Abstract
We have recently fabricated dye-sensitized solar cells (DSSCs) comprising nanofibrous TiO2 membranes as electrode materials. A thin TiO 2 film was pre-deposited on fluorine doped tin oxide (FTO) coated conducting glass substrate by immersion in TiF4 aqueous solution to reduce the electron back-transfer from FTO to the electrolyte. The composite polyvinyl acetate (PVac)/titania nanofibrous membranes can be deposited on the pre-deposited thin TiO2 film coated FTO by electrospinning of a mixture of PVac and titanium isopropoxide in N,N-dimethylformamide (DMF). The nanofibrous TiO2 membranes were obtained by calcining the electrospun composite nanofibres of PVac/titania as the precursor. Spectral sensitization of the nanofibrous TiO2 membranes was carried out with a ruthenium (II) complex, cis-dithiocyanate-N,N′-bis(2,2 ′-bipyridyl-4,4′-dicarboxylic acid) ruthenium (II) dihydrate. The results indicated that the photocurrent and conversion efficiency of electrodes can be increased with the addition of the pre-deposited TiO2 film and the adhesion treatment using DMF. Additionally, the dye loading, photocurrent, and efficiency of the electrodes were gradually increased by increasing the average thickness of the nanofibrous TiO2 membranes. The efficiency of the fibrous TiO2 photoelectrode with the average membrane thickness of 3.9 νm has a maximum value of 4.14%.
| Original language | English |
|---|---|
| Pages (from-to) | 1026-1031 |
| Number of pages | 6 |
| Journal | Nanotechnology |
| Volume | 17 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2006 Feb 28 |
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ASJC Scopus subject areas
- Engineering (miscellaneous)
- Materials Science(all)
- Physics and Astronomy (miscellaneous)
Cite this
Electrospinning processed nanofibrous TiO2 membranes for photovoltaic applications. / Onozuka, Katsuhiro; Ding, Bin; Tsuge, Yosuke; Naka, Takayuki; Yamazaki, Michiyo; Sugi, Shinichiro; Ohno, Shingo; Yoshikawa, Masato; Shiratori, Seimei.
In: Nanotechnology, Vol. 17, No. 4, 28.02.2006, p. 1026-1031.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrospinning processed nanofibrous TiO2 membranes for photovoltaic applications
AU - Onozuka, Katsuhiro
AU - Ding, Bin
AU - Tsuge, Yosuke
AU - Naka, Takayuki
AU - Yamazaki, Michiyo
AU - Sugi, Shinichiro
AU - Ohno, Shingo
AU - Yoshikawa, Masato
AU - Shiratori, Seimei
PY - 2006/2/28
Y1 - 2006/2/28
N2 - We have recently fabricated dye-sensitized solar cells (DSSCs) comprising nanofibrous TiO2 membranes as electrode materials. A thin TiO 2 film was pre-deposited on fluorine doped tin oxide (FTO) coated conducting glass substrate by immersion in TiF4 aqueous solution to reduce the electron back-transfer from FTO to the electrolyte. The composite polyvinyl acetate (PVac)/titania nanofibrous membranes can be deposited on the pre-deposited thin TiO2 film coated FTO by electrospinning of a mixture of PVac and titanium isopropoxide in N,N-dimethylformamide (DMF). The nanofibrous TiO2 membranes were obtained by calcining the electrospun composite nanofibres of PVac/titania as the precursor. Spectral sensitization of the nanofibrous TiO2 membranes was carried out with a ruthenium (II) complex, cis-dithiocyanate-N,N′-bis(2,2 ′-bipyridyl-4,4′-dicarboxylic acid) ruthenium (II) dihydrate. The results indicated that the photocurrent and conversion efficiency of electrodes can be increased with the addition of the pre-deposited TiO2 film and the adhesion treatment using DMF. Additionally, the dye loading, photocurrent, and efficiency of the electrodes were gradually increased by increasing the average thickness of the nanofibrous TiO2 membranes. The efficiency of the fibrous TiO2 photoelectrode with the average membrane thickness of 3.9 νm has a maximum value of 4.14%.
AB - We have recently fabricated dye-sensitized solar cells (DSSCs) comprising nanofibrous TiO2 membranes as electrode materials. A thin TiO 2 film was pre-deposited on fluorine doped tin oxide (FTO) coated conducting glass substrate by immersion in TiF4 aqueous solution to reduce the electron back-transfer from FTO to the electrolyte. The composite polyvinyl acetate (PVac)/titania nanofibrous membranes can be deposited on the pre-deposited thin TiO2 film coated FTO by electrospinning of a mixture of PVac and titanium isopropoxide in N,N-dimethylformamide (DMF). The nanofibrous TiO2 membranes were obtained by calcining the electrospun composite nanofibres of PVac/titania as the precursor. Spectral sensitization of the nanofibrous TiO2 membranes was carried out with a ruthenium (II) complex, cis-dithiocyanate-N,N′-bis(2,2 ′-bipyridyl-4,4′-dicarboxylic acid) ruthenium (II) dihydrate. The results indicated that the photocurrent and conversion efficiency of electrodes can be increased with the addition of the pre-deposited TiO2 film and the adhesion treatment using DMF. Additionally, the dye loading, photocurrent, and efficiency of the electrodes were gradually increased by increasing the average thickness of the nanofibrous TiO2 membranes. The efficiency of the fibrous TiO2 photoelectrode with the average membrane thickness of 3.9 νm has a maximum value of 4.14%.
UR - http://www.scopus.com/inward/record.url?scp=31944435201&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=31944435201&partnerID=8YFLogxK
U2 - 10.1088/0957-4484/17/4/030
DO - 10.1088/0957-4484/17/4/030
M3 - Article
VL - 17
SP - 1026
EP - 1031
JO - Nanotechnology
JF - Nanotechnology
SN - 0957-4484
IS - 4
ER -