Experimental investigation on the structural,dielectric, ferroelectric and piezoelectric properties of La doped ZnO nanoparticles and their application in dye-sensitized solar cells |
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| Institution: | 1. Crystal Lab, Department of Physics & Astrophysics, University of Delhi, Delhi 110007, India;2. Department of Physics & Electronics, SGTB Khalsa College, University of Delhi, Delhi 110007, India;1. Crystal Lab, Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India;2. Department of Electronics, SGTB Khalsa College, University of Delhi, Delhi 110007, India;1. Crystal Lab, Department of Physics & Astrophysics, University of Delhi, Delhi, 110007, India;2. Department of Electronics, SGTB Khalsa College, University of Delhi, Delhi, 110007, India;1. Department of Physics, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt;2. Department of Materials Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea;3. Lyman Laboratory of Physics, Harvard University, Cambridge, MA 02138, USA;4. Physics Dept., Faculty of Science, Fayoum University, Fayoum, Egypt;5. National University of Science and Technology “MISiS”, Moscow, 119049, Russia;6. Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni-Suef, 62511, Egypt;1. Crystal Lab, Department of Physics & Astrophysics, University of Delhi, Delhi, 110007, India;2. Department of Electronics, SGTB Khalsa College, University of Delhi, Delhi, 110007, India;3. Department of Physics, Netaji Subhas University of Technology, New Delhi, 110078, India;1. Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, India;2. School of Materials Science and Engineering, UNSW, Sydney, NSW, 2052, Australia;3. ARC Centre of Excellence in Future Low-Energy Electronics Technologies, UNSW, Sydney, NSW, 2052, Australia |
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| Abstract: | Pure and lanthanum (La) doped ZnO nanorods were synthesized via co-precipitation method. The structure and morphology of as grown ZnO and La-ZnO nanoparticles were studied using transmission electron microscopy (TEM) and powder X-ray diffraction (XRD) methods. The values of remnant polarization and coercive field were found to be 0.027 μC/cm2 and 1.33 kV/cm, respectively, for as grown La-ZnO nanostructures. High Curie temperature (276 °C) for doped ZnO was observed in dielectric study. Piezoelectric coefficient at room temperature was found to be 101.30 pm/V. I-V characteristics were studied for both pure and doped ZnO nanoparticles. Photo-anodes of dye-sensitized solar cells (DSSCs) were made using ZnO and La-ZnO nanorods. The conversion efficiency and short circuit current density of La-ZnO nanorods based DSSC were 0.36% and 1.31 mA/cm2, respectively, which were found to be largely enhanced when compared with that of pure ZnO based DSSC (0.20% and 0.94 mA/cm2). |
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| Keywords: | Nanorods ZnO Piezoelectricity Transmission electron microscopy Ferrolectricity Dye-sensitized solar cells |
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