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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/8541

Title: Enhancing power conversion efficiencies and operational stability of organic light-emitting diodes by increasing carrier injection efficiencies at anode/organic and organic/organic heterojunction interfaces
Authors: Matsushima, Toshinori
Murata, Hideyuki
Issue Date: 2008-08-06
Publisher: American Institute of Physics
Magazine name: Journal of Applied Physics
Volume: 104
Number: 3
Start page: 034507-1
End page: 034507-4
DOI: 10.1063/1.2964113
Abstract: We fabricated long-lived multilayer organic light-emitting diodes (OLEDs), in which a 0.75 nm thick hole-injection layer of molybdenum oxide (MoO_3) and a 5 nm thick mixed layer at an organic/organic heterojunction interface were embedded. The use of the MoO_3 layer and of the mixed layer enhanced carrier injection at anode/organic and organic/organic heterojunction interfaces, resulting in a marked decrease in driving voltage and an increase in power conversion efficiency in the OLEDs. We observed about a factor of 9 improvement in the operational lifetime of the OLEDs by using the MoO_3 layer and the mixed layer as well. We assume that the lifetime improvement originates from the suppression of a thermally induced electrochemical degradation process of organic emitting molecules due to the reduction in the probability of the generation of Joule heat.
Rights: Copyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Toshinori Matsushima, Hideyuki Murata, Journal of Applied Physics, 104(3), 034507 (2008) and may be found at http://link.aip.org/link/?JAPIAU/104/034507/1
URI: http://hdl.handle.net/10119/8541
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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