Optical and photoelectric properties of SnS thin films prepared by chemical bath deposition

Abstract

Thin films of SnS have been prepared by chemical bath deposition and thermally treated in argon atmosphere at different temperatures. As-prepared films were polycrystalline of an orthorhombic structure, but at the thermal treatment of 300 • C their preferential orientation increased. The optical bandgap and the type of transition are determined by the transmittance spectrum. The value of the optical bandgap is determined for the direct transitions of 1.38 eV which is not changed by the thermal treatment. The optical bandgap for the indirect transitions increased with the time of thermal treatment, and also the energy of phonon is estimated. From the red edge of the photoconductivity spectrum, a bandgap of E g(ph) = 1.24 eV was also determined. An impurity level with an activation energy of 0.39 eV and a thermal bandgap of E g(T ) = 1.19 eV are determined by the temperature dependence of the dark resistance of the films.

Hydrothermal Synthesis, Characterization and Raman Vibrations of Chalcogenide SnS Nanorods

“…Also the orthorhombic herzenbergite modification of SnS possesses a layered structure consisting where the Sn and S atoms are tightly bonded in a layer and layers are bonded by weak Van der Waals forces [6] Importantly, SnS exhibits both the p-and ntype conduction depending on the concentration of tin [7]. The narrowband gap and the interesting structural property of SnS make it a potential candidate for solar absorber in thin film solar cell and near-infrared (NIR) detector [8,9], as photovoltaic materials [10] and in holographic recording medium [11]. Moreover, it has the advantage of its constituent elements being abundant in nature and not posing any health and environmental hazards.…”

Synthesis of SnS nanocrystals by the solvothermal decomposition of a single source precursor

“…Semiconductor SnS has an optical band gap value of 1.1 eV [3], a large optical absorption coefficient of >10 4 cm -1 [4][5][6] and a high photoelectric conversion efficiency (up to 25%) [7,8].…”

“…Conventional SnS synthetic techniques have been applied most often for the fabrication of bulk SnS films [4][5][6][8][9][10][11][12][13][14]. There have been a number of reports of syntheses of nanocrystalline SnS.…”

The Optical Study of ZnO Thin Films at Different Times of Annealing and Varying Temperatures Prepared by Chemical Bath Deposition.

“…The films in this study are grown by chemical bath deposition (CBD) which creates a thin film on a solid substrate via a reaction in a liquid solution. The CBD method is inexpensive, easy to prepare and its necessary vessels can be found in an ordinary chemistry laboratory [13]. In this work, we report the study of the optical properties of ZnO thin films at varying annealing times and temperatures prepared by chemical bath deposition on glass substrates.…”