Carrier transport dependence on phosphorescent materials in polymer based OLEDs

Genichi Motomura, Mitsunori Suzuki, Takahisa Shimizu, Hideo Fujikake

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The carrier transport properties in the emissive layer of phosphorescent polymer organic light-emitting diodes (OLEDs) were observed by time-of-flight (TOF) mobility measurements. The hole and electron mobilities in carrier transport polymer without iridium complexes were measured with high levels, 3 × 10-4 cm2/Vs (hole) and 1 × 10-3 cm2/Vs (electron), of non-dispersive transport. The hole and/or electron transport properties were degraded when the iridium complexes were included in the phosphorescent polymers. The complexes acted as a trap in the phosphorescent polymers when the energy levels of the iridium complexes were lower than that of the carrier transport polymer.

Original languageEnglish
Title of host publicationCharge Generation/Transport in Organic Semiconductor Materials
Number of pages6
Publication statusPublished - 2011
Event2011 MRS Fall Meeting - Boston, MA, United States
Duration: 2011 Nov 282011 Dec 2

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Conference2011 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA


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