Electrophosphorescent Polyfluorenes Containing Osmium Complexes in the Conjugated Backbone
| Autor: | Yun Chi, Sheng-Yuan Chang, Ching-Fong Shu, Song-Fu Liao, Chen-Han Chien, Pi-Tai Chou, Chen-Hao Wu, Cheng-Hsuan Lai |
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| Rok vydání: | 2008 |
| Předmět: |
chemistry.chemical_classification
Materials science chemistry.chemical_element Polymer Electroluminescence Conjugated system Condensed Matter Physics Photochemistry Electronic Optical and Magnetic Materials Biomaterials Polyfluorene chemistry.chemical_compound chemistry Covalent bond Electrochemistry OLED Copolymer Osmium |
| Zdroj: | Advanced Functional Materials. 18:1430-1439 |
| ISSN: | 1616-301X |
| Popis: | Electrophosphorescent copolymers have been synthesized by covalent bonding of a red-emitting osmium complex Os(bpftz), which contains two 3-trifluoromethyl-5-(4-tert-butyl-2-pyridyl)triazolate (bpftz) cyclometalated ligands, into the backbone of a bipolar polyfluorene (PF) copolymer. Employing these copolymers, a highly efficient red polymer light-emitting diode has been realised that has an external quantum efficiency of 18.0%, a maximum brightness of 38000cdm � 2 , and an emission centered at 618nm. In addition, after incorporating appropriate amounts of green-emitting benzothiadiazole (BT) and the aforementioned Os(bpftz) into the bipolar PF, an efficient white-light electroluminescent polymer is obtained that displays simultaneous blue, green, and red emissions. |
| Databáze: | OpenAIRE |
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