Solid↔liquid Cd(Zn)Te phase transition correlative analysis

Shcherbak, L.; Kopach, O.; Fochuk, P.

doi:10.1016/j.jcrysgro.2011.01.002

Cited by 4 publications

(4 citation statements)

References 18 publications

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“…4, b). Compared with data from [5], they are close to values for the CdTe + 2 mol. % In alloy (see insert in fig.…”

Section: Srnl-stisupporting

confidence: 75%

“…In addition, in Fig. 6 we plotted the same data from [5] for melting parameters of pure CdTe and weakly doped by In, Ge, Sn. All the data visualize the clear relationship between the thermodynamic parameters of melting process of the solid phase based on CdTe.…”

Section: Srnl-stimentioning

confidence: 99%

“…Such correlation is known as the compensation effect (CEF) governed by the Meyer-Neldel rule (MNR) [2,3]. This phenomenon has already been investigated for diffusion [4] and melting/crystallization processes [5,6] in pure CdTe and CdTe-based ternary solid solutions. In the present work we investigate CEF in more complex CdTe-based solid solutions, namely Cd1-x-yMnxZnyTe.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamics and crystal growth of Cd1-x-yMnxZnyTe (x=0.10, 0.20, y=0.15)

Kopach

Shcherbak

et al. 2021

Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIII

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In this work the structural, optical and electrical properties of Cd1-x-yMnxZnyTe single crystals (x=0.10, 0.20, y=0.15) grown by the vertical Bridgman method were investigated. Based on differential thermal analysis (DTA) results, it was found that the crystallization rate increases as the crystallization temperature (Ts) decreases. It is determined that the volume fraction of solid phase in Cd0.75Mn0.10Zn0.15Te and Cd0.65Mn0.20Zn0.15Te alloys decrease to a minimum in the temperature ranges 1366-1389 K and 1363-1388 K, respectively. The activation energies of melting and crystallization processes for these alloys under different conditions are established. The linear character of the dependence between the preexponential factor (lnϕsol.phase,0 and lnVmelt., sol. phase,0) and the activation energy of these processes is determined, which is evidence of a compensation effect. The band-gap value was estimated to be ~ 1.73 eV for Cd0.75Mn0.10Zn0.15Te and ~1.84 eV for Cd0.65Mn0.20Zn0.15Te at 300 K. Typical transmission images showed the presence of small Te inclusions (5-10 µm) in the crystals. The electrical resistivity, obtained from the I-V curves, was ~10 4 Ώ•cm for both crystals and decreased slightly toward the end of the ingots.

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“…4, b). Compared with data from [5], they are close to values for the CdTe + 2 mol. % In alloy (see insert in fig.…”

Section: Srnl-stisupporting

confidence: 75%

Section: Srnl-stimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamics and crystal growth of Cd1-x-yMnxZnyTe (x=0.10, 0.20, y=0.15)

Kopach

Shcherbak

et al. 2021

Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIII

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“…The crystallization rate is inversely proportional to the duration of the crystallization process. It can be estimated as a reverse value of the difference between the time of crystallization peak maximum t cryst peak and the start time of the crystallization process t cryst start 34,35 = − V t t…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Melting and Crystallization Features of CsPbBr₃ Perovskite

Kanak

Kopach

Kanak

et al. 2022

Crystal Growth & Design

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The all-inorganic perovskite cesium lead bromide (CsPbBr 3 ) has attracted considerable attention as a promising material for optoelectronics and high-energy radiation detectors. In order to obtain a bulk single crystal from a melt, it is crucial to understand the peculiarities of melting and crystallization processes. Here, the solid−liquid and liquid−solid phase transitions were studied by differential thermal analysis at different heating/cooling rates (0.1, 1, 3, 5, and 10 °C/min). A two-stage melting mechanism of CsPbBr 3 perovskite was proposed. The critical maximal sample temperature (T critical ) was determined for each heating rate. If the sample was heated to a temperature below T critical , the crystallization occurred at a temperature higher than the melting point. Contrarily, if the sample was heated to a temperature higher than this critical value, the melt crystallization occurred with supercooling. We believe that such crystallization features are closely related to the melt structure, which changes during the sample heating. The activation energies of melting and crystallization processes of CsPbBr 3 were determined to be 1846 and 1940 kJ/mol, respectively. For the first time, this study demonstrates the impact of heating and cooling conditions on the melting and crystallization processes of the bulk CsPbBr 3 . It is significant for gaining a fundamental understanding of the crystal growth and fabrication of high-quality monocrystalline materials.

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Phase Transformations in Cd0.96Mn0.04Te0.98Se0.02 Solid Solutions

Kopach,

Fochuk

et al. 2024

J. Phase Equilib. Diffus.

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Solid↔liquid Cd(Zn)Te phase transition correlative analysis

Cited by 4 publications

References 18 publications

Thermodynamics and crystal growth of Cd1-x-yMnxZnyTe (x=0.10, 0.20, y=0.15)

Thermodynamics and crystal growth of Cd1-x-yMnxZnyTe (x=0.10, 0.20, y=0.15)

Melting and Crystallization Features of CsPbBr₃ Perovskite

Phase Transformations in Cd0.96Mn0.04Te0.98Se0.02 Solid Solutions

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Solid↔liquid Cd(Zn)Te phase transition correlative analysis

Cited by 4 publications

References 18 publications

Thermodynamics and crystal growth of Cd1-x-yMnxZnyTe (x=0.10, 0.20, y=0.15)

Thermodynamics and crystal growth of Cd1-x-yMnxZnyTe (x=0.10, 0.20, y=0.15)

Melting and Crystallization Features of CsPbBr3 Perovskite

Phase Transformations in Cd0.96Mn0.04Te0.98Se0.02 Solid Solutions

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Melting and Crystallization Features of CsPbBr₃ Perovskite