TY - JOUR
T1 - Transmittance optimized nb-doped TiO2/Sn-doped In 2O3 multilayered photoelectrodes for dye-sensitized solar cells
AU - Kim, Dong Hoe
AU - Lee, Sangwook
AU - Park, Jong Hoon
AU - Noh, Jun Hong
AU - Park, Ik Jae
AU - Seong, Won Mo
AU - Hong, Kug Sun
N1 - Funding Information:
This work was supported by the World Class University (WCU) program through the Korea Science and Engineering Foundation funded by the ministry of Education, Science and technology (R31-2008-000–10075-0). And characterization of the crystal structure was supported by Research Institute of Advanced Materials (RIAM).
PY - 2012/1
Y1 - 2012/1
N2 - We adopt a compact TiO2 (c-TiO2) layer on Nb-doped TiO2 (NTO)/Sn-doped indium oxide (ITO) multilayered electrodes, which are transparent conducting oxide (TCO) electrodes, to improve their transmittance for high-efficiency dye-sensitized solar cells (DSSCs). An NTO layer was deposited on ITO by pulsed laser deposition (PLD) and then a c-TiO2 layer was deposited on the NTO/ITO multilayer by spin-coating a sol. The transmittance spectrum of the c-TiO2/NTO/ITO multilayered photoelectrodes varied with the thickness of TiO2. The short circuit current and energy conversion efficiency of the photoelectrodes also varied with the thickness of the c-TiO2 layer, which is similar behavior to the integrated value of the transmittance in the wavelength range from 500 to 600 nm. Finally, the DSSC employing the 160 nm-thick c-TiO2 layer exhibited the most improved energy conversion efficiency, compared to the DSSC without the c-TiO2 layer. Our results demonstrate that the unfavorable optical properties of TCO, e.g. NTO, for DSSCs can be enhanced by the formation of an additional thin layer, e.g. c-TiO2.
AB - We adopt a compact TiO2 (c-TiO2) layer on Nb-doped TiO2 (NTO)/Sn-doped indium oxide (ITO) multilayered electrodes, which are transparent conducting oxide (TCO) electrodes, to improve their transmittance for high-efficiency dye-sensitized solar cells (DSSCs). An NTO layer was deposited on ITO by pulsed laser deposition (PLD) and then a c-TiO2 layer was deposited on the NTO/ITO multilayer by spin-coating a sol. The transmittance spectrum of the c-TiO2/NTO/ITO multilayered photoelectrodes varied with the thickness of TiO2. The short circuit current and energy conversion efficiency of the photoelectrodes also varied with the thickness of the c-TiO2 layer, which is similar behavior to the integrated value of the transmittance in the wavelength range from 500 to 600 nm. Finally, the DSSC employing the 160 nm-thick c-TiO2 layer exhibited the most improved energy conversion efficiency, compared to the DSSC without the c-TiO2 layer. Our results demonstrate that the unfavorable optical properties of TCO, e.g. NTO, for DSSCs can be enhanced by the formation of an additional thin layer, e.g. c-TiO2.
KW - Compact TiO layer
KW - Dye-sensitized solar cells (DSSCs)
KW - Optical modulation
KW - Transparent conducting oxides (TCO)
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U2 - 10.1016/j.solmat.2011.09.011
DO - 10.1016/j.solmat.2011.09.011
M3 - Article
AN - SCOPUS:80955148908
VL - 96
SP - 276
EP - 280
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
SN - 0927-0248
IS - 1
ER -
