have desirable phosphorescent properties. The device with complex 3 doped PVK (poly (vinylcarbazole)) as emission layer achieves maximum luminous efficiency of 6.56 cd A−1 and maximum brightness of 14448 cd m−2. |
| Keywords: | Iridium complex Carbazole Phosphorescent materials Organic light-emitting diode |
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