Metal sulfide thin films by chemical spray pyrolysis

Malle Krunks; Enn Mellikov

doi:10.1117/12.425472

10 April 2001 Metal sulfide thin films by chemical spray pyrolysis

Malle Krunks, Enn Mellikov

Proceedings Volume 4415, Optical Organic and Inorganic Materials; (2001) https://doi.org/10.1117/12.425472
Event: Advanced Optical Materials and Devices, 2000, Vilnius, United States

Abstract

CdS, ZnS and CuS thin films were prepared by spray pyrolysis method using metal chlorides and thiourea (tu) as starting materials. Metal sulfide films form as products of thermal decomposition of complexes Cd(tu)₂Cl₂, Zn(tu)₂Cl₂ and Cu(tu)Cl(DOT)1/2H₂O, originally formed in aqueous solution at precursors molar ratio 1:2. The metal-ligand bonding is thermally stable up to 220 degrees Celsius, followed by multistep degradation process of complexes. The TG/DTA analysis show similar thermal behavior of complexes up to 300 degrees Celsius with the formation of metal sulfides in this decomposition step. In air intensive oxidation processes are detected close to 400, 600 and 720 degrees Celsius for Cu, Cd and Zn complexes, respectively. The results of thermoanalytical study and XRD of sprayed films show that CdS and ZnS films could be grown at 450 degrees Celsius even in air while deposition of copper sulfide films should be performed in an inert atmosphere. High total impurities content of 10 wt% in CdS films prepared at 240 degrees Celsius is originated from the precursor and reduced to 2 wt% by increasing the growth temperature up to 400 degrees Celsius.

Citation Download Citation

Malle Krunks and Enn Mellikov "Metal sulfide thin films by chemical spray pyrolysis", Proc. SPIE 4415, Optical Organic and Inorganic Materials, (10 April 2001); https://doi.org/10.1117/12.425472

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