Morphological Effect of CNT/TiO2 Nanocomposite Photoelectrodes Dye-Sensitized Solar Cell on Photovoltaic Performance with Various Annealing Temperatures
This research focused on the fabrication of dye-sensitized solar cell based on a photoanode of carbon nanotube/titanium dioxide (CNT/TiO2) nanocomposite photoanode synthesized through acid-catalyzed sol-gel method. The results show the improvement of the chemical and electrical properties of the sol...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2015/501978 |
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| _version_ | 1832555973972066304 |
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| author | Mohd Zikri Razali Huda Abdullah Izamarlina Asaahari |
| author_facet | Mohd Zikri Razali Huda Abdullah Izamarlina Asaahari |
| author_sort | Mohd Zikri Razali |
| collection | DOAJ |
| description | This research focused on the fabrication of dye-sensitized solar cell based on a photoanode of carbon nanotube/titanium dioxide (CNT/TiO2) nanocomposite photoanode synthesized through acid-catalyzed sol-gel method. The results show the improvement of the chemical and electrical properties of the solar cells annealed at different temperatures. The CNT/TiO2 colloidal solution was synthesized using titanium tetraisopropoxide and CNT/2-propanol solution. The thin films were doctor-bladed on a fluorine tin oxide glass before being annealed at 550, 650, and 750°C. The field emission scanning electron microscopy morphological images show that the thin films were homogenously distributed and maintained their spherical structures. The X-ray diffraction patterns show that the films consisted of anatase and rutile phases with large crystallite sizes due to temperature increment. The atomic force microscopy analysis presents the thin film roughness in terms of root mean square roughness. The photovoltaic performance was analyzed using IV curve and electrochemical impedance spectroscopy (EIS). The thin films annealed at 750°C had the highest energy conversion efficiency at 5.23%. The EIS analysis estimated the values of the effective electron lifetime (τeff), effective electron diffusion coefficient, effective electron diffusion (Ln), and effective recombination rate constant (keff). A large τeff, small keff, and longer Ln can improve photovoltaic performance efficiency. |
| format | Article |
| id | doaj-art-1f3fa0eb3b70453e8c5caaa41e86355f |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-1f3fa0eb3b70453e8c5caaa41e86355f2025-02-03T05:46:39ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2015-01-01201510.1155/2015/501978501978Morphological Effect of CNT/TiO2 Nanocomposite Photoelectrodes Dye-Sensitized Solar Cell on Photovoltaic Performance with Various Annealing TemperaturesMohd Zikri Razali0Huda Abdullah1Izamarlina Asaahari2Department of Electrical, Electronic & System Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, MalaysiaDepartment of Electrical, Electronic & System Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, MalaysiaFundamental Studies of Engineering Unit (UPAK), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, MalaysiaThis research focused on the fabrication of dye-sensitized solar cell based on a photoanode of carbon nanotube/titanium dioxide (CNT/TiO2) nanocomposite photoanode synthesized through acid-catalyzed sol-gel method. The results show the improvement of the chemical and electrical properties of the solar cells annealed at different temperatures. The CNT/TiO2 colloidal solution was synthesized using titanium tetraisopropoxide and CNT/2-propanol solution. The thin films were doctor-bladed on a fluorine tin oxide glass before being annealed at 550, 650, and 750°C. The field emission scanning electron microscopy morphological images show that the thin films were homogenously distributed and maintained their spherical structures. The X-ray diffraction patterns show that the films consisted of anatase and rutile phases with large crystallite sizes due to temperature increment. The atomic force microscopy analysis presents the thin film roughness in terms of root mean square roughness. The photovoltaic performance was analyzed using IV curve and electrochemical impedance spectroscopy (EIS). The thin films annealed at 750°C had the highest energy conversion efficiency at 5.23%. The EIS analysis estimated the values of the effective electron lifetime (τeff), effective electron diffusion coefficient, effective electron diffusion (Ln), and effective recombination rate constant (keff). A large τeff, small keff, and longer Ln can improve photovoltaic performance efficiency.http://dx.doi.org/10.1155/2015/501978 |
| spellingShingle | Mohd Zikri Razali Huda Abdullah Izamarlina Asaahari Morphological Effect of CNT/TiO2 Nanocomposite Photoelectrodes Dye-Sensitized Solar Cell on Photovoltaic Performance with Various Annealing Temperatures International Journal of Photoenergy |
| title | Morphological Effect of CNT/TiO2 Nanocomposite Photoelectrodes Dye-Sensitized Solar Cell on Photovoltaic Performance with Various Annealing Temperatures |
| title_full | Morphological Effect of CNT/TiO2 Nanocomposite Photoelectrodes Dye-Sensitized Solar Cell on Photovoltaic Performance with Various Annealing Temperatures |
| title_fullStr | Morphological Effect of CNT/TiO2 Nanocomposite Photoelectrodes Dye-Sensitized Solar Cell on Photovoltaic Performance with Various Annealing Temperatures |
| title_full_unstemmed | Morphological Effect of CNT/TiO2 Nanocomposite Photoelectrodes Dye-Sensitized Solar Cell on Photovoltaic Performance with Various Annealing Temperatures |
| title_short | Morphological Effect of CNT/TiO2 Nanocomposite Photoelectrodes Dye-Sensitized Solar Cell on Photovoltaic Performance with Various Annealing Temperatures |
| title_sort | morphological effect of cnt tio2 nanocomposite photoelectrodes dye sensitized solar cell on photovoltaic performance with various annealing temperatures |
| url | http://dx.doi.org/10.1155/2015/501978 |
| work_keys_str_mv | AT mohdzikrirazali morphologicaleffectofcnttio2nanocompositephotoelectrodesdyesensitizedsolarcellonphotovoltaicperformancewithvariousannealingtemperatures AT hudaabdullah morphologicaleffectofcnttio2nanocompositephotoelectrodesdyesensitizedsolarcellonphotovoltaicperformancewithvariousannealingtemperatures AT izamarlinaasaahari morphologicaleffectofcnttio2nanocompositephotoelectrodesdyesensitizedsolarcellonphotovoltaicperformancewithvariousannealingtemperatures |