Phase Diagram of the Zn-Cd-Te Ternary System

Steininger, Jacques; Strauss, A. J.; Brebrick, R. F.

doi:10.1149/1.2407297

Cited by 106 publications

(32 citation statements)

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“…(18) and rewriting (11), assuming the solid solution to be regular (i. e. I1Gxs = Wy(1-y)), we obtain the system for the ternary liquidus and solidus surfaces : [18]- [20]. We use the more recent work of'Steininger, Strauss and Brebrick [15] because it is supposed to be the most reliable and because it includes the study of the complete ternary system. The previously indicated works are in agreement for the metal-rich part of the liquidus of ZnTe and CdTe.…”

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Thermodynamics and phase diagram calculations in II-VI and IV-VI ternary systems using an associated solution model

Laugier

1973

Rev. Phys. Appl. (Paris)

136

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To cite this version:A. Laugier. Thermodynamics and phase diagram calculations in II-VI and IV-VI ternary systems using an associated solution model. Revue de Physique Appliquee, 1973, 8 (3) Abstract. 2014 The thermodynamic properties and the T-x phase diagrams for liquid-solid equilibrium in II-VI and IV-VI ternary systems are described by a regular associated liquid solution model derived from that used by Jordan for ZnTe and CdTe and by the regular approximation for the solid solution. For the pseudo-binary systems exhibiting miscibility in both phases and monotonic variation of the liquidus and solidus curves, a general expression is obtained. It is independent of the interactions in the liquid, and is the same as for ideal non associated liquids. In the calculation of the ternary T-x phase diagrams five parameters are needed : the two interaction parameters 03B11, 03B12, the two coefficients of dissociation, 03B21, 03B22, obtained from the respective binary liquidus, and the interaction parameter W in the solid, derived from the pseudo-binary phase diagrams. Good agreement with experimental data is obtained for the pseudo-binary systems : ZnTe-CdTe, ZnTe-HgTe, ZnSe-ZnTe, CdTe-HgTe, CdTe-CdSe, HgTe-HgSe, PbSe-PbTe, PbTe-SnTe, and for the ternary systems : Zn-Cd-Te and Pb-Sn-Te. The theory is especially suited for the case 03B2 ~ 0 and 03B1 is small. It is applied to the calculation of the chalcogen-rich part of the ternary systems : Cd-Hg-Te and Cd-Se-Te.

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“…(8) figure 11 is the estimated two-liquid region. However no experimental evidence of liquid immiscibility in the Zn-Te system has been found despite thorough re-investigations [15].…”

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Thermodynamics and phase diagram calculations in II-VI and IV-VI ternary systems using an associated solution model

Laugier

1973

Rev. Phys. Appl. (Paris)

136

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“…The eutectic reaction temperature in the Cd-CdTe portion was reported by Kobayashi. 12 The melting temperature for CdTe was extensively measured by Kobayashi, 12 Lawson et al, 13 DeNobel, 14 Lorenz, 15 Steininger et al, 17 Mason and O'Kane, 20 Gromakov et al, 21 and Sysoev et al 22 The enthalpies of formation of CdTe were reported by Yamaguchi et al, 8 Lorenz, 15 Pool, 23 Robinson and Leach, 24 Agarwal et al, 25 McAteer and Seltz, 26 Shamsuddin and Nasar, 27 Brebrick and Strauss, 28 Robinson and Bever, 29 Rugg et al, 30 Amzil et al, 31 Terpilowski and Ratajzak, 32 Zabdyr, 33 Korneeva et al, 34 Goldfinger and Jeunehomme, 35 and Vanyukov et al 36 The enthalpies of mixing for the liquid phase were reported by Yamaguchi et al 8 and Amzil et al 31 The partial pressures of Cd (gas) and Te 2 (gas) in equilibrium with the liquid + CdTe two-phase mixtures at various temperatures were measured by DeNobel, 14 Lorenz, 15 Brebrick 18 and Shiozawa and Jost. 37 These data can be converted into the activities of Cd and Te in the liquid phase along the liquidus by the following equations:…”

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Thermodynamic Descriptions for the Cd-Te, Pb-Te, Cd-Pb and Cd-Pb-Te Systems

Liu

Zhang

Yu³

2009

Journal of Elec Materi

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The thermodynamic behaviors of the Cd-Te, Pb-Te, Cd-Pb and Cd-Pb-Te systems are critically analyzed in this work by means of the calculation of phase diagrams (CALPHAD) method. The liquid phases containing Te are described by the associated solution model, which is capable of dealing with V-shaped curves of mixing enthalpies in solution phases, sharp maxima of liquidus curves in phase diagrams, and abrupt changes in activity plots. The binary compounds, CdTe and PbTe, are considered to be stoichiometric in the two binary systems, but they form a line compound described by (Cd,Pb) 1 (Te) 1 in the ternary system. The fcc phase, in which only Cd and Pb elements are present, is treated with the substitutional solution model. The experimental data available in the literature are extensively assessed, from which the thermodynamic parameters necessary for each phase are obtained. Various calculated phase equilibria and thermodynamic properties are compared with the experimental data. The excellent agreement indicates that this work contributes to the study of phase stabilities in the Cd-Pb-Te system.

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“…While the segregation coefficient of zinc in (Cd,Zn)Te is as high as 1.35 [1], for (Cd,Mn)Te the segregation coefficient of manganese practically equals 1 [2], which means nearly no segregation of Mn. This is why the homogeneous Mn content can be obtained for larger size of the (Cd,Mn)Te plates, as compared with the (Cd,Zn)Te plates with homogeneous Zn content.…”

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confidence: 96%

Semi‐insulating (Cd,Mn)Te:V crystals: Electrical contacts

Witkowska-Baran¹,

Mycielski²,

Szadkowski³

et al. 2007

Physica Status Solidi (b)

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The high-resistivity (Cd,Mn)Te is believed to be suitable to succesfully replace the commonly used (Cd,Zn)Te system as a material for manufacturing large-area X-and γ-ray detectors. The purpose of our study was to elaborate a method of preparing high quality (Cd,Mn)Te crystal plates as well as a technique of producing good electrical contacts to that material. (Cd,Mn)Te was grown using the Bridgman method. The crystals were doped with vanadium to the level of 10 16 cm -3 . The crystals are twinned in the (111) plane, but by slicing the crystal parallel to the twinning plane we obtained monocrystalline plates of large area (e.g. 30 × 30 mm 2 ), which is essential for application purposes. Proper annealing of those plates in cadmium vapours allowed us to reduce the number of cadmium vacancies forming during the growth process. Due to the vanadium dopant acting as a compensating centre we obtained a semi-insulating material. In order to obtain good contacts to the (Cd,Mn)Te plates we used the method proposed initially for CdTe by Rioux et al. The ZnTe : Sb layers (~1 µm thick) were grown on the epi-ready (Cd,Mn)Te : V plates by the MBE technique. The grown layers were p-type and formed a good electrical contact to the crystal plates. Finally -a standard technique was used to cover the ZnTe layer by a metal layer. The contacts formed on (111) surfaces of (Cd,Mn)Te were studied. We believe that the contacts to the (111) surface are important for applications. In the paper we describe techniques of preparing electrical contacts and results of their characterization.

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Phase Diagram of the Zn-Cd-Te Ternary System

Cited by 106 publications

References 15 publications

Thermodynamics and phase diagram calculations in II-VI and IV-VI ternary systems using an associated solution model

Thermodynamics and phase diagram calculations in II-VI and IV-VI ternary systems using an associated solution model

Thermodynamic Descriptions for the Cd-Te, Pb-Te, Cd-Pb and Cd-Pb-Te Systems

Semi‐insulating (Cd,Mn)Te:V crystals: Electrical contacts

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