Preparation of Nano-Ag-TiO2 Composites by Co-60 Gamma Irradiation to Enhance the Photocurrent of Dye-Sensitized Solar Cells
Nano-silver-titanium dioxide (Ag-TiO2) composites were prepared from commercial TiO2 (P25, Degussa) and silver nitrate (AgNO3) by gamma Co-60 irradiation method with various initial concentrations of AgNO3. The nano-AgTiO2 composites are utilized as the photoanode for dye-sensitized solar cells (DSC...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2019/5737952 |
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| author | Le Thanh Nguyen Huynh Viet Hai Le Thanh Long Vo Thi Kim Lan Nguyen Quoc Hien Nguyen Thai Hoang Nguyen |
| author_facet | Le Thanh Nguyen Huynh Viet Hai Le Thanh Long Vo Thi Kim Lan Nguyen Quoc Hien Nguyen Thai Hoang Nguyen |
| author_sort | Le Thanh Nguyen Huynh |
| collection | DOAJ |
| description | Nano-silver-titanium dioxide (Ag-TiO2) composites were prepared from commercial TiO2 (P25, Degussa) and silver nitrate (AgNO3) by gamma Co-60 irradiation method with various initial concentrations of AgNO3. The nano-AgTiO2 composites are utilized as the photoanode for dye-sensitized solar cells (DSCs). Under full sunlight illumination (1000 W/m2, AM 1.5), the efficiency of DSCs has improved significantly despite the Ag content of below 1%. The DSC—assembled with 0.75 Ag-TiO2 (0.75% Ag) photoanode—showed that the photocurrent was significantly enhanced from 8.1 mA.cm−2 to 9.5 mA.cm−2 compared to the DSCs using bared TiO2 photoanode. The unchanged open-circuit voltage resulted in the overall energy conversion efficiency to be increased by 25% from 3.75% to 4.86%. Electrochemical impedance spectroscopy (EIS) analysis showed that the charge transfer resistance is reduced when increasing Ag content, demonstrating that the charge transfer at TiO2/dye interface was enhanced in the presence of silver nanoparticles. |
| format | Article |
| id | doaj-art-3015b7e1aa5c49f29d0f127e05debd5e |
| institution | OA Journals |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-3015b7e1aa5c49f29d0f127e05debd5e2025-08-20T02:07:55ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2019-01-01201910.1155/2019/57379525737952Preparation of Nano-Ag-TiO2 Composites by Co-60 Gamma Irradiation to Enhance the Photocurrent of Dye-Sensitized Solar CellsLe Thanh Nguyen Huynh0Viet Hai Le1Thanh Long Vo2Thi Kim Lan Nguyen3Quoc Hien Nguyen4Thai Hoang Nguyen5Department of Physical Chemistry, Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, VietnamFaculty of Materials Science and Technology, VNUHCM-University of Science, Ho Chi Minh City, VietnamDepartment of Physical Chemistry, Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, VietnamResearch and Development Center for Radiation Technology, Vietnam Atomic Energy Institute (VAEI), Ho Chi Minh City, VietnamResearch and Development Center for Radiation Technology, Vietnam Atomic Energy Institute (VAEI), Ho Chi Minh City, VietnamDepartment of Physical Chemistry, Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, VietnamNano-silver-titanium dioxide (Ag-TiO2) composites were prepared from commercial TiO2 (P25, Degussa) and silver nitrate (AgNO3) by gamma Co-60 irradiation method with various initial concentrations of AgNO3. The nano-AgTiO2 composites are utilized as the photoanode for dye-sensitized solar cells (DSCs). Under full sunlight illumination (1000 W/m2, AM 1.5), the efficiency of DSCs has improved significantly despite the Ag content of below 1%. The DSC—assembled with 0.75 Ag-TiO2 (0.75% Ag) photoanode—showed that the photocurrent was significantly enhanced from 8.1 mA.cm−2 to 9.5 mA.cm−2 compared to the DSCs using bared TiO2 photoanode. The unchanged open-circuit voltage resulted in the overall energy conversion efficiency to be increased by 25% from 3.75% to 4.86%. Electrochemical impedance spectroscopy (EIS) analysis showed that the charge transfer resistance is reduced when increasing Ag content, demonstrating that the charge transfer at TiO2/dye interface was enhanced in the presence of silver nanoparticles.http://dx.doi.org/10.1155/2019/5737952 |
| spellingShingle | Le Thanh Nguyen Huynh Viet Hai Le Thanh Long Vo Thi Kim Lan Nguyen Quoc Hien Nguyen Thai Hoang Nguyen Preparation of Nano-Ag-TiO2 Composites by Co-60 Gamma Irradiation to Enhance the Photocurrent of Dye-Sensitized Solar Cells International Journal of Photoenergy |
| title | Preparation of Nano-Ag-TiO2 Composites by Co-60 Gamma Irradiation to Enhance the Photocurrent of Dye-Sensitized Solar Cells |
| title_full | Preparation of Nano-Ag-TiO2 Composites by Co-60 Gamma Irradiation to Enhance the Photocurrent of Dye-Sensitized Solar Cells |
| title_fullStr | Preparation of Nano-Ag-TiO2 Composites by Co-60 Gamma Irradiation to Enhance the Photocurrent of Dye-Sensitized Solar Cells |
| title_full_unstemmed | Preparation of Nano-Ag-TiO2 Composites by Co-60 Gamma Irradiation to Enhance the Photocurrent of Dye-Sensitized Solar Cells |
| title_short | Preparation of Nano-Ag-TiO2 Composites by Co-60 Gamma Irradiation to Enhance the Photocurrent of Dye-Sensitized Solar Cells |
| title_sort | preparation of nano ag tio2 composites by co 60 gamma irradiation to enhance the photocurrent of dye sensitized solar cells |
| url | http://dx.doi.org/10.1155/2019/5737952 |
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