Physical Properties of Macroporous Tungsten Oxide Thin Films and Their Impact on the Photocurrent Density
Tungsten trioxide (WO3) films were prepared using polystyrene spheres of two different diameters as a template in order to create porous layers. X-ray diffraction data and electron microscopy images show that annealed films exhibit polycrystalline structure with monoclinic phase and pore size of app...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2013/765297 |
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| author | I. Riech M. Acosta M. A. Zambrano-Arjona F. Peñuñuri M. Rosado-Mendoza E. Marín P. Rodríguez-Fragoso J. G. Mendoza-Álvarez |
| author_facet | I. Riech M. Acosta M. A. Zambrano-Arjona F. Peñuñuri M. Rosado-Mendoza E. Marín P. Rodríguez-Fragoso J. G. Mendoza-Álvarez |
| author_sort | I. Riech |
| collection | DOAJ |
| description | Tungsten trioxide (WO3) films were prepared using polystyrene spheres of two different diameters as a template in order to create porous layers. X-ray diffraction data and electron microscopy images show that annealed films exhibit polycrystalline structure with monoclinic phase and pore size of approximately hundred nanometers. The optical band gap energies have been determined by photoacoustic spectroscopy as 3.17 eV, and this value was not affected by sample morphology. Low temperature photoluminescence spectra exhibit broad band in the blue region. Deconvolutions of PL spectra show that there are two transitions which intensity depends on thin film pore size. We discuss the possible origin of this emissions associated with oxygen vacancies and surface states. A comparative study of the WO3 films used as photoanodes is presented and correlated with PL results. |
| format | Article |
| id | doaj-art-ba2fb8cc52af49b3af4bc257404e2d73 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-ba2fb8cc52af49b3af4bc257404e2d732025-02-03T06:42:15ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2013-01-01201310.1155/2013/765297765297Physical Properties of Macroporous Tungsten Oxide Thin Films and Their Impact on the Photocurrent DensityI. Riech0M. Acosta1M. A. Zambrano-Arjona2F. Peñuñuri3M. Rosado-Mendoza4E. Marín5P. Rodríguez-Fragoso6J. G. Mendoza-Álvarez7Laboratorio de Ciencia de Materiales, Facultad de Ingeniería, Universidad Autónoma de Yucatán, 97130 Mérida, YUC, MexicoLaboratorio de Ciencia de Materiales, Facultad de Ingeniería, Universidad Autónoma de Yucatán, 97130 Mérida, YUC, MexicoLaboratorio de Ciencia de Materiales, Facultad de Ingeniería, Universidad Autónoma de Yucatán, 97130 Mérida, YUC, MexicoLaboratorio de Ciencia de Materiales, Facultad de Ingeniería, Universidad Autónoma de Yucatán, 97130 Mérida, YUC, MexicoLaboratorio de Ciencia de Materiales, Facultad de Ingeniería, Universidad Autónoma de Yucatán, 97130 Mérida, YUC, MexicoInstituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Unidad Legaría, Legaria 694, Colonia Irrigación, 11500 México, DF, MexicoDepartamento de Física, CINVESTAV-IPN, A.P. 14-740, 07000 México, DF, MexicoDepartamento de Física, CINVESTAV-IPN, A.P. 14-740, 07000 México, DF, MexicoTungsten trioxide (WO3) films were prepared using polystyrene spheres of two different diameters as a template in order to create porous layers. X-ray diffraction data and electron microscopy images show that annealed films exhibit polycrystalline structure with monoclinic phase and pore size of approximately hundred nanometers. The optical band gap energies have been determined by photoacoustic spectroscopy as 3.17 eV, and this value was not affected by sample morphology. Low temperature photoluminescence spectra exhibit broad band in the blue region. Deconvolutions of PL spectra show that there are two transitions which intensity depends on thin film pore size. We discuss the possible origin of this emissions associated with oxygen vacancies and surface states. A comparative study of the WO3 films used as photoanodes is presented and correlated with PL results.http://dx.doi.org/10.1155/2013/765297 |
| spellingShingle | I. Riech M. Acosta M. A. Zambrano-Arjona F. Peñuñuri M. Rosado-Mendoza E. Marín P. Rodríguez-Fragoso J. G. Mendoza-Álvarez Physical Properties of Macroporous Tungsten Oxide Thin Films and Their Impact on the Photocurrent Density International Journal of Photoenergy |
| title | Physical Properties of Macroporous Tungsten Oxide Thin Films and Their Impact on the Photocurrent Density |
| title_full | Physical Properties of Macroporous Tungsten Oxide Thin Films and Their Impact on the Photocurrent Density |
| title_fullStr | Physical Properties of Macroporous Tungsten Oxide Thin Films and Their Impact on the Photocurrent Density |
| title_full_unstemmed | Physical Properties of Macroporous Tungsten Oxide Thin Films and Their Impact on the Photocurrent Density |
| title_short | Physical Properties of Macroporous Tungsten Oxide Thin Films and Their Impact on the Photocurrent Density |
| title_sort | physical properties of macroporous tungsten oxide thin films and their impact on the photocurrent density |
| url | http://dx.doi.org/10.1155/2013/765297 |
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