Optimized Performances of Thick Film Organic Lighting-Emitting Diodes

Chin. Phys. Lett.

2008, Vol. 25

Issue (12): 4425-4427 DOI:

Original Articles

Optimized Performances of Thick Film Organic Lighting-Emitting Diodes

WANG Xiu-Ru¹, ZHANG Zhi-Qiang², MA Dong-Ge², SUN Run-Guang¹

¹School of Material Science and Engineering, Shanghai University, Jiading Campus, PO Box 815, Shanghai 201800²State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022

Cite this article:

WANG Xiu-Ru, ZHANG Zhi-Qiang, MA Dong-Ge et al 2008 Chin. Phys. Lett. 25 4425-4427

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Abstract

The performance of organic light-emitting diodes (OLEDs) with thick film is optimized. The alternative vanadium oxide (V₂O₅) and N,N'-di(naphthalene-1-yl)-N,N'-diphenyl-benzidine (NPB) layers are used to enhance holes in the emissive region, and 4,7-dipheny-1,10-phenanthroline (Bphen) doped 8-tris-hydroxyquinoline aluminium (Alq₃) is used to enhance electrons in the emissive region, thus ITO/V₂O₅ (8nm)/NPB (52nm)/V₂O₅ (8nm)/NPB (52nm)/Alq₃ (30 and 45nm)/Alq₃:Bphen (30wt%, 30 and 45nm)/LiF (1nm)/Al (120nm) devices are fabricated. The thick-film devices show the turn-on voltage of about 3V and the maximal power efficiency of 4.5lm/W, which is 1.46 times higher than the conventional thin-film OLEDs.

Keywords: 78.60.Fi 78.55.Kz 81.15.Ef 85.60.Jb

Received: 27 May 2008 Published: 27 November 2008

PACS:	78.60.Fi	(Electroluminescence)
	78.55.Kz	(Solid organic materials)
	81.15.Ef
	85.60.Jb	(Light-emitting devices)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2008/V25/I12/04425

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	WANG Xiu-Ru
	ZHANG Zhi-Qiang
	MA Dong-Ge
	SUN Run-Guang

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