Polymer phosphorescent light-emitting devices doped with tris(2-phenylpyridine) iridium as a triplet emitter

Lee, Chang-Lyoul; Chang-Lyoul Lee; Lee, Kyung Bok; Kyung Bok Lee; Kim, Jang-Joo; Jang-Joo Kim
October 2000
Applied Physics Letters;10/9/2000, Vol. 77 Issue 15
Academic Journal
We have fabricated phosphorescent polymer light-emitting devices with tris(2-phenylpyridine) iridium [Ir(ppy)[sub 3]] as a triplet emissive dopant in poly(vinylcarbazole) (PVK) host. The device with 8% doping concentration of [Ir(ppy)[sub 3]] in PVK showed the external quantum efficiency of 1.9% and the peak luminance of 2,500 cd/m[sup 2]. The emission spectrum of the device exhibited no emission from PVK, indicating that the energy transfer from PVK to [Ir(ppy)[sub 3]] is efficient. This work demonstrates that efficient electrophosphorescent light-emitting devices can be realized with polymers. © 2000 American Institute of Physics.


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