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Structural and Optical Studies of InGaN/GaN Superlattices Implanted with Eu Ions

Published online by Cambridge University Press:  07 February 2017

Jingzhou Wang ,
Venkata R. Thota ,
Eric A. Stinaff ,
Mohammad Ebdah ,
Andre Anders  and
Wojciech M. Jadwisienczak
Jingzhou Wang*
Affiliation:
School of Electrical Engineering and Computer Science, Ohio University, Athens OH 45701, U.S.A.
Venkata R. Thota
Affiliation:
Department of Physics and Astronomy, Ohio University, Athens, OH 45701, U.S.A.
Eric A. Stinaff
Affiliation:
Department of Physics and Astronomy, Ohio University, Athens, OH 45701, U.S.A.
Mohammad Ebdah
Affiliation:
Physics and Astronomy Department, King Saud University, Saudi Arabia.
Andre Anders
Affiliation:
Lawrence Berkeley National Laboratory, Plasma Applications Group, Berkeley, CA 94720, U.S.A.
Wojciech M. Jadwisienczak
Affiliation:
School of Electrical Engineering and Computer Science, Ohio University, Athens OH 45701, U.S.A.
*
*(Email: jw310007@ohio.edu)
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Abstract

In0.06Ga0.94N/GaN superlattices (SLs) grown on sapphire (0001) by metalorganic chemical vapor deposition were studied before and after europium (Eu) ion implantation to understand the strain induced-effects in the SL structure. The implanted SLs were investigated as a function of the thermal annealing temperature up to 1000 °C in nitrogen ambient. Temperature dependent photoluminescence spectra showed a red-shift of the SL emission peaks due the quantum confined Stark effect, followed by a blue-shift due to In atoms out-diffusion from the In0.06Ga0.94N quantum well, for both Eu ions implanted and unimplanted SLs. The amplitude of observed spectral shifts was smaller and the line width of the SLs emission peaks were narrower in the SLs:Eu3+ as compared to the unimplanted SLs. It is concluded that Eu3+ ions modified the strain in the SLs acting like impurity and/or defects getter in implantation degraded SLs resulting in material phase purification and improvements of SLs optical properties.

Keywords

nitrideannealingoptical properties

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Type
Articles
Information
MRS Advances , Volume 2 , Issue 3: Electronics, Magnetics and Photonics , 2017 , pp. 179 - 187
Copyright
Copyright © Materials Research Society 2017 

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