Color tunable phosphorescent light-emitting diodes based on iridium complexes with substituted 2-phenylbenzothiozoles as the cyclometalated ligands |
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Authors: | Wei-Chieh Chang Jiun-Pey Duan Chien-Hong Cheng |
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Institution: | a Department of Chemical Engineering, National Tsing-Hua University, Hsinchu 300, Taiwan b Department of Chemistry, National Tsing-Hua University, Hsinchu 300, Taiwan |
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Abstract: | Several iridium complexes {iridium(III)bis2-(3-methoxyphenyl)-1,3-benzothiozolato-N,C2′] acetylacetonate (MeO-BT)2Ir(acac), iridium(III)bis2-(2,4-difluorophenyl)-1,3-benzothiozolato-N,C2′] acetylacetonate (2F-BT)2Ir(acac), and iridium(III)bis2-(2,4-difluorophenyl)-6-fluoro-1,3-benzothiozolato-N,C2′] acetylacetonate (3F-BT)2Ir(acac)} having different substituents on 2-phenylbenzothiazole have been synthesized. The phosphorescent light emitting diodes (PHOLEDs) using these iridium complexes as dopant emitters were fabricated. The experimental results revealed that the emissive colors of PHOLEDs could be finely tuned by suitable modification of the substituents on the 2-phenylbenzothiazole ligands. Furthermore, these iridium complexes show better emissive properties than the known iridium(III)bis(2-phenylbenzothiozolato-N,C2′) acetylacetonate (BT)2Ir(acac). |
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Keywords: | Iridium complexes Phosphorescent PHOLED Light-emitting diode Color-tunable |
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