XPS studies and photocurrent applications of alkali-metals-doped ZnO nanoparticles under visible illumination conditions |
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| Institution: | 1. Young Researchers and Elite Club, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran;2. Department of Physics, Masjed-Soleiman Branch, Islamic Azad University (I.A.U), Masjed-Soleiman, Iran;3. Department of Physics, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran;4. Nanotechnology Laboratory, Esfarayen University, North Khorasan, Iran;5. Department of Chemistry, Shahid Sherafat, University of Farhangian, 15916 Tehran, Iran;6. Department of Metallurgy and Materials Engineering, Masjed-Soleiman Branch, Islamic Azad University (I.A.U), Masjed-Soleiman, Iran;7. Department of Chemistry, Masjed-Soleiman Branch, Islamic Azad University (I.A.U), Masjed-Soleiman, Iran;1. Centro de Investigación y Desarrollo en Ciencias Aplicadas “Dr. Jorge J. Ronco” (CINDECA, CONICET-FCE UNLP), 47 Nro 257, La Plata, Buenos Aires, Argentina;2. PlantaPilotoMultipropósito, (PlaPiMu, CICPBA-UNLP), Av. Cno. Centenario y 506, M. B. Gonnet, Buenos Aires, Argentina;3. Instituto de Física La Plata – (IFLP, CONICET – FCE UNLP), Calle 49 y 115, La Plata, Buenos Aires, Argentina;1. Department of Physics and Photon Sciences, Gwangju Institute of Science and Technology, Gwangju, 500-712, South Korea;2. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, People''s Republic of China;3. School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, People''s Republic of China;4. Department of Chemistry, Kyungpook National University, Daegu, 41566, South Korea;1. Department of Physics, Gebze Technical University, 41400, Kocaeli, Turkey;2. Institute of Nanotechnology, Gebze Technical University, 41400, Kocaeli, Turkey |
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| Abstract: | The present work is a study about a relationship between X-ray photoelectron spectrometer (XPS) results and photocurrent intensity of alkali-metals-elements doped ZnO nanoparticles, which is carried out under visible illumination conditions. The nanoparticles were synthesized by a simple sol–gel method. Structure and morphology studies of the NPs were carried out by X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The effect of doping on the optical band-gap was investigated by using UV–visible spectrometer. The absorption peak of the doped ZnO NPs was red-shifted with respect to that of the undoped ZnO NPs. After that, the photocurrent application of the products was examined under a white light source at 2 V bias. The photocurrent results showed that, the current intensity of the ZnO NPs was increased by doping materials. However, K-doped ZnO NPs showed the highest photocurrent intensity. Finally, a discussion was carried out about the obtained photocurrent results by the O-1s spectra of the XPS of the samples. Our results suggest that the alkali-metals-doped ZnO NPs exhibit considerable promise for highly sensitive visible-light photodetectors. |
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| Keywords: | ZnO nanoparticles Alkali-metals-doped ZnO Photocurrent application XPS spectrometer |
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