The Negative Photoconductivity of Ag/AgO Grown by Spray-Pyrolysis
The main goal of this work is to provide a general description of the negative photoconductivity effect observed in Ag/AgO films grown by the spray-pyrolysis technique. X-ray diffractograms display hybrid films with high texturized AgO and metallic Ag phases. Scanning electron microscopy images show...
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| Format: | Article |
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MDPI AG
2022-03-01
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| Series: | Surfaces |
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| Online Access: | https://www.mdpi.com/2571-9637/5/1/14 |
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| author | Aline Bastos de Paiva Luis Miguel Bolaños Vargas Matheus José da Silva Ariano De Giovanni Rodrigues Demétrio A. W. Soares Marcelos Lima Peres Marcio Peron Franco de Godoy |
| author_facet | Aline Bastos de Paiva Luis Miguel Bolaños Vargas Matheus José da Silva Ariano De Giovanni Rodrigues Demétrio A. W. Soares Marcelos Lima Peres Marcio Peron Franco de Godoy |
| author_sort | Aline Bastos de Paiva |
| collection | DOAJ |
| description | The main goal of this work is to provide a general description of the negative photoconductivity effect observed in Ag/AgO films grown by the spray-pyrolysis technique. X-ray diffractograms display hybrid films with high texturized AgO and metallic Ag phases. Scanning electron microscopy images show small Ag particles on the surface. Due to its surface nature, X-ray photoelectron spectroscopy revealed the predominance of the metallic character of Ag 3d spectra as compared to Ag<sup>2+</sup>. Negative photoconductivity with photoresponse in the order of seconds is observed under several wavelengths of excitation. We found that the amplitude of the negative photoresponse is strongly dependent on the optical absorbance and enhanced by surface plasmon resonance. The low-cost technique employed and the special features regarding negative photoconductivity provide an exciting platform for developing optical-electronic devices with low power consumption. |
| first_indexed | 2024-03-09T12:35:31Z |
| format | Article |
| id | doaj.art-02fb78b81a374b24b5a24c92e19aafb5 |
| institution | Directory Open Access Journal |
| issn | 2571-9637 |
| language | English |
| last_indexed | 2024-03-09T12:35:31Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Surfaces |
| spelling | doaj.art-02fb78b81a374b24b5a24c92e19aafb52023-11-30T22:24:47ZengMDPI AGSurfaces2571-96372022-03-015120921710.3390/surfaces5010014The Negative Photoconductivity of Ag/AgO Grown by Spray-PyrolysisAline Bastos de Paiva0Luis Miguel Bolaños Vargas1Matheus José da Silva2Ariano De Giovanni Rodrigues3Demétrio A. W. Soares4Marcelos Lima Peres5Marcio Peron Franco de Godoy6Departamento de Física, Universidade Federal de São Carlos, São Carlos 13565-905, SP, BrazilInstituto de Física e Química, Universidade Federal de Itajuba, Itajubá 37500-903, MG, BrazilInstituto de Física e Química, Universidade Federal de Itajuba, Itajubá 37500-903, MG, BrazilDepartamento de Física, Universidade Federal de São Carlos, São Carlos 13565-905, SP, BrazilInstituto de Física e Química, Universidade Federal de Itajuba, Itajubá 37500-903, MG, BrazilInstituto de Física e Química, Universidade Federal de Itajuba, Itajubá 37500-903, MG, BrazilDepartamento de Física, Universidade Federal de São Carlos, São Carlos 13565-905, SP, BrazilThe main goal of this work is to provide a general description of the negative photoconductivity effect observed in Ag/AgO films grown by the spray-pyrolysis technique. X-ray diffractograms display hybrid films with high texturized AgO and metallic Ag phases. Scanning electron microscopy images show small Ag particles on the surface. Due to its surface nature, X-ray photoelectron spectroscopy revealed the predominance of the metallic character of Ag 3d spectra as compared to Ag<sup>2+</sup>. Negative photoconductivity with photoresponse in the order of seconds is observed under several wavelengths of excitation. We found that the amplitude of the negative photoresponse is strongly dependent on the optical absorbance and enhanced by surface plasmon resonance. The low-cost technique employed and the special features regarding negative photoconductivity provide an exciting platform for developing optical-electronic devices with low power consumption.https://www.mdpi.com/2571-9637/5/1/14oxidesphotoconductivitysilversurface plasmon resonance |
| spellingShingle | Aline Bastos de Paiva Luis Miguel Bolaños Vargas Matheus José da Silva Ariano De Giovanni Rodrigues Demétrio A. W. Soares Marcelos Lima Peres Marcio Peron Franco de Godoy The Negative Photoconductivity of Ag/AgO Grown by Spray-Pyrolysis Surfaces oxides photoconductivity silver surface plasmon resonance |
| title | The Negative Photoconductivity of Ag/AgO Grown by Spray-Pyrolysis |
| title_full | The Negative Photoconductivity of Ag/AgO Grown by Spray-Pyrolysis |
| title_fullStr | The Negative Photoconductivity of Ag/AgO Grown by Spray-Pyrolysis |
| title_full_unstemmed | The Negative Photoconductivity of Ag/AgO Grown by Spray-Pyrolysis |
| title_short | The Negative Photoconductivity of Ag/AgO Grown by Spray-Pyrolysis |
| title_sort | negative photoconductivity of ag ago grown by spray pyrolysis |
| topic | oxides photoconductivity silver surface plasmon resonance |
| url | https://www.mdpi.com/2571-9637/5/1/14 |
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