One-step diffusion membrane assisted CBD synthesis and characterization of Cu2SnS3 thin films

21st Latin American Symposium on Solid State Physics

Becerra, R.A.^1 ; Correa, J.M.^1 ; Suarez, H.^1 ; Gordillo, G.^2

Departamento de Química, Universidad Nacional de Colombia, sede Bogotá, Colombia^1

Departamento de Física, Universidad Nacional de Colombia, Sede Bogotá, Carrera 45 No. 26-85, Edificio Uriel Gutiérrez, Bogotá, Colombia^2

关键词: Chemical equilibriums;    Chemical routes;    Diffusion membranes;    Equilibrium equation;    Raman measurements;    Simultaneous precipitation;    Spectral transmittance;    Synthesis and characterizations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/480/1/012008/pdf
DOI  :  10.1088/1742-6596/480/1/012008

来源: IOP

【 摘 要 】

This paper present a novel method for growing thin films of Cu2SnS3(CTS) using a solution-based chemical route consisting of simultaneous precipitation of Cu2-xS and SnS2performed by diffusion membranes assisted CBD technique. Diffusion membranes are used to optimize the kinetic growth through a moderate control of the releasing metal into the solution. The conditions in terms of concentration of metal species, sulfide anion and temperature required for the precipitation of the Cu2SnS3compound were determined through a study of chemical equilibrium of the system SnCl2, Na3C6H5O7·2H2O, CuCl2and Na2S2O3·5H2O. These conditions were obtained solving the equilibrium equations with the help of the Visual MINTEQ 3.0 package, supported on the program MINTEQA2. X-ray diffraction (XRD) and Raman spectroscopy were used to characterize the structural properties of the CTS films. Optical, morphological and electrical properties were also studied by spectral transmittance, atomic force microscopy (AFM) and resistivity vs temperature measurements. XRD and Raman measurements confirmed the formation of the Cu2SnS3phase.