Reduction of Micro-Cracks in Large Diameter InxGa1-xSb Bulk Crystals.

Vogel, J. ; Dutta, P. S.

Technical Information Center Oak Ridge Tennessee

关键词: Alloys;    Crystal growth;    Cross sections;    Semiconductors;    Ternary;   

RP-ID  :  DE2004821510

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The ternary alloy, In(sub x)Ga(sub 1-x)Sb, is a compound semiconductor of tunable bandgap in the range of 0.18-0.72 eV, making it useful for infrared range optoelectronic devices. Utilizing a unique system based upon vertical Bridgman technique, large diameter (50 millimeter) In(sub x)Ga(sub 1-x)Sb polycrystals of composition ranging in x from 0.015 to 0.988 were grown. Methods of mixing the melt during solidification, including the accelerated crucible rotation technique (ACRT), have been used in conjunction with optimization of the furnace temperature gradient profile to significantly reduce micro-cracking in the crystal boules while accelerating the growth rate from less than a millimeter per hour to three millimeters per hour. In this paper, the experimental system and crystal growth parameters for a set of ternary experiments will be detailed.