Synthesis and electrophosphorescent performances of alkyl-substituted bicycloiridium complexes in polymer light-emitting diodes
| Autor: | Xingrong Zeng, Changyun Jiang, Yong Cao, Wei Yang, Hongyu Zhen, Chi Zhang |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
chemistry.chemical_classification
Photoluminescence Dopant Mechanical Engineering Metals and Alloys Quantum yield Electroluminescence Condensed Matter Physics Photochemistry Electronic Optical and Magnetic Materials chemistry Mechanics of Materials Materials Chemistry OLED Physical chemistry Quantum efficiency Luminous efficacy Alkyl |
| Zdroj: | Synthetic Metals. 155:196-201 |
| ISSN: | 0379-6779 |
| Popis: | In this paper, two complexes (mppy) 2 Ir(tmd) and (bppy) 2 Ir(tmd) were synthesized and doped into PVK. We find that the alkyl substitution of bicycloiridium complexes on acetylacetonate ligand has a great effect on optimizing the PLED performances. The best device performance is observed for the (bppy) 2 Ir(tmd)-doped PVK–PBD (40 wt%) device with the concentration of 1 wt%. A maximal external quantum efficiency of QE ext = 14.2% ph/el and the luminous efficiency of LE = 33 cd/A with a luminance of 2099 mA/cm 2 were achieved at a current density of 6.4 mA/cm 2 . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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