Electrospinning processed nanofibrous TiO2 membranes for photovoltaic applications

Katsuhiro Onozuka, Bin Ding, Yosuke Tsuge, Takayuki Naka, Michiyo Yamazaki, Shinichiro Sugi, Shingo Ohno, Masato Yoshikawa, Seimei Shiratori

研究成果: Article査読

195 被引用数 (Scopus)

抄録

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%.

本文言語English
ページ(範囲)1026-1031
ページ数6
ジャーナルNanotechnology
17
4
DOI
出版ステータスPublished - 2006 2 28

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 化学 (全般)
  • 材料科学(全般)
  • 材料力学
  • 機械工学
  • 電子工学および電気工学

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