Low-temperature spray-pyrolysis of FeS2 films and their electrical and optical properties |
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| Authors: | I G Orletskii P D Mar’yanchuk E V Maistruk M N Solovan V V Brus |
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| Institution: | 1. Fedkovych National University of Chernivtsi, ul. Kotsubinskaya 2, Chernivtsi, 58012, Ukraine
2. University of California, Santa Barbara, California, 93106, USA
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| Abstract: | Iron disulfide (FeS2) films with a wide range of electrical resistivities 100 Ω cm ? ρ ? 800 kΩ cm, a high adhesion to the substrate, and a resistance to aggressive media have been prepared by the spray pyrolysis of aqueous solutions of the salts FeCl3 · 6H2O and (NH2)2CS at low temperatures in the range 250°C ? T S ? 400°C. It has been found that the FeS2 films have a high transmittance T ≈ 60–70% and are characterized by a sharp transmission edge. It has been shown that the optical band gap for direct (E g op = 2.19–2.78 eV) and indirect (E g ′op = 1.26–1.36 eV) optical transitions depends on the conditions of film preparation. |
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