Molecular control over Ag/p-Si diode by organic layer |
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Authors: | ME Aydin |
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Institution: | a Faculty of Arts and Sciences, Department of Physics, University of Dicle, 21280, Turkey b Faculty of Arts and Sciences, Department of Physics, Firat University, Elazig 23119, Turkey |
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Abstract: | Electrical transport properties of Ag metal-fluorescein sodium salt (FSS) organic layer-silicon junction have been investigated. The current-voltage (I-V) characteristics of the diode show rectifying behavior consistent with a potential barrier formed at the interface. The diode indicates a non-ideal I-V behavior with an ideality factor higher than unity. The ideality factor of the Ag/FSS/p-Si diode decreases with increasing temperature and the barrier height increases with increasing temperature. The barrier height (φb=0.98 eV) obtained from the capacitance-voltage (C-V) curve is higher than barrier height (φb=0.72 eV) derived from the I-V measurements. The barrier height of the Ag/FSS/p-Si Schottky diode at the room temperature is significantly larger than that of the Ag/p-Si Schottky diode. It is evaluated that the FSS organic layer controls electrical charge transport properties of Ag/p-Si diode by excluding effects of the SiO2 residual oxides on the hybrid diode. |
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Keywords: | A Semiconductors A Organic compounds D Electrical properties |
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