Proceedings Paper
Preparation of flexible TiO2 photoelectrodes for dye-sensitized solar cells| Format | Member Price | Non-Member Price |
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Paper Abstract
Dye-sensitized solar cells (DSSCs) based on nanocrystalline TiO2 photoelectrodes on indium tin oxide (ITO) coated
polymer substrates have drawn great attention due to its lightweight, flexibility and advantages in commercial
applications. However, the thermal instability of polymer substrates limits the process temperature to below 150 °C. In
order to assure high and firm interparticle connection between TiO2 nanocrystals (TiO2-NC) and polymer substrates, the
post-treatment of flexible TiO2 photoelectrodes (F-TiO2-PE) by mechanical compression was employed. In this work,
Degussa P25 TiO2-NC was mixed with tert-butyl alcohol and DI-water to form TiO2 paste. F-TiO2-PE was then prepared
by coating the TiO2 paste onto ITO coated polyethylene terephthalate (PET) substrate using doctor blade followed by
low temperature sintering at 120 °C for 2 hours. To study the effect of mechanical compression, we applied 50 and 100
kg/cm2 pressure on TiO2/PET to complete the fabrication of F-TiO2-PE. The surface morphology of F-TiO2-PE was
characterized using scanning electron microscopy. The resultant F-TiO2-PE sample exhibited a smooth, crack-free
structure indicating the great improvement in the interparticle connection of TiO2-NC. Increase of compression pressure
could lead to the increase of DSSC photoconversion efficiency. The best photoconversion efficiency of 4.19 % (open
circuit voltage (Voc) = 0.79 V, short-circuit photocurrent density (Jsc) = 7.75 mA/cm2, fill factor (FF) = 0.68) was
obtained for the F-TiO2-PE device, which showed great enhancement compared with the F-TiO2-PE cell without
compression treatment. The effect of compression in DSSC performance was vindicated by the electrochemical
impedance spectroscopy measurement.
Paper Details
Date Published: 9 September 2014
PDF: 6 pages
Proc. SPIE 9165, Physical Chemistry of Interfaces and Nanomaterials XIII, 91651O (9 September 2014);
Published in SPIE Proceedings Vol. 9165:
Physical Chemistry of Interfaces and Nanomaterials XIII
Natalie Banerji; Sophia C. Hayes; Carlos Silva, Editor(s)
PDF: 6 pages
Proc. SPIE 9165, Physical Chemistry of Interfaces and Nanomaterials XIII, 91651O (9 September 2014);
Show Author Affiliations
Chia-Feng Lin, National Taipei Univ. of Technology (Taiwan)
Chaochin Su, National Taipei Univ. of Technology (Taiwan)
Chaochin Su, National Taipei Univ. of Technology (Taiwan)
Published in SPIE Proceedings Vol. 9165:
Physical Chemistry of Interfaces and Nanomaterials XIII
Natalie Banerji; Sophia C. Hayes; Carlos Silva, Editor(s)
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