Photochemical performance of ZnO nanostructures in dye sensitized solar cells |
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| Affiliation: | 1. Nano-Structured Materials Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, 700032, India;2. Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune, 411 008, India;3. CSIR-Network Institute of Solar Energy (CSIR-NISE), New Delhi, India;1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia;2. Djakov Institute of Electronics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria;3. Kaishev Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;4. Najakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria;1. Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113, United States;2. ICSM, UMR 5257 CEA/CNRS/UM2/ENSCM, Site de Marcoule – Bât. 426, BP 17171, 30207 Bagnols-sur-Cèze Cedex, France;3. Laboratoire de Cristallographie, Résonance Magnétique, et Modélisations CRM2 (UMR UHP-CNRS 7036), Faculté des Sciences et Techniques, Université de Lorraine, BP 70239, Boulevard des Aiguillettes, 54506 Vandoeuvre-lès-Nancy Cedex, France;1. Grupo de criação em experimentos de Ciências (G-CEC), 49031-240 Aracaju, SE, Brazil;2. Departamento de Química, Faculdade Pio Décimo, 49095-000 Aracaju, SE, Brazil;3. Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil;4. Departamento de Física, Universidade Federal de Sergipe, 49500-000 Itabaiana, SE, Brazil;1. Institut für Anorganische und Analytische Chemie and NRW Graduate School of Chemistry, Universität Münster, Corrensstraße 30, 48149 Münster, Germany;2. SNBL at ESRF, European Synchrotron Radiation Facility, 6 Rue Jules Horowitz BP 220, 38043 Grenoble, France;3. Institut für Anorganische Chemie, RWTH Aachen, Landoltweg 1, 52074 Aachen, Germany;1. Department of Physics, Bose Institute, 93/1 Acharya Prafulla Chandra Road, Kolkata 700009, India;2. Institute of Materials Research and Engineering (IMRE), Agency for Science Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore |
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| Abstract: | In this work, the photoconversion efficiencies of ZnO having diverse microstructures and structural defects have been investigated. A conversion efficiency of 1.38% was achieved for the DSSCs fabricated with as prepared ZnO nanorods having minimum vacancy defects and a favourable one dimensional directional pathway for electron conduction. The DSSCs fabricated with ZnO nanoparticles exhibited relatively low conversion efficiency of 1.004% probably due to multiple trapping/detrapping phenomena within the grain boundaries and ZnO flowers though exhibited a high dye adsorption capability exhibited the lowest conversion efficiency of 0.59% due to a high concentration of structural defects. Based on the experimental evidences, we believe that the type of defects and their concentrations are more important than shape in controlling the overall performance of ZnO based DSSCs. |
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| Keywords: | ZnO Structural defects DSSC Efficiency Emission |
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