Structural and Optical Study of Ga3+ Substitution in CuInS2 Nanoparticles Synthesized by a One-Pot Facile Method

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• 作者：Yaser Vahidshad ; Muhammad Nawaz Tahir ; Azam Iraji Zad ; Seyed Mohammad Mirkazemi ; Reza Ghasemzadeh ; Hannah Huesmann ; Wolfgang Tremel
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：October 23, 2014
• 年：2014
• 卷：118
• 期：42
• 页码：24670-24679
• 全文大小：855K
• ISSN：1932-7455

文摘

A one-pot method was used to synthesize CuIn_xGa_1鈥?i>xS₂ nanoparticles by substituting In³⁺ with Ga³⁺. The samples with composition of gallium ranging from 0% to 100% were synthesized by solving copper chloride, indium trichloride, gallium acetylacetonate, and thiourea as precursors in 1-octadecene, oleylamine, and oleic acid as noncoordinating, coordinating, and capping agent solvents, respectively. Depending on the chemical composition and synthesis conditions, the morphology of the as-synthesized nanoparticles obtained was trigonal, semitrigonal, hexagonal, and quasi-spherical. X-ray photoelectron spectroscopy and X-ray diffraction confirmed that Ga³⁺ substituted In³⁺ without any segregation over a wide range. The as-synthesized CuIn_xGa_1鈥?i>xS₂ nanoparticles showed narrow size distribution across the entire composition range (x = 0鈥?) and band gap tuned in the range from 1.44 to 2.28 eV. The morphology, structure, and optical properties of the synthesized nanoparticles were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), UV鈥搗isible (UV鈥搗is) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The mechanism of complex formation up to nanoparticle synthesis was also discussed.