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Synthesis of light-emmting materials bis-[2′-2″-(9H-fluoren-2-yl)-vinyl-8-hydroxyquinoline] zinc(II) and bis-[2′-4″-(4,5-diphenyl-1H-imidazol-2-yl)styryl-8-hydroxyquinoline] zinc(II) |
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| Authors: | Ting-Ting Wang He-Ping Zeng Peng-Yi Liu Zhong-Jun Zhang |
| Institution: | a Institute of Functional Molecule, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China b School of Chemistry & Environment, South China Normal University, Guangzhou 510631, People's Republic of China c Department of Chemistry, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4M1, Canada d Department of Physics, Jinan University, Guangzhou 510632, People's Republic of China |
| Abstract: | Two novel light-emitting materials bis-2′-2″-(9H-fluoren-2-yl)-vinyl-8-hydroxyquinoline] zinc(II) (3) and bis-2′-4″-(4,5-diphenyl-1H-imidazol-2-yl)styryl-8-hydroxyquinoline] zinc(II) (4) containting 8-hydroxyquinoline and fluorene or imidazole moieties have been synthesized. The optical properties of these complexes were influenced by the styryl substituents, and exhibited orange-emission. They have higher fluorescence quantum yields than Alq3, and good stabilities with thermal decomposition temperatures 395 °C and 435 °C. The single-layer OLED fabricated by 3 emitted lemon-yellow, and exhibited good device performance with a maximum luminance of 489 cd m−2, and luminance efficiency of up to 0.41 cd A−1. The single-layer OLED fabricated by 4 emitted yellow-green, and exhibited good device performance with a maximum luminance of 323 cd m−2, and luminance efficiency of up to 0.54 cd A−1. |
| Keywords: | Single-layer organic light-emitting devices Fluorene Imidazole 8-Hydroxyquinoline derivatives |
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