Effect of substrate temperature on structural,morphological, optical and electrical properties of MnIn2S4 thin films prepared by nebulizer spray pyrolysis technique |
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| Affiliation: | 1. Department of Physics, CSI College of Engineering, Ooty 643215, Tamil Nadu, India;2. Department of Physics & Electronics, Karpagam University, Coimbatore, Tamil Nadu, India;1. Plasma Physics Research Centre, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Thin Film Laboratory and Nano-Electronics, Department of Electrical and Computer Engineering, University of Tehran, Tehran, Iran;3. Physics Department, Faculty of Science, Payame Noor University, Po Box 19395-3697, Tehran, Iran;1. Laboratoire de Physique de la matière condensée et des nanosciences, Faculté des Sciences de Monastir, 5019, University of Monastir, Tunisia;2. Institut Néel, CNRS et Université Joseph Fourrier, B.P. 166, B.P.W-38042, Grenoble Cedex 9, France;1. Institute of Materials Science, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Hanoi, Vietnam;2. Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea;3. Department of Chemistry, Chungbuk National University, Cheongju 361-763, South Korea;4. Quang Ninh University of Industry, Quang Ninh, Vietnam;5. Department of Physics and Oxide Research Center, Hankuk University of Foreign Studies, Yongin 449-791, South Korea;1. Laboratory of Condensed Matter and Nanosciences, University of Monastir, 5019, Tunisia;2. Institut Néel, CNRS and Joseph Fourier university, B.P. 166, 38042 Grenoble, France;3. Institut Néel, CNRS et Université Joseph Fourier, BP 166, F-38042, Grenoble cedex 9, France;1. Laboratoire des Matériaux Ferroélectriques (LMF), Unité de Physique Mathématiques, 05UR15-04, Université de Sfax, Faculté des Sciences de Sfax (FSS), Route de Soukra km 3.5, B.P. 1171, 3000 Sfax, Tunisia;2. Laboratoire de Physique de la Matière Condensée (LPMC), Université de Picardie, Jules Verne, Pôle Scientifique, 33 rue Saint-Leu, 80039 Amiens Cedex 1, France;3. Laboratoire de Chimie Inorganique, Université de Sfax, Faculté des Sciences de Sfax, BP 1171, Tunisia |
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| Abstract: | Manganese indium sulphide (MnIn2S4) thin films were deposited using an aqueous solution of MnCl2, InCl3 and (NH2)2CS in the molar ratio 1:2:4 by simple chemical spray pyrolysis technique. The thin film substrates were annealed in the temperature range between 250 and 350 °C to study their various physical properties. The structural properties as studied by X-ray diffraction showed that MnIn2S4 thin films have cubic spinel structure. The formation of cube and needle shaped grains was clearly observed from FE-SEM analysis. The energy dispersive spectrum (EDS) predicts the presence of Mn, In and S in the synthesized thin film. From the optical studies, it is analyzed that the maximum absorption co-efficient is in the order between 104 and 105 cm−1 and the maximum transmittance (75%) was noted in the visible and infrared regions. It is noted that, the band gap energy decreases (from 3.20 to 2.77 eV) with an increase of substrate temperature (from 250 to 350 °C). The observations from photoluminescence studies confirm the emission of blue, green, yellow and red bands which corresponds to the wavelength range 370–680 nm. Moreover, from the electrical studies, it is observed that, as the substrate temperature increases the conductivity also increases in the range 0.29–0.41×10−4 Ω−1 m−1. This confirms the highly semiconducting nature of the film. The thickness of the films was also measured and the values ranged between 537 nm (250 °C) to 483 nm (350 °C). This indicates that, as the substrate temperature increases, the thickness of the film decreases. From the present study, it is reported that the MnIn2S4 thin films are polycrystalline in nature and can be used as a suitable ternary semiconductor material for photovoltaic applications. |
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| Keywords: | Spray pyrolysis Structural properties Optical properties Electrical properties |
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