Efficient Top-Emitting Polymer Light-Emitting Diodes Using Chromium as Anode

Chin. Phys. Lett.

2007, Vol. 24

Issue (7): 2097-2100 DOI:

Original Articles

Efficient Top-Emitting Polymer Light-Emitting Diodes Using Chromium as Anode

HUANG Yong;XU Yun-Hua;XU Wei;ZHOU Jian-Gang;PENG Jun-Biao;CAO Yong

Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640Key Laboratory of Specially Functional Materials (Ministry of Education), South China University of Technology, Guangzhou 510640

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HUANG Yong, XU Yun-Hua, XU Wei et al 2007 Chin. Phys. Lett. 24 2097-2100

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Abstract We demonstrate a high efficiency top-emitting polymer light-emitting diode (TPLED) with chromium (Cr) taking as the anode. The TPLED structure is Cr/poly-3, 4-ethylenedioxythiophene (PEDOT:PSS)/poly [2-(4-3',7'-dimethyloctyloxy)-phenyl]-p-phenylenevinylene) (P-PPV)/Ba/Ag. The Cr (100nm) anode is prepared by sputter-depositing in a vacuum chamber. It is found that the device emissive properties are affected dramatically by the thickness of both PEDOT:PSS and the Ag cathode. Optimized thicknesses of PEDOT:PSS and Ag layer are 60nm and 15nm, respectively. The diode exhibits excellent electroluminescence (EL) properties, such as a turn-on voltage of 3.32V, luminous efficiency of 4.41cd/A and luminance of 6989cd/m² at driving
voltage of about 9V.

Keywords: 78.60.Fi 78.66.Qm 85.60.Jb

Received: 08 January 2007 Published: 25 June 2007

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

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2007/V24/I7/02097

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	HUANG Yong
	XU Yun-Hua
	XU Wei
	ZHOU Jian-Gang
	PENG Jun-Biao
	CAO Yong

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