• Proceedings of the Materials Research Society of Korea Conference
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• 2005.05a
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• pp.114-114
• /
• 2005

• Proceedings of the Materials Research Society of Korea Conference
• /
• 1993.11a
• /
• pp.152-153
• /
• 1993

• Proceedings of the Korean Vacuum Society Conference
• /
• 2004.08a
• /
• pp.140-140
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• 2004

• Proceedings of the Korean Magnestics Society Conference
• /
• 2002.04a
• /
• pp.98-99
• /
• 2002

• Proceedings of the Korean Ceranic Society Conference
• /
• 2003.10a
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• pp.136.2-136
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• 2003

• Proceedings of the Korean Ceranic Society Conference
• /
• 2003.10a
• /
• pp.141.2-141
• /
• 2003

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2001.11a
• /
• pp.15-16
• /
• 2001

• Proceedings of the Korean Society of Potoscience Conference
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• 2005.06a
• /
• pp.129-129
• /
• 2005

• Korean Chemical Engineering Research
• /
• v.56 no.4
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• pp.447-452
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• 2018

Titanium nanotubes (TNT) of various lengths ranging from $0.34^{\circ}C$ to a maximum of $8.9^{\circ}C$ were prepared by anodizing a titanium metal sheet in an electrolyte containing fluorine ion ($F^-$) of HF, NaF and $NH_4F$. When TNT prepared by anodizing was calcined at $450^{\circ}C$, anatase crystals with photo activity were formed. The TNT-based dye-sensitized solar cell (DSSC) showed a maximum conversion efficiency of 4.71% when the TNT length was $2.5{\mu}m$. This value was about 18% higher than photo conversion efficiency of the FTO-based DSSC coated with titania paste. And the short circuit current density ($J_{sc}$) of the TNT-DSSC was $9.74mA/cm^2$, which was about 35% higher than the $7.19mA/cm^2$ of FTO-DSSC. The reason for the higher conversion efficiency of TNT-DSSC solar cells is that photoelectrons generated from dyes are rapidly transferred to the electrode surface through TNT, and the recombination of photoelectrons and dyes is suppressed.

• Korean Chemical Engineering Research
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• v.52 no.3
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• pp.388-394
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• 2014

Inorganic-organic hybrid coating solutions were synthesized using titania sol from titanium isopropoxide (TTIP) as an inorganic component and mixture of two or three types of silane coupling agents, such as methacryloxypropyl trimethoxysilane (MPTMS), aminopropyl triethoxysilane (APS), glycidoxypropyl trimethoxysilane (GPTMS) and vinyltriethoxysilane (VTES) as an organic component. The hard coating films were obtained by spin-coating on the polycarbonate sheets and curing the inorganic-organic hybrid coating solutions. The coating films made from the mixture of two types of silane coupling agents showed poor pencil hardness and adhesion, while those from the mixture of three types of silane coupling agents exhibited an improved pencil hardness of 2H~4H and adhesion of 5B. The refractive indexes of coating films were increased from 1.56 to 1.63 at 550 nm by increasing the content of titania sols from 20 to 30 g.