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Visible Luminescence Related to Defects in ZnO

Published online by Cambridge University Press:  01 February 2011

Michael A. Reshchikov
Affiliation:
mreshchi@vcu.edu, Virginia Commonwealth University, Department of Physics, 1020 West Main Street, Richmond, VA, 23284, United States, 804-828-1613, 804-828-7073
B. Nemeth
Affiliation:
bnemeth@cermetinc.com, Cermet, Inc., Atlanta, GA, 30318, United States
J. Nause
Affiliation:
jnause@cermetinc.com, Cermet, Inc., Atlanta, GA, 30318, United States
J. Xie
Affiliation:
xie@svta.com, SVT Associates, Inc., Eden Prairie, MN, 55344, United States
B. Hertog
Affiliation:
hertog@svta.com, SVT Associates, Inc., Eden Prairie, MN, 55344, United States
A. Osinsky
Affiliation:
osinsky@svta.com, SVT Associates, Inc., Eden Prairie, MN, 55344, United States
V. Avrutin
Affiliation:
vavrutin@vcu.edu, Virginia Commonwealth University, Department of Electrical Engineering, Richmond, VA, 23284, United States
N. Izyumskaya
Affiliation:
nizyumskaya@vcu.edu, Virginia Commonwealth University, Department of Electrical Engineering, Richmond, VA, 23284, United States
R. Shimada
Affiliation:
rshimada@vcu.edu, Virginia Commonwealth University, Department of Electrical Engineering, Richmond, VA, 23284, United States
H. Morkoc
Affiliation:
hmorkoc@vcu.edu, Virginia Commonwealth University, Department of Electrical Engineering, Richmond, VA, 23284, United States
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Abstract

We studied several photoluminescence (PL) bands in undoped, Li-, Ga-, and N-doped high-quality ZnO bulk crystals and thin films grown by molecular beam epitaxy (MBE). By analyzing PL in a wide range of excitation power densities, sample temperature, and decay time after a laser pulse, we distinguished and analyzed more than 10 broad bands with unique luminescence properties. Among these bands, only the Cu-related green band with a characteristic fine structure and the Li-related orange band were well-studied and reliably identified in the past.

Type
Research Article
Copyright
Copyright © Materials Research Society 2008

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Visible Luminescence Related to Defects in ZnO
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