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Journal of Applied Physics : Ferromagnetic Cu doped ZnO as an electron injector in heterojunction light emitting diodes

By T. S. Herng, S. P. Lau, S. F. Yu, S. H. Tsang, K. S. Teng et al

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Book Id: WPLBN0002169318
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 18 November 2008

Title: Journal of Applied Physics : Ferromagnetic Cu doped ZnO as an electron injector in heterojunction light emitting diodes  
Author: T. S. Herng, S. P. Lau, S. F. Yu, S. H. Tsang, K. S. Teng et al
Volume: Issue : November 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Journal of Applied Physics Collection
Historic
Publication Date:
Publisher: American Institute of Physics

Description
Description: Ferromagnetic and highly conductive copper doped ZnO (ZnO:Cu) films were prepared by filtered cathodic vacuum arc technique. By employing a biasing technique during growth, the electron concentration and resistivity of the ZnO:Cu films can be as high as 1020 cm−3 and 5.2×10−3 Ω cm, respectively. The ferromagnetic behavior is observed in all the conductive films, but its magnetization is quenched with an increment in carrier concentration, suggesting that carrier induced exchange is not directly responsible for the ferromagnetism. Heterojunction light emitting diodes have been fabricated using the conductive ZnO:Cu layer as an electron injector and a p-type GaN as hole injector. Electroluminescence can be detected from the devices.

 
 



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