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Effects of misfit strain on properties of ZnO films grown by pulsed laser deposition

Published online by Cambridge University Press:  17 March 2011

M.C. Park ,
W.H. Yoon ,
D.H. Lee ,
J.M. Myoung ,
S.H. Bae ,
S.Y. Lee  and
I. Yun
M.C. Park
Affiliation:
Information & Electronic Materials Laboratory, Dept. of Metallurgical Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Korea
W.H. Yoon
Affiliation:
Information & Electronic Materials Laboratory, Dept. of Metallurgical Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Korea
D.H. Lee
Affiliation:
Information & Electronic Materials Laboratory, Dept. of Metallurgical Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Korea
J.M. Myoung
Affiliation:
Information & Electronic Materials Laboratory, Dept. of Metallurgical Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Korea
S.H. Bae
Affiliation:
Dept. of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Korea
S.Y. Lee
Affiliation:
Dept. of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Korea
I. Yun
Affiliation:
Dept. of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Korea
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Abstract

A series of ZnO films with various thicknesses were prepared on (0001) sapphire substrate by pulsed laser deposition (PLD). Scanning electron microscopy (SEM) and x-ray diffraction (XRD) analysis were utilized to investigate the effects of misfit strain on the surface morphology and the crystallinity. The electrical and optical properties of the films were also investigated as a function of the film thickness. It was found that the crystalline quality, electrical and optical properties of the films depended on the film thickness and were improved with increasing the film thickness. This is attributed to the fact that the films thinner than 400 nm are under the severe misfit strain, which decreases as the film thickness increases further.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 696: Symposium N – Current Issues in Heteroepitaxial Growth--Stress Relaxation and Self Assembly , 2001 , N3.25
Copyright
Copyright © Materials Research Society 2002

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