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Improved electron transportation of dye-sensitized solar cells using uniform mixed CNTs-TiO sub(2) photoanode prepared by a new polymeric gel process

Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 2013-09, Vol.15 (9), p.1-10

ISSN: 1388-0764 ;EISSN: 1572-896X ;DOI: 10.1007/s11051-013-1961-2

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  • Title:
    Improved electron transportation of dye-sensitized solar cells using uniform mixed CNTs-TiO sub(2) photoanode prepared by a new polymeric gel process
  • Author: Bakhshayesh, A M ; Mohammadi, M R ; Masihi, N ; Akhlaghi, M H
  • Subjects: Dyes
  • Is Part Of: Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 2013-09, Vol.15 (9), p.1-10
  • Description: A new facile strategy for fabrication of high surface area electrode in the form of mixtures of coated carbon nanotubes (CNTs) and TiO sub(2) nanoparticles with various weight ratios is reported. The so-called polymeric gel process was used to deposit thick film containing uniform distribution of TiO sub(2) nanoparticles and coated CNTs with high porosity by dip coating for dye-sensitized solar cells (DSSCs) applications. Based on simultaneous differential thermal analysis, the minimum annealing temperature to obtain inorganic- and organic-free films was determined at 500 degree C. X-ray diffraction analysis revealed that deposited films were composed of primary nanoparticles with crystallite size in the range 21-45 nm. Field emission scanning electron microscope images showed that deposited films had porous morphology containing uniform spherical particles with diameter around 2.5 mu m and coated CNTs with TiO sub(2) nanoparticles (TNTs). The spherical particles were composed of small nanoparticles (~60 nm), improving light scattering and dye loading of the DSSC. Moreover, TNTs were uniformly incorporated into the electrodes, improving electron transportation. X-ray photoelectron spectroscopy was presented as an obvious proof for the inclusion of CNTs into the TiO sub(2) matrix. Ultraviolet-visible spectroscopy showed that CNT introduction enhanced the visible light absorption of photoanode by shifting the absorption onset to visible light region. An enhancement of power conversion efficiency (PCE) from 6.53 % for pure TiO sub(2) to 7.38 % for CNT-TiO sub(2) electrode containing 0.025 wt% CNTs was achieved. This well-incorporated study would present an intellectual development in the fabrication of low-cost CNT consolidated DSSCs with high PCE.
  • Language: English
  • Identifier: ISSN: 1388-0764
    EISSN: 1572-896X
    DOI: 10.1007/s11051-013-1961-2
  • Source: ProQuest Databases
    Alma/SFX Local Collection
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