Random Nanowires of Nickel Doped TiO2 With High Surface Area and Electron Mobility for High Efficiency Dye-Sensitized Solar Cells

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...

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Main Authors: Rajan, Jose, M. M., Yusoff, Archana, P. S., Kumar, E. Naveen, Vijila, C., Ramakrishna, S.
Format: Article
Language:English
Published: Royal Society of Chemistry 2013
Subjects:
QD Chemistry
Online Access:http://umpir.ump.edu.my/id/eprint/4703/
http://umpir.ump.edu.my/id/eprint/4703/
http://umpir.ump.edu.my/id/eprint/4703/
http://umpir.ump.edu.my/id/eprint/4703/1/1.pdf
id ump-4703
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spelling ump-47032018-01-22T01:15:04Z 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) http://dx.doi.org/10.1039/C2DT31775C DOI: 10.1039/C2DT31775C
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic QD Chemistry
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
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.
format Article
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
title 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_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_sort random nanowires of nickel doped tio2 with high surface area and electron mobility for high efficiency dye-sensitized solar cells
publisher Royal Society of Chemistry
publishDate 2013
url http://umpir.ump.edu.my/id/eprint/4703/
http://umpir.ump.edu.my/id/eprint/4703/
http://umpir.ump.edu.my/id/eprint/4703/
http://umpir.ump.edu.my/id/eprint/4703/1/1.pdf
first_indexed 2023-09-18T21:59:33Z
last_indexed 2023-09-18T21:59:33Z
_version_ 1777414306412888064

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