Organic Light-Emitting Devices with a LiF Hole Blocking Layer

Chin. Phys. Lett.

2007, Vol. 24

Issue (3): 828-830 DOI:

Original Articles

Organic Light-Emitting Devices with a LiF Hole Blocking Layer

LIAN Jia-Rong;YUAN Yong-Bo;ZHOU Xiang

State Key Lab of Optoelectronic Materials and Technologies, Guangdong Province Key Lab of Display Material and Technology, Sun Yat-Sen University, Guangzhou 510275

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LIAN Jia-Rong, YUAN Yong-Bo, ZHOU Xiang 2007 Chin. Phys. Lett. 24 828-830

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Abstract We introduce a thin LiF layer into tris-8-hydroxyquinoline aluminium (Alq₃) based bilayer organic light-emitting devices to block hole transport. By varying the thickness and position of this LiF layer in Alq₃, we obtain an lectroluminescent efficiency increase by a factor of two with respect to the control devices without a LiF blocking layer. By using a 10nm dye doped Alq₃ sensor layer, we prove that LiF can block holes and excitons effectively. Experimental results suggest that the thin LiF layer may be a good hole and exciton blocking layer.

Keywords: 78.60.Fi 85.60.Jb

Received: 28 November 2006 Published: 08 February 2007

PACS:	78.60.Fi	(Electroluminescence)
	85.60.Jb	(Light-emitting devices)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2007/V24/I3/0828

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	LIAN Jia-Rong
	YUAN Yong-Bo
	ZHOU Xiang

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