Effect of Cu/In molar ratio on the microstructural and optical properties of microcrystalline CuInS2 prepared by solvothermal route

被引：79

作者：

Das, Kajari ^{[1
]}

Panda, Subhendu K. ^{[1
]}

Gorai, Soma ^{[1
]}

Mishra, Pratima ^{[2
]}

Chaudhuri, Subhadra ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, India

[2] Reg Res Lab, Adv Mat Technol Dept, Bhubaneswar 760013, Orissa, India

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 10期

关键词：

semiconductors; Raman spectroscopy; optical properties;

D O I：

10.1016/j.materresbull.2007.10.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Synthesis and characterization of CuInS2 powder sample prepared by a simple and convenient solvothermal method is reported. The influence of the variation of Cu/In molar ratio from 0.69 to 1.25 on the particle morphology, crystal structure and optical properties of CuInS2 samples was studied. The X-ray diffraction studies indicated that the samples were polycrystalline in nature. SEM images of the samples revealed that the copper-rich products were uniform microspheres with smooth surfaces, whereas microspheres formed by network of interconnected flakes were obtained for indium-rich products. The optical band gaps (E-g) of the products decreased from 1.60 to 1.43 eV with variation of Cu/In molar ratio. The variation of the Urbach tail width with Cu/In molar ratio indicated that the density of the defects is much higher for the indium-rich CuInS2, which was clearly revealed from Raman measurements. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2742 / 2750

页数：9

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