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Highly Transparent and Conductive CdO Thin Films as Anodes for Organic Light-Emitting Diodes

Published online by Cambridge University Press:  01 February 2011

Yu Yang ,
Qinglan Huang ,
Andrew W. Metz ,
Shu Jin ,
Jun Ni ,
Lian Wang  and
Tobin J. Marks
Yu Yang
Affiliation:
Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL 60208-3113, USA
Qinglan Huang
Affiliation:
Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL 60208-3113, USA
Andrew W. Metz
Affiliation:
Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL 60208-3113, USA
Shu Jin
Affiliation:
Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL 60208-3113, USA
Jun Ni
Affiliation:
Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL 60208-3113, USA
Lian Wang
Affiliation:
Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL 60208-3113, USA
Tobin J. Marks
Affiliation:
Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL 60208-3113, USA
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Abstract

In this paper, CdO thin films are used for the first time as transparent anodes for organic light-emitting diodes (OLEDs). Highly conductive and transparent CdO thin films have been grown on glass and on single-crystal MgO(100) by low pressure metal-organic chemical vapor deposition (MOCVD) at 400°C, and were implemented in small-molecule OLED fabrication. Device response and applications potential have been investigated and compared with those of commercial ITO-based control devices. It is found that as-deposited CdO thin films are capable of injecting holes into such devices, rendering them promising anode materials for OLEDs. A maximum luminance of 32,000 cd/m2 and an external forward quantum efficiency of 1.4 %, with a turn-on voltage of 3.2 V are achieved on MgO(100)/CdO-based devices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 871: Symposium I – Organic Thin-Film Electronics , 2005 , I9.14
Copyright
Copyright © Materials Research Society 2005

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