The Properties of n-ZnO/p-SiC Heterojunctions and their Potential Applications for Devices

Abstract:

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Heteroepitaxial n-ZnO films have been grown on commercial p-type 6H-SiC substrates by plasma-assisted molecular-beam epitaxy, and n-ZnO/p-SiC heterojunction mesa structures have been fabricated and their photoresponse properties have been studied. Current-voltage characteristics of the structures had a very good rectifying diode-like behavior with a leakage current less than 2 x 10-4 A/cm2 at -10 V, a breakdown voltage greater than 20 V, a forward turn on voltage of ∼5 V, and a forward current of ∼2 A/cm2 at 8 V. Photosensitivity of the diodes, when illuminated from ZnO side, was studied at room temperature and photoresponsivity of as high as 0.045 A/W at -7.5 V reverse bias was observed for photon energies higher than 3.0 eV.

Info:

Periodical:

Materials Science Forum (Volumes 527-529)

Edited by:

Robert P. Devaty, David J. Larkin and Stephen E. Saddow

Pages:

1571-1574

DOI:

10.4028/www.scientific.net/MSF.527-529.1571

Citation:

C. W. Litton et al., "The Properties of n-ZnO/p-SiC Heterojunctions and their Potential Applications for Devices", Materials Science Forum, Vols. 527-529, pp. 1571-1574, 2006

Online since:

October 2006

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$35.00

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