Thermodynamic analysis and single crystal growth of ZnSe from ZnSe-N-H-Cl system

Changyou Liu; Wanqi Jie

doi:10.1021/cg070337d

Thermodynamic analysis and single crystal growth of ZnSe from ZnSe-N-H-Cl system

Changyou Liu, Wanqi Jie

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

The thermodynamic properties of the transporting reactions in the closed-tube ZnSe-N-H-Cl system are analyzed by solving a set of equations with numerical methods, where NH₄Cl serves as the transport agent. The results show that ZnSe-NH₄Cl system has the properties of high total pressure and low transporting reaction equilibrium constant. The decomposition of hydrogen selenide determines the difference between the partial pressures of ZnCl₂ and H₂Se, which slows down the growth rate. This difference can be adjusted by adding extra Se and the hydrogen (H₂) produced through decomposition of NH₃. The ZnCl₂ and a little extra Se should be added into the ZnSe-NH₄Cl system to improve the utilizing efficiency of HZ and the concentration of practical transporting components of ZnCl₂ and H₂Se. A ZnSe single crystal as large as 20 × 15 × 8 mm³ was obtained by using ZnCl ₂·2NH₄Cl as the transport agent with a little extra Se at about 1300 K. The experimental results about the diffusion-limited transport rate are well coincided to the thermodynamical analysis.

Original language	English
Pages (from-to)	3532-3536
Number of pages	5
Journal	Crystal Growth and Design
Volume	8
Issue number	10
DOIs	https://doi.org/10.1021/cg070337d
State	Published - Oct 2008

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title = "Thermodynamic analysis and single crystal growth of ZnSe from ZnSe-N-H-Cl system",

abstract = "The thermodynamic properties of the transporting reactions in the closed-tube ZnSe-N-H-Cl system are analyzed by solving a set of equations with numerical methods, where NH4Cl serves as the transport agent. The results show that ZnSe-NH4Cl system has the properties of high total pressure and low transporting reaction equilibrium constant. The decomposition of hydrogen selenide determines the difference between the partial pressures of ZnCl2 and H2Se, which slows down the growth rate. This difference can be adjusted by adding extra Se and the hydrogen (H2) produced through decomposition of NH3. The ZnCl2 and a little extra Se should be added into the ZnSe-NH4Cl system to improve the utilizing efficiency of HZ and the concentration of practical transporting components of ZnCl2 and H2Se. A ZnSe single crystal as large as 20 × 15 × 8 mm3 was obtained by using ZnCl 2·2NH4Cl as the transport agent with a little extra Se at about 1300 K. The experimental results about the diffusion-limited transport rate are well coincided to the thermodynamical analysis.",

author = "Changyou Liu and Wanqi Jie",

year = "2008",

month = oct,

doi = "10.1021/cg070337d",

language = "英语",

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journal = "Crystal Growth and Design",

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publisher = "American Chemical Society",

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T1 - Thermodynamic analysis and single crystal growth of ZnSe from ZnSe-N-H-Cl system

AU - Liu, Changyou

AU - Jie, Wanqi

PY - 2008/10

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N2 - The thermodynamic properties of the transporting reactions in the closed-tube ZnSe-N-H-Cl system are analyzed by solving a set of equations with numerical methods, where NH4Cl serves as the transport agent. The results show that ZnSe-NH4Cl system has the properties of high total pressure and low transporting reaction equilibrium constant. The decomposition of hydrogen selenide determines the difference between the partial pressures of ZnCl2 and H2Se, which slows down the growth rate. This difference can be adjusted by adding extra Se and the hydrogen (H2) produced through decomposition of NH3. The ZnCl2 and a little extra Se should be added into the ZnSe-NH4Cl system to improve the utilizing efficiency of HZ and the concentration of practical transporting components of ZnCl2 and H2Se. A ZnSe single crystal as large as 20 × 15 × 8 mm3 was obtained by using ZnCl 2·2NH4Cl as the transport agent with a little extra Se at about 1300 K. The experimental results about the diffusion-limited transport rate are well coincided to the thermodynamical analysis.

AB - The thermodynamic properties of the transporting reactions in the closed-tube ZnSe-N-H-Cl system are analyzed by solving a set of equations with numerical methods, where NH4Cl serves as the transport agent. The results show that ZnSe-NH4Cl system has the properties of high total pressure and low transporting reaction equilibrium constant. The decomposition of hydrogen selenide determines the difference between the partial pressures of ZnCl2 and H2Se, which slows down the growth rate. This difference can be adjusted by adding extra Se and the hydrogen (H2) produced through decomposition of NH3. The ZnCl2 and a little extra Se should be added into the ZnSe-NH4Cl system to improve the utilizing efficiency of HZ and the concentration of practical transporting components of ZnCl2 and H2Se. A ZnSe single crystal as large as 20 × 15 × 8 mm3 was obtained by using ZnCl 2·2NH4Cl as the transport agent with a little extra Se at about 1300 K. The experimental results about the diffusion-limited transport rate are well coincided to the thermodynamical analysis.

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U2 - 10.1021/cg070337d

DO - 10.1021/cg070337d

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JO - Crystal Growth and Design

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Thermodynamic analysis and single crystal growth of ZnSe from ZnSe-N-H-Cl system

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