期刊
ADVANCED FUNCTIONAL MATERIALS
卷 18, 期 19, 页码 3056-3062出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.200800446
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资金
- Solvay SA
- STC Program of the National Science Foundation [DMR-0120967]
- Office of Naval Research
Orange-emitting phosphorescent copolymers containing iridium complexes and bis(carbazolyl)fluorene groups in their side chains are employed as the emissive layer in multilayer organic light-emitting diodes (OLEDs). The efficiency of the OLED devices is optimized by varying characteristics of the copolymers: the molecular weight, the iridium loading level, and the nature and length of the linker between the side chains and the polymer backbone. A maximum efficiency of 4.9 +/- 0.4%, 8.8 +/- 0.7 cd A(-1) at 100 cd m(-2) is achieved with an optimized copolymer.
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