| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1327322 | Journal of Organometallic Chemistry | 2009 | 8 Pages |
Novel poly(fluorene-alt-carbazole) (PFCz) based copolymers with 3,6-carbazole-N-alkyl grafted iridium complex using 2,3-diphenylpyrazine as ligand (IrBpz) were synthesized by Suzuki polycondensation. The emission of host polymer, PFCz, was completely quenched when the copolymer with 1 mol% of iridium complex. An orange-red emission with CIE coordinate of (0.56, 0.42) was observed from Phosphorescent polymer light-emitting diodes (PhPLEDs). The PhPLEDs made by this copolymer–iridium complex showed a maximum luminous efficiency (LE) of 5.58 cd/A and a maximal luminance of 8625 cd/m2. White light with CIE coordinate of (0.33, 0.27) was observed from white PhPLEDs (WPhPLEDs) made by the copolymer containing 0.4 mol% iridium complex. A LE of 2.30 cd/A with luminance of 2068 cd/m2 was observed from WPhPLEDs.
Graphical abstractNovel poly(fluorene-alt-carbazole) (PFCz) based copolymers with 3,6-carbazole-N-alkyl grafted iridium complex using 2,3-diphenylpyrazine as ligand were synthesized. By complete or incomplete energy transfer from the host polymer to the guest iridium complex, the efficient orange-red or white light-emitting electroluminescence could be achieved.Figure optionsDownload full-size imageDownload as PowerPoint slide
