The photoluminescence (PL) spectra of the undoped ZnO films deposited on Si substrates by dc reactive sputtering have been studied. There are two emission peaks, centered at 3.18 eV (UV) and 2.38 eV (green). The variation of these peak intensities and that of the I–V properties of the ZnO/Si heterojunctions were investigated at different annealing temperatures and atmospheres. The defect levels in ZnO films were also calculated using the method of full-potential linear muffin-tin orbital. It is concluded that the green emission corresponds to the local level composed by oxide antisite defect OZn rather than oxygen vacancy VO, zinc vacancy VZn, interstitial zinc Zni, and interstitial oxygen Oi.

1.
D. M.
Bagnall
,
Y. F.
Chen
,
Z.
Zhu
,
T.
Yao
,
S.
Koyama
,
M. Y.
Shen
, and
T.
Goto
,
Appl. Phys. Lett.
70
,
2230
(
1997
).
Google Scholar
 
2.
H.
Cao
,
Y. G.
Zhao
,
S. T.
Ho
,
E. W.
Seeling
,
Q. H.
Wang
, and
R. P. H.
Chang
,
Phys. Rev. Lett.
82
,
2278
(
1999
).
Google Scholar
 
3.
P.
Zu
,
Z. K.
Tang
,
G. K. L.
Wong
,
M.
Kawasaki
,
A.
Ohtomo
,
H.
Koinuma
, and
Y.
Segawa
,
Solid State Commun.
103
,
456
(
1997
).
Google Scholar
 
4.
S.
Cho
,
J.
Ma
,
Y.
Kim
,
Y.
Sun
,
G. K. L.
Wang
, and
J. B.
Ketterson
,
Appl. Phys. Lett.
75
,
2761
(
1999
).
Google Scholar
 
5.
G.
Changxin
,
F.
Zhuxi
, and
S.
Chaoshu
,
Chin. Phys. Lett.
16
,
146
(
1999
).
Google Scholar
 
6.
E. G.
Bylander
,
J. Appl. Phys.
49
,
1188
(
1978
).
Google Scholar
 
7.
K.
Vanheusden
,
C. H.
Seager
,
W. L.
Warren
,
D. R.
Tallant
, and
J. A.
Voiget
,
Appl. Phys. Lett.
68
,
403
(
1996
).
Google Scholar
 
8.
M.
Liu
,
A. H.
Kitai
, and
P.
Mascher
,
J. Lumin.
54
,
35
(
1992
).
Google Scholar
 
9.
Z.
Fu
,
B.
Lin
,
G.
Liao
, and
Z.
Wu
,
J. Cryst. Growth
193
,
316
(
1998
).
Google Scholar
 
10.
K.
Vanheusden
,
W. L.
Warren
,
C. H.
Seager
,
D. R.
Tallant
,
J. A.
Voigt
, and
B. E.
Gnade
,
J. Appl. Phys.
79
,
7983
(
1996
).
Google Scholar
 
11.
K.
Ogsata
,
K.
Sakurai
,
Sz.
Fujita
,
Sg.
Fujita
, and
K.
Matsushige
,
J. Cryst. Growth
214/215
,
312
(
2000
).
Google Scholar
 
12.
Y. M. Sun, Ph.D. thesis, University of Science and Technology of China, July, 2000.
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2001
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