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Off-stoichiometry determination of II-VI bulk crystals (Articolo in rivista)

Type

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Off-stoichiometry determination of II-VI bulk crystals (Articolo in rivista) (literal)

Anno

Alternative label

Zappettini A.; Spano N.; Mazzera M.; Guadalupi G.; Paorici C. (2008)
Off-stoichiometry determination of II-VI bulk crystals
in Journal of crystal growth
(literal)

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In: Journal of Crystal Growth, vol. 310 pp. 2080 - 2084. Elsevier B.V, 2008. (literal)

Note

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CNR-IMEM, Parma, CNR-IMEM, Parma and Venezia Tecnologie, Porto Marghera, VE, CNR-IMEM, Parma and Dipartimento di Fisica, Università di Parma (literal)

Titolo

Abstract

The measurement of impurity concentration in compound semiconductors reaches extremely high sensitivity. On the contrary, the methods for off-stoichiometry determination in II-VI crystals are not satisfactory. Some of the authors developed (in the past) a method for determining the off-stoichiometry in CdTe crystals measuring the high-temperature optical densities of vapors in equilibrium with solid samples. Thanks to accurate calibrations, the partial pressure of the vapor/solid systems could be derived and exploited to evaluate the sample off-stoichiometry. In the present work, the calibration procedures are shown for the determination of partial pressure for sulfides and selenides. The off-stoichiometry is derived for ZnTe, CdS and CdSe samples and the method effectiveness is confirmed. (literal)

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