Random Nanowires of Nickel Doped TiO2 With High Surface Area and Electron Mobility for High Efficiency Dye-Sensitized Solar Cells
Mesoporous TiO(2) with a large specific surface area (~150 m(2) g(-1)) is the most successful material in dye-sensitized solar cells so far; however, its inferior charge mobility is a major efficiency limiter. This paper demonstrates that random nanowires of Ni-doped TiO(2) (Ni:TiO(2)) have a dramat...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Royal Society of Chemistry
2013
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| Online Access: | http://umpir.ump.edu.my/id/eprint/4703/1/1.pdf |
| _version_ | 1825821548286574592 |
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| author | Rajan, Jose M. M., Yusoff Archana, P. S. Kumar, E. Naveen Vijila, C. Ramakrishna, S. |
| author_facet | Rajan, Jose M. M., Yusoff Archana, P. S. Kumar, E. Naveen Vijila, C. Ramakrishna, S. |
| author_sort | Rajan, Jose |
| collection | UMP |
| description | Mesoporous TiO(2) with a large specific surface area (~150 m(2) g(-1)) is the most successful material in dye-sensitized solar cells so far; however, its inferior charge mobility is a major efficiency limiter. This paper demonstrates that random nanowires of Ni-doped TiO(2) (Ni:TiO(2)) have a dramatic influence on the particulate and charge transport properties. Nanowires (dia ~60 nm) of Ni:TiO(2) with a specific surface area of ~80 m(2) g(-1) were developed by an electrospinning technique. The band gap of the Ni:TiO(2) shifted to the visible region upon doping of 5 at% Ni atoms. The Mott-Schottky analysis shows that the flat band potential of Ni:TiO(2) shifts to a more negative value than the undoped samples. The electrochemical impedance spectroscopic measurements showed that the Ni:TiO(2) offer lower charge transport resistance, higher charge recombination resistance, and enhanced electron lifetime compared to the undoped samples. The dye-sensitized solar cells fabricated using the Ni:TiO(2) nanowires showed an enhanced photoconversion efficiency and short-circuit current density compared to the undoped analogue. The transient photocurrent measurements showed that the Ni:TiO(2) has improved charge mobility compared with TiO(2) and is several orders of magnitude higher compared to the P25 particles. |
| first_indexed | 2024-03-06T11:43:12Z |
| format | Article |
| id | UMPir4703 |
| institution | Universiti Malaysia Pahang |
| language | English |
| last_indexed | 2024-03-06T11:43:12Z |
| publishDate | 2013 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | UMPir47032018-01-22T01:15:04Z http://umpir.ump.edu.my/id/eprint/4703/ Random Nanowires of Nickel Doped TiO2 With High Surface Area and Electron Mobility for High Efficiency Dye-Sensitized Solar Cells Rajan, Jose M. M., Yusoff Archana, P. S. Kumar, E. Naveen Vijila, C. Ramakrishna, S. QD Chemistry Mesoporous TiO(2) with a large specific surface area (~150 m(2) g(-1)) is the most successful material in dye-sensitized solar cells so far; however, its inferior charge mobility is a major efficiency limiter. This paper demonstrates that random nanowires of Ni-doped TiO(2) (Ni:TiO(2)) have a dramatic influence on the particulate and charge transport properties. Nanowires (dia ~60 nm) of Ni:TiO(2) with a specific surface area of ~80 m(2) g(-1) were developed by an electrospinning technique. The band gap of the Ni:TiO(2) shifted to the visible region upon doping of 5 at% Ni atoms. The Mott-Schottky analysis shows that the flat band potential of Ni:TiO(2) shifts to a more negative value than the undoped samples. The electrochemical impedance spectroscopic measurements showed that the Ni:TiO(2) offer lower charge transport resistance, higher charge recombination resistance, and enhanced electron lifetime compared to the undoped samples. The dye-sensitized solar cells fabricated using the Ni:TiO(2) nanowires showed an enhanced photoconversion efficiency and short-circuit current density compared to the undoped analogue. The transient photocurrent measurements showed that the Ni:TiO(2) has improved charge mobility compared with TiO(2) and is several orders of magnitude higher compared to the P25 particles. Royal Society of Chemistry 2013-10-04 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/4703/1/1.pdf Rajan, Jose and M. M., Yusoff and Archana, P. S. and Kumar, E. Naveen and Vijila, C. and Ramakrishna, S. (2013) Random Nanowires of Nickel Doped TiO2 With High Surface Area and Electron Mobility for High Efficiency Dye-Sensitized Solar Cells. Dalton Transactions, 42. pp. 1024-1032. ISSN 1477-9226 (print); 1477-9234 (online). (Published) http://dx.doi.org/10.1039/C2DT31775C DOI: 10.1039/C2DT31775C |
| spellingShingle | QD Chemistry Rajan, Jose M. M., Yusoff Archana, P. S. Kumar, E. Naveen Vijila, C. Ramakrishna, S. Random Nanowires of Nickel Doped TiO2 With High Surface Area and Electron Mobility for High Efficiency Dye-Sensitized Solar Cells |
| title | Random Nanowires of Nickel Doped TiO2 With High Surface Area and Electron Mobility for High Efficiency Dye-Sensitized Solar Cells |
| title_full | Random Nanowires of Nickel Doped TiO2 With High Surface Area and Electron Mobility for High Efficiency Dye-Sensitized Solar Cells |
| title_fullStr | Random Nanowires of Nickel Doped TiO2 With High Surface Area and Electron Mobility for High Efficiency Dye-Sensitized Solar Cells |
| title_full_unstemmed | Random Nanowires of Nickel Doped TiO2 With High Surface Area and Electron Mobility for High Efficiency Dye-Sensitized Solar Cells |
| title_short | Random Nanowires of Nickel Doped TiO2 With High Surface Area and Electron Mobility for High Efficiency Dye-Sensitized Solar Cells |
| title_sort | random nanowires of nickel doped tio2 with high surface area and electron mobility for high efficiency dye sensitized solar cells |
| topic | QD Chemistry |
| url | http://umpir.ump.edu.my/id/eprint/4703/1/1.pdf |
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