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- 1. Physica B 340, 362 (2003) , Elsevier , “Deep levels in rhodium-doped p-type MOCVD GaAs ”, A. Majid, M. Zafar Iqbal, A. Dadgar, D. Bimbergp-type GaAs epilayers grown by metal-organic chemical vapour deposition (MOCVD) technique, doped in situ with rhodium (Rh) impurity, have been studied by deep level transient spectroscopy (DLTS). A composite peak consisting of emission signals from at least two deep levels in the lower-half band gap is identified with Rh. This peak is resolved using double-correlation DLTS (DDLTS) measurements, providing the clear energy positions of the Rh-related deep levels as Ev+0.35 eV and Ev+0.51 eV. Emission rate signatures and other parameters are reported for these deep levels. They are observed to show electric-field dependent emission signatures. No significant minority carrier (electron) deep level could be clearly identified with Rh due to the presence of significant inadvertent features in the injection DLTS spectrum. Results are compared with our earlier study of Rh-doped, n-type, MOCVD GaAs. (Read more)
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Updated at 2010-07-20 16:50:39
Updated at 2010-07-20 16:50:39
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