Variation of optical and solid state properties with post deposition annealing in PVA-Capped MnO2 thin films
Título del documento: Variation of optical and solid state properties with post deposition annealing in PVA-Capped MnO2 thin films
Revista: Superficies y vacío
Base de datos: PERIÓDICA
Número de sistema: 000368094
ISSN: 1665-3521
Autores: 1
1
1
Instituciones: 1University of Nigeria, Department of Physics and Astronomy, Nsukka, Enugu. Nigeria
Año:
Periodo: Mar
Volumen: 23
Número: 1
Paginación: 18-21
País: México
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, aplicado
Resumen en inglés MnO2 thin films were synthesized on glass substrate by chemical bath deposition technique within the pores of polyvinyl alcohol (PVA) at room temperature. The chemical bath for the deposition of MnO2 is made up of solution of MnCl4, NH4Cl, NH3, and PVA solution. The deposited films were annealed in air at 473K and 673K and characterized for the structural, morphological and optical properties. These properties were studied by means of X–ray diffraction (XRD), optical microscopy and optical spectrophotometer for their potential application in solar energy devices. From the absorption spectra, the calculated direct and indirect band gap energies lie respectively in the range of 1.8 – 2.5 eV and 0.8 and 1.2 eV. The films show good transmittance in the near infrared region of the solar spectrum. Post deposition annealing affects both the optical and solid state properties of the films
Disciplinas: Ingeniería
Palabras clave: Ingeniería de materiales,
Ingeniería química,
Semiconductores,
Películas delgadas,
Oxido de manganeso,
Propiedades ópticas
Keyword: Engineering,
Chemical engineering,
Materials engineering,
Semiconductors,
Thin films,
Manganese oxide,
Optical properties
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