Submitted on: 17 May 2010.
Revised on: 01 August 2010.
Accepted on: 20 September 2010.
___________________Journal of Semiconductors---IOP PUBLISHING LTD
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Submitted on: 13 October 2006.
Revised on: 19 January 2007.
Accepted on: 11 March 2007.
___________________Journal of Semiconductors---IOP PUBLISHING LTD
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Submitted on: 28 May 1999.
Revised on: 06 August 1999.
Accepted on: 25 August 1999.
___________________Journal of Semiconductors---IOP PUBLISHING LTD
Submitted on: 01 October 2018.
Revised on: 13 January 2019.
Accepted on: 05 March 2019.
___________________Journal of Semiconductors---IOP PUBLISHING LTD
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