Optical properties of the ternary compound Cd x Hg1-x Se:Co

Details Optical properties of the ternary compound Cd x Hg1-x Se:Co Optical properties of the ternary compound Cd x Hg1-x Se:Co

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007japsp..74...81p&link_type=abstract

Journal of Applied Spectroscopy, Volume 74, Issue 1, pp.81-85

Physics

Optical Properties, Solid Solution, Resonance Level, Cobalt Ion

Scientific paper

We present the results of experimental studies of the optical properties of cobalt-doped Cd x H1-x Se (x = 0.18) single crystals with cobalt ion concentrations of NCo = 5·1018, 5·1019, and 1·1020 cm-3 at T = 90 K and 300 K. The composition (x = 0.18) of the Cd x Hg1-x Se solid solution was selected so that the hypothetical resonance level is found on the bottom of the conduction band. We show that the cobalt ions in the mercury selenide can form a resonance donor level only for cobalt concentrations NCo < 5·1018 cm-3. For NCo ˜ 5·1018 cm-3, the cobalt ions substitute for mercury atoms, forming a solid solution and leading to an increase in the bandgap width and a change in the physical properties. The solubility of cobalt in the HgSe lattice can be greater than 5% 10%.

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