ZnCl2-assisted Synthesis of ZnSe Polycrystal

J Mater Sci Technol ›› 2012, Vol. 28 ›› Issue (4): 373-378.

Special Issue: 光电材料专辑

• Regular Papers • Previous Articles Next Articles

ZnCl₂-assisted Synthesis of ZnSe Polycrystal

Changyou Liu, Tao Wang, Gangqiang Zha, Zhi Gu, Wanqi Jie

State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China

Received:2011-10-17 Revised:2012-01-09 Online:2012-04-30 Published:2012-04-24
Contact: Wanqi Jie
Supported by:
the National Natural Science Foundation of China, the National0097300 Project (No. 2011CB610406) of China, the Research Fund of Young Teachers for the Doctoral Program of Higher Education of China (No. 20106102120016) and the Independent Subject of State Key Laboratory of Solidification Processing (74-QP-2011).

Abstract

Abstract: A chemical-assisted element direct-reaction method is developed to synthesize ZnSe compound semiconductor material at a relatively low temperature (~1000 °C). ZnSe polycrystal was obtained in the closed-tube systems with Zn-Se, Zn-Se-Zn(NH₃)₂Cl₂, Zn-Se-NH₄Cl and Zn-Se-ZnCl₂. The as-synthesized samples were tested by X-ray diffraction (XRD), thermogravimetric analysis (TGA) and analyzed by thermodynamic numerical
method. The results demonstrate that the synthesis efficiency is higher than 99.96% for Zn-Se-ZnCl₂ system at around 1000 °C for 3 weeks. It also exhibits that not only temperature, but also low apparent ratio of volume and surface area of the source materials and higher ZnCl₂ content are required to achieve high synthesis efficiency. A SeCl transporting reaction synthesis process is proposed based on the thermodynamic analysis.

Key words: Crystallites, Growth from vapor, Zinc compounds, Semiconducting II-VI materials

CLC Number:

O613.52，O614.24，O642.4，O782

Changyou Liu, Tao Wang, Gangqiang Zha, Zhi Gu, Wanqi Jie. ZnCl₂-assisted Synthesis of ZnSe Polycrystal[J]. J Mater Sci Technol, 2012, 28(4): 373-378.

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ZnCl₂-assisted Synthesis of ZnSe Polycrystal

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