Synthesis of AgInSnS4 thin films by adding tin (Sn) into the chalcopyrite structure of AgInS2 using spray pyrolysis
| Autor: | J.J. Cayente-Romero, M.L. Albor-Aguilera, V.M. Sánchez-Reséndiz, E. Barrera-Calva, M. Ortega-López, Yasuhiro Matsumoto |
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| Rok vydání: | 2010 |
| Předmět: |
Chalcopyrite
Inorganic chemistry Metals and Alloys Analytical chemistry chemistry.chemical_element Surfaces and Interfaces Crystal structure Quaternary compound Conductivity Surfaces Coatings and Films Electronic Optical and Magnetic Materials Silver chloride chemistry.chemical_compound Lattice constant chemistry visual_art Materials Chemistry visual_art.visual_art_medium Thin film Tin |
| Zdroj: | Thin Solid Films. 518:1821-1824 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2009.09.040 |
| Popis: | AgInSnS 4 thin films were prepared by adding a tin salt to the starting solution used for preparing chalcopyrite AgInS 2 thin films by spray pyrolysis The AgInSnS 4 films were grown at substrate temperatures in the 300–400 °C range, using an alcoholic solution comprised of silver acetate, indium chloride, tin chloride and thiourea. The tin chloride content in the starting solution was gradually varied in terms of the molar ratio x = [Sn]/([S] + [Ag]) from 0 to 0.5 to obtain Sn-doped chalcopyrite AgInS 2 ( x 4 ( x = 0.2–0.4). X-ray diffraction studies indicated that AgInSnS 4 has a cubic spinel-like structure with lattice parameter of 10.77 A. All AgInSnS 4 thin films exhibited p-type conduction, and their room temperature conductivity ranged from 10 − 1 to 10 − 2 S/cm. The conductivity versus 1/T plots for this material showed an Arrhenius-like behavior, from which two activation energies of E a1 = 0.23–0.40 eV and E a2 = 0.07–0.20 eV were determined. These results suggest that the grain boundary scattering and the ionization of shallow acceptors dominate the charge carrier transport in the sprayed AgInSnS 4 thin films. The AgInSnS 4 absorption spectrum revealed an energy gap around E g = 1.89 eV, which was associated to direct-allowed transitions. To our knowledge, the quaternary compound has been prepared for the first time using spray pyrolysis. |
| Databáze: | OpenAIRE |
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