Chang, Bum Jin Park, Jong Hyeok Lee, Kwang Hee Kim, Yong Chul Yu, Jae-Woong Kim, Jai Kyeong 2024-01-21T03:00:44Z 2024-01-21T03:00:44Z 2021-09-01 2006-07 1567-1739 https://pubs.kist.re.kr/handle/201004/135370 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. (c) 2005 Elsevier B.V. All rights reserved. English ELSEVIER DEVICES EFFICIENCY POLYMERS IRIDIUM LAYER Characteristics of emissive bilayers in electrophosphorescent organic light-emitting diodes Article 10.1016/j.cap.2005.04.015 1 CURRENT APPLIED PHYSICS, v.6, no.4, pp.658 - 662 CURRENT APPLIED PHYSICS 6 4 658 662 scie scopus kci other ART001019254 000238730700016 2-s2.0-33744729629 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article; Proceedings Paper DEVICES EFFICIENCY POLYMERS IRIDIUM LAYER electrophosphorescence bilayer PVK energy transfer light-emitting diodes