Effect of antimony incorporation on structural properties of CuInS₂ crystals

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• 作者：M. Ben Rabeh ; N. Chaglabou ; M. Kanzari
• 关键词：Chalcopyrite ; CIS ; Doping ; Crystals ; Structural properties
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2010
• 出版时间：February 2010
• 年：2010
• 卷：268
• 期：3-4
• 页码：273-276
• 全文大小：455 K

文摘

CuInS₂ (CIS) single crystals doped with 1, 2, 3 and 4 atomic percent (at. % ) of antimony (Sb) were grown by the horizontal Bridgman method. The effect of Sb doping on the structural properties of CIS crystal was studied by means of X-ray diffraction (XRD), energy dispersive X-ray analysis (EDAX), scanning electron microscopy (SEM) and PL measurements. X-ray diffraction data suggests that the doping of Sb in the CIS single crystals does not affect the tetragonal (chalcopyrite) crystal structure and exhibited a (1 1 2) preferred orientation. In addition, with increasing Sb concentration, the X-ray diffraction analysis show that Sb doped CIS crystals are more crystallized and the diffraction peaks of the CuInS₂ phase were more pronounced in particular the (1 1 2) plane. EDAX study revealed that Sb atoms can occupy the indium site and/or occupying the sulfur site to make an acceptor. PL spectra of undoped and Sb doped CIS crystals show two emission peaks at 1.52 and 1.62 eV, respectively which decreased with increasing atomic percent antimony. Sb doped CIS crystals show p-type conductivity.