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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/8535

Title: Marked improvement in electroluminescence characteristics of organic light-emitting diodes using an ultrathin hole-injection layer of molybdenum oxide
Authors: Matsushima, Toshinori
Jin, Guang-He
Murata, Hideyuki
Issue Date: 2008-09-02
Publisher: American Institute of Physics
Magazine name: Journal of Applied Physics
Volume: 104
Number: 5
Start page: 054501-1
End page: 054501-6
DOI: 10.1063/1.2974089
Abstract: We show that the performance of organic light-emitting diodes (OLEDs) is markedly improved by optimizing the thickness of a hole-injection layer (HIL) of molybdenum oxide (MoO_3) inserted between indium tin oxide and N,N'-diphenyl-N,N'-bis(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (α-NPD). From results of the electroluminescence (EL) characteristics of OLEDs with various thicknesses of a MoO_3 HIL, we found that the OLED with a 0.75-nm-thick MoO_3 HIL had the lowest driving voltage and the highest power conversion efficiency among the OLEDs. Moreover, the operational lifetime of the OLED was improved by about a factor of 6 by using the 0.75-nm-thick MoO_3 HIL. These enhanced EL characteristics are attributable to the formation of an Ohmic contact at the interfaces composed of ITO/MoO_3/α-NPD.
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, Guang-He Jin, Hideyuki Murata, Journal of Applied Physics, 104(5), 054501 (2008) and may be found at http://link.aip.org/link/?JAPIAU/104/054501/1
URI: http://hdl.handle.net/10119/8535
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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