| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5274852 | Tetrahedron Letters | 2008 | 6 Pages |
Novel blue emitters, oligo-MCPPs (tri-MCPP, tetra-MCPP, and penta-MCPP), have been synthesized and characterized. The introduction of cyclopenta[def]phenanthrene (CPP) units into the structure of oligo-MCPPs gave LEDs with high efficiency and pure blue emission. UV-visible absorption spectra of the thin films of these compounds appear at 333-354Â nm, and their maximum PL emission at 416-447Â nm. Multilayer organic EL devices with oligo-MCPPs as an emitting layer showed the turn-on voltage of about 4.8Â V, the maximum brightness of 1076Â cd/m2 (at 8.2Â V), the maximum luminescence efficiency of 0.81Â cd/A, and the CIE coordinates of (0.17, 0.14) with blue color.
Graphical abstractThe synthesis of oligo-MCPPs (tri-MCPP, tetra-MCPP, and penta-MCPP) by Suzuki coupling and Yamamoto coupling for OLEDs.Download full-size image
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