TY - JOUR
T1 - Electrical and optical properties of Cu- and Ga-doped Hg 1-xCdxTe layers grown by liquid-phase epitaxy
AU - Sarusi, G.
AU - Zemel, A.
AU - Eger, D.
AU - Shapira, Yoram
PY - 1989
Y1 - 1989
N2 - The influence of Cu (acceptor) and Ga (donor) on the electrical and optical properties of Hg1-xCdxTe (x=0.2) layers was investigated. The layers were grown by liquid-phase epitaxy from Te-rich solutions and the dopants were intentionally introduced during the growth process. Doping efficiencies between 0.025 at a hole concentration of p=6×10 18 cm-3 and 0.15 at p=6×1017 cm-3 were found for Cu. The electron concentration in the as-grown Ga-doped layers saturated at n=2×1017 cm-3, but increased significantly to n=8×1018 cm-3 as a result of an annealing process. The doping efficiency was 0.02. The doping and electrical properties of the layers are explained by assuming incorporation of both electrically active and electrically inactive impurity atoms. The high free electron concentrations in the Ga-doped layers resulted in a strong Burstein-Moss shift [T. S. Moss, G. J. Burrell, and B. Ellis, in Semiconductor Optoelectronics (Butterworths, London, 1973), p. 42] of the absorption edge, and effects of plasma frequency. These effects are analyzed and discussed.
AB - The influence of Cu (acceptor) and Ga (donor) on the electrical and optical properties of Hg1-xCdxTe (x=0.2) layers was investigated. The layers were grown by liquid-phase epitaxy from Te-rich solutions and the dopants were intentionally introduced during the growth process. Doping efficiencies between 0.025 at a hole concentration of p=6×10 18 cm-3 and 0.15 at p=6×1017 cm-3 were found for Cu. The electron concentration in the as-grown Ga-doped layers saturated at n=2×1017 cm-3, but increased significantly to n=8×1018 cm-3 as a result of an annealing process. The doping efficiency was 0.02. The doping and electrical properties of the layers are explained by assuming incorporation of both electrically active and electrically inactive impurity atoms. The high free electron concentrations in the Ga-doped layers resulted in a strong Burstein-Moss shift [T. S. Moss, G. J. Burrell, and B. Ellis, in Semiconductor Optoelectronics (Butterworths, London, 1973), p. 42] of the absorption edge, and effects of plasma frequency. These effects are analyzed and discussed.
UR - http://www.scopus.com/inward/record.url?scp=3843141481&partnerID=8YFLogxK
U2 - 10.1063/1.343102
DO - 10.1063/1.343102
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AN - SCOPUS:3843141481
SN - 0021-8979
VL - 65
SP - 672
EP - 676
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 2
ER -