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

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192 Citations (Scopus)

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 languageEnglish
Pages (from-to)1026-1031
Number of pages6
JournalNanotechnology
Volume17
Issue number4
DOIs
Publication statusPublished - 2006 Feb 28

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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    Onozuka, K., Ding, B., Tsuge, Y., Naka, T., Yamazaki, M., Sugi, S., Ohno, S., Yoshikawa, M., & Shiratori, S. (2006). Electrospinning processed nanofibrous TiO2 membranes for photovoltaic applications. Nanotechnology, 17(4), 1026-1031. https://doi.org/10.1088/0957-4484/17/4/030