TY - JOUR
T1 - Fabrication of double layer photoelectrodes using hierarchical TiO 2 nanospheres for dye-sensitized solar cells
AU - Park, Jung Tae
AU - Roh, Dong Kyu
AU - Chi, Won Seok
AU - Patel, Rajkumar
AU - Kim, Jong Hak
PY - 2012/1/25
Y1 - 2012/1/25
N2 - Double layer photoelectrodes consisting of the TiO 2 nanoparticles (npTiO 2) with 30-40nm in diameter and the TiO 2 nanospheres (nsTiO 2) with 100-200nm as a bottom and a top layer, respectively, were fabricated for dye-sensitized solar cells (DSSCs) employing a polymer electrolyte. The nsTiO 2 with hierarchical pores were prepared via the combined process of atom transfer radical polymerization (ATRP) and a sol-gel. Use of nsTiO 2 resulted in the remarkable enhancement of cell performance due to light scattering and dye adsorption capability. The overall energy conversion efficiency (η) of 5.5% was achieved by the formation of npTiO 2-nsTiO 2 double layer photoelectrode, which was higher than those formed by npTiO 2 alone (4.6%) or nsTiO 2-nsTiO 2 double layer (4.4%). Electrochemical impedance spectra (EIS) analysis showed that the npTiO 2-nsTiO 2 double layer had lower electron transfer resistance and longer electron lifetime, leading to facilitation of reduced recombination and consequently improvement of cell performance.
AB - Double layer photoelectrodes consisting of the TiO 2 nanoparticles (npTiO 2) with 30-40nm in diameter and the TiO 2 nanospheres (nsTiO 2) with 100-200nm as a bottom and a top layer, respectively, were fabricated for dye-sensitized solar cells (DSSCs) employing a polymer electrolyte. The nsTiO 2 with hierarchical pores were prepared via the combined process of atom transfer radical polymerization (ATRP) and a sol-gel. Use of nsTiO 2 resulted in the remarkable enhancement of cell performance due to light scattering and dye adsorption capability. The overall energy conversion efficiency (η) of 5.5% was achieved by the formation of npTiO 2-nsTiO 2 double layer photoelectrode, which was higher than those formed by npTiO 2 alone (4.6%) or nsTiO 2-nsTiO 2 double layer (4.4%). Electrochemical impedance spectra (EIS) analysis showed that the npTiO 2-nsTiO 2 double layer had lower electron transfer resistance and longer electron lifetime, leading to facilitation of reduced recombination and consequently improvement of cell performance.
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U2 - 10.1016/j.jiec.2011.11.029
DO - 10.1016/j.jiec.2011.11.029
M3 - Article
AN - SCOPUS:84855508327
SN - 1226-086X
VL - 18
SP - 449
EP - 455
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
IS - 1
ER -