Role of acid-treated CNTs in chemical and electrochemical impedance study of dye-sensitised solar cell
Carbon; Carbon nanotubes; Chemical analysis; Chemical bonds; Defects; Efficiency; Electrochemical impedance spectroscopy; Electrons; Energy gap; Fourier transform infrared spectroscopy; High resolution transmission electron microscopy; Indium compounds; Multiwalled carbon nanotubes (MWCN); Nanotubes...
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my.uniten.dspace-238962023-05-29T14:52:55Z Role of acid-treated CNTs in chemical and electrochemical impedance study of dye-sensitised solar cell Mahalingam S. Abdullah H. Manap A. 55434075500 26025061200 57200642155 Carbon; Carbon nanotubes; Chemical analysis; Chemical bonds; Defects; Efficiency; Electrochemical impedance spectroscopy; Electrons; Energy gap; Fourier transform infrared spectroscopy; High resolution transmission electron microscopy; Indium compounds; Multiwalled carbon nanotubes (MWCN); Nanotubes; Open circuit voltage; Sol-gel process; Sol-gels; Solar cells; Spectrum analysis; Thin films; X ray photoelectron spectroscopy; Yarn; Acid treatments; Body-centered-cubic phase; Electrical; Electrochemical impedance; Electron recombinations; Internal structure; Visible spectrophotometries; X ray diffractometers; Dye-sensitized solar cells This study aims on the degradation performance of In2O3 and In2O3 mixed with acid-treated CNTs (MWCNTS and SWCNTs) for dye-sensitised solar cell (DSSC) application. The thin films were prepared by sol-gel method using spin coating technique annealed at 450 �C. The pristine carbon nanotubes were chemically treated in an acid mixture of H2SO4/HNO3 to improve the performance of CNTs addition in In2O3-based DSSC. The X-ray diffractometer result proves the thin films possess body-centered cubic phase (JCPDS no. 01-071-2194). The high resolution-transmission electron microscopy analysis shows the internal structures of CNTs before and after acid-treatment process. Meanwhile, the ultraviolet�visible spectrophotometry analysis determines lower energy band gap in the acid-treated CNTs by increasing the open circuit voltage. However, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy analysis revealed acid treatment process in MWCNTs caused more defects that influenced the performance of DSSC. The FTIR peaks confirm the formation of COOH groups at the CNTs after the acid treatment process. Furthermore, the appearance of shoulder like arc at both In 3d5/2 and In 3d3/2 in the XPS peaks in In2O3-SWCNTs indicates a good interaction of chemical bonding between In2O3 and SWCNTs. Besides that, In2O3-SWCNTs possesses slower electron recombination rate with longer electron lifetime of 3.03 m s. Although, In2O3-MWCNTs exhibits higher short circuit current density (Jsc) than In2O3-SWCNTs the occurrence of defects during acid treatment in MWCNTs caused higher electron recombination rate and decreased the electron lifetime of the cell. � 2018 Elsevier Ltd Final 2023-05-29T06:52:55Z 2023-05-29T06:52:55Z 2018 Article 10.1016/j.electacta.2018.01.138 2-s2.0-85041379920 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041379920&doi=10.1016%2fj.electacta.2018.01.138&partnerID=40&md5=a87cc89f26b29874921305f8e689d033 https://irepository.uniten.edu.my/handle/123456789/23896 264 275 283 Elsevier Ltd Scopus |
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Carbon; Carbon nanotubes; Chemical analysis; Chemical bonds; Defects; Efficiency; Electrochemical impedance spectroscopy; Electrons; Energy gap; Fourier transform infrared spectroscopy; High resolution transmission electron microscopy; Indium compounds; Multiwalled carbon nanotubes (MWCN); Nanotubes; Open circuit voltage; Sol-gel process; Sol-gels; Solar cells; Spectrum analysis; Thin films; X ray photoelectron spectroscopy; Yarn; Acid treatments; Body-centered-cubic phase; Electrical; Electrochemical impedance; Electron recombinations; Internal structure; Visible spectrophotometries; X ray diffractometers; Dye-sensitized solar cells |
| author2 |
55434075500 |
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55434075500 Mahalingam S. Abdullah H. Manap A. |
| format |
Article |
| author |
Mahalingam S. Abdullah H. Manap A. |
| spellingShingle |
Mahalingam S. Abdullah H. Manap A. Role of acid-treated CNTs in chemical and electrochemical impedance study of dye-sensitised solar cell |
| author_sort |
Mahalingam S. |
| title |
Role of acid-treated CNTs in chemical and electrochemical impedance study of dye-sensitised solar cell |
| title_short |
Role of acid-treated CNTs in chemical and electrochemical impedance study of dye-sensitised solar cell |
| title_full |
Role of acid-treated CNTs in chemical and electrochemical impedance study of dye-sensitised solar cell |
| title_fullStr |
Role of acid-treated CNTs in chemical and electrochemical impedance study of dye-sensitised solar cell |
| title_full_unstemmed |
Role of acid-treated CNTs in chemical and electrochemical impedance study of dye-sensitised solar cell |
| title_sort |
role of acid-treated cnts in chemical and electrochemical impedance study of dye-sensitised solar cell |
| publisher |
Elsevier Ltd |
| publishDate |
2023 |
| _version_ |
1806428360984756224 |
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13.214268 |