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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mccluskey, Matthew
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Topics
Publications (10/10 displayed)
- 2023Photoluminescence of Cr3+ in β-Ga2O3 and (Al0.1Ga0.9)2O3 under pressurecitations
- 2023Room-Temperature Persistent Photoconductivity in Barium Calcium Titanatecitations
- 2023Photoluminescence spectroscopy of Cr3+ in β-Ga2O3 and (Al0.1Ga0.9)2O3citations
- 2022Growth and defect characterization of doped and undoped β-Ga2O3 crystalscitations
- 2015Large Persistent Photoconductivity in Strontium Titanate at Room Temperaturecitations
- 2014Persistent Photoconductivity in Bulk Strontium Titanate
- 2009Dopants in nanoscale ZnO
- 2005Infrared Spectroscopy of Impurities in ZnO Nanoparticlescitations
- 2005Hydrogen Donors in ZnOcitations
- 2004Infrared Spectroscopy of Hydrogen in ZnOcitations
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document
Large Persistent Photoconductivity in Strontium Titanate at Room Temperature
Abstract
<jats:title>ABSTRACT</jats:title><jats:p>Strontium titanate (SrTiO<jats:sub>3</jats:sub>) is a wide-band-gap semiconductor with a variety of novel properties. In this work, bulk single crystal SrTiO<jats:sub>3</jats:sub> samples were heated to 1200°C, resulting in the creation of point defects. These thermally treated samples showed large persistent photoconductivity (PPC) at room temperature. Illumination with sub-gap light (>2.9 eV) caused an increase in free-electron concentration by over two orders of magnitude. After the light is turned off, the conductivity persists at room temperature, with essentially zero decay over several days. The results of electron paramagnetic resonance (EPR) measurements suggest that a point defect is responsible for PPC because the photo-induced response of one of the EPR signals is similar to that seen for the PPC. Due to a large barrier for recapture, the photo-excited electron remains in the conduction band, where it contributes to the conductivity.</jats:p>