Solvothermal synthesis of g-C3N4 and ZnO nanoparticles on TiO2 nanotube as photoanode in DSSC |
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| Affiliation: | 1. Department of Chemistry, Behbahan Khatam Alanbia University of Technology, Behbahan, 63616-11111, Iran;2. Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, Zahedan, 98135-674, Iran;1. Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, PR China;2. College of Materials Science and Engineering, Northeastern University, Shenyang 110819, PR China;3. Novo Nordisk (China) Pharmaceuticals Co., Ltd. (TEDA Plant), TianJin 300000, PR China;4. School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, PR China;5. Department of Engineering, School of Physics, Engineering and Computer Science, University of Hertfordshire, Hatfield AL109AB, UK;1. Materials Chemistry Department, CSIR- Institute of Minerals and Materials Technology, Bhubaneswar, 751013, Odisha, India;2. Departments of Chemistry, University of North Texas, Denton, TX, 76203, USA;3. School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Jatni, Khorda, 752050, Odisha, India;4. Departments of Physics, University of North Texas, Denton, TX, 76203, USA |
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| Abstract: | In this research, the dye-sensitized solar cells (DSSCs) were fabricated by using g-C3N4 and ZnO modified TiO2nanotube (TNT) arrays as photoanodes. The TNT arrays were synthesized by the anodizing method. G-C3N4 and ZnO modified TNTs were synthesized via a solvothermal method in which ethylene glycol served as a solvent. The short circuit current (ISC) and open-circuit voltage (VOC) of DSSCs based on ZnO + g-C3N4modified TNTs photoanode considerably increased from 9.25 mA/cm−2to 14.68 mA/cm−2, and from 0.707 mV to 0.695 mV, respectively, resulting in a135% increase in the efficiency compared with the pure TNT arrays photoanode. However, the DSSC fabricated with g-C3N4 TNT did not show much improvement in the conversion efficiency compared with the pure TNT arrays photoanode, implying more effective processes of the carrier production and transport between ZnO, g-C3N4 and TNTs. Also, the electrochemical impedance spectroscopy (EIS) and open-circuit voltage decay (OCVD) analyses showed that ZnO + g-C3N4 can promote the electron collecting rate, suppress he electron recombination and extend the electron lifetime. |
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| Keywords: | Dye-sensitized solar cell Solvothermal synthesis |
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