Abstract
Orthorhombic tin sulfide (SnS) thin films have been deposited on stainless steel (SS) substrates by Chemical Bath Deposition (CBD) at 25, 35 and 70 °C with a deposit time of 8 hours each one. XRD analysis showed that samples obtained at 25 °C and 70 °C present very small diffraction peaks. This can be attributed in the case of the sample obtained at 25 degrees, that the crystallization process is not completed because the temperature is so low and in case of the sample deposited at 75 degrees, a redissolution of the material is carried out. However, sample obtained at 35 °C was polycrystalline with orthorhombic structure and preference plane (111). All samples showed the Raman vibrational modes TO and LO of the SnS and confirms that the samples do not have by-products. It was observed from SEM micrographs that the films consisted of spheres for the sample deposited at 25 °Candsmall flakes for the other samples. From diffuse reflectance measurements the optical band gap calculated was between 1.45 eV to 1.59 eV.
Highlights
Some years ago, tin sulfide (SnS) has been considered as potential material for photodetectors, heat mirrors, photocatalysis, photovoltaic devices because of their high optical absorption coefficient in the visible range (≈104cm1)
[16] For this reason, recently several researchers have been working on the replacement of glass by plastic or metal substrates, such is the case of stainless steel [16],[17]
The effect of temperature on the crystalline, morphological and optical properties of the SnS thin films deposited on stainless steel (SS) substrates by Chemical Bath Deposition (CBD) was analyzed
Summary
Tin sulfide (SnS) has been considered as potential material for photodetectors, heat mirrors, photocatalysis, photovoltaic devices because of their high optical absorption coefficient in the visible range (≈104cm). Some methods of preparation of SnS are: electrochemical deposition [7],[8], spray pyrolysis [9]–[11], Chemical Bath Deposition (CBD) [2],[12]–[15], etc. [16] For this reason, recently several researchers have been working on the replacement of glass by plastic or metal substrates, such is the case of stainless steel [16],[17]. The effect of temperature on the crystalline, morphological and optical properties of the SnS thin films deposited on SS substrates by CBD was analyzed
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