Optical properties of the ternary compound Cd x Hg1?i>x Se:Co

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• 作者：S. Yu. Paranchich ; L. D. Paranchich ; M. D. Andriichuk ; V. R. Romanyuk ; V. N. Makogonenko ; Yu. V. Tanasyuk and T. A. Mel’nichuk
• 关键词：optical properties ; solid solution ; resonance level ; cobalt ion
• 刊名：Journal of Applied Spectroscopy
• 出版年：2007
• 出版时间：January, 2007
• 年：2007
• 卷：74
• 期：1
• 页码：81-85
• 全文大小：77 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Atomic and Molecular Structure and Spectra
  Analytical Chemistry
  Russian Library of Science
  
• 出版者：Springer New York
• ISSN：1573-8647

文摘

We present the results of experimental studies of the optical properties of cobalt-doped Cd _x H_1?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 Hg_1?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 N_Co < 5·1018 cm?3. For N_Co ～ 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%.