Dye-sensitized TiO2 nanotube solar cells: fabrication and electronic characterization.
TiO2 nanotubes (TNTs) with large aspect ratio and large specific surface area were prepared from P25 (Nippon Aerosil) and applied to dye-sensitized titanium dioxide solar cells (DSSCs). Optimization of fabrication conditions, i.e., pH of the starting paste, sintering temperature for the TiO2 electrodes, electrolyte compositions of DSSCs gave the high conversion efficiency with improved open circuit voltage (V(oc)) and fill factor (FF) when compared to DSSCs made of P25. The evaluation of dye adsorption and the photo-injected electron transport such as electron diffusion coefficient (D) and electron lifetime (tau) in TNTs electrodes revealed that the higher efficiency resulted from increase of electron density with keeping much longer tau in TNTs electrodes than in P25 electrodes.
Ohsaki
Yoshinori
Y
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, 5650871, Japan.
Masaki
Naruhiko
N
Kitamura
Takayuki
T
Wada
Yuji
Y
Okamoto
Takumi
T
Sekino
Toru
T
Niihara
Kohichi
K
Yanagida
Shozo
S
D004396:Coloring Agents / Q000737:chemistry; D011211:Electric Power Supplies; D004566:Electrodes; D004581:Electronics; D004867:Equipment Design; D043942:Nanotubes / Q000737:chemistry*; D010777:Photochemistry; D012666:Semiconductors; D012993:Solar Energy; D013696:Temperature; D014025:Titanium / Q000737:chemistry*
D004396:Coloring Agents; C009495:titanium dioxide; D014025:Titanium