SIMS STUDIES OF Cl-DOPED ZnSe EPILAYERS GROWN BY MBE
SURFACE REVIEW AND LETTERS(2012)
摘要
Chlorine is one of the most used species to produce n-type ZnSe epilayers. In this paper, we present Secondary Ton Mass Spectrometry (SIMS) profiles of a series of Cl-doped ZnSe samples, which were grown by Molecular Beam Epitaxy (MBE) technique on GaAs substrates. These profiles have been used to examine the limitation of SIMS analysis of narrow Cl-delta layers. In order to convert SIMS raw data to quantified data, the depth profile from a Cl-implanted standard sample has been used to estimate the "useful ion yield" of chlorine and thus the instrumental sensitivity for chlorine in a ZnSe matrix. The "useful ion yield" and detection limit of chlorine in the ZnSe host matrix were calculated to be 4.7 x 10(-7) and 5 x 10(17) atoms/cm(3), respectively.
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关键词
SIMS,MBE,GaAs,ZnSe
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