New electrophosphorescent organic light-emitting diodes were fabricated by polymer/Ir(ppy)3 bilayers. Already several groups have reported polymer systems that show efficient energy transfer from a polymer host to an organometallic guest. We have fabricated a phosphorescent polymer light-emitting device with fac tris(2-phenylpyridine)iridium [Ir(ppy)3] as a triplet emissive layer on a poly(vinylcarbazole) (PVK) layer. The emission spectrum of the bilayer device exhibited pure Ir(ppy)3 emission, which indicates that the efficient energy transfer from PVK layer to Ir(ppy)3 layer. Our bilayer device system shows a lower driving voltage and a higher current density than those of the general blended device.
Bibliographical noteFunding Information:
This research was supported by a grant (code #: 04K1501-01210) from ‘Center for Nanostructured Materials Technology’ under ‘21st Century Frontier R&D Programs’ of the Ministry of Science and Technology, Korea.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Physics and Astronomy(all)