DOI: 10.5176/2251-189X_SEES24

Authors: Chul Rho, Heayeon Lee & Jung Sang Suh

Abstract: We have fabricated dye-sensitized solar cells (DSSCs) based on TiO2 nanotube membranes attached to fluorine-doped thin oxide (FTO) glass, whose channels were filled with nanoparticles. The bottom barrier layer of free-standing TiO2 nanotube arrays was removed by ion milling. The channels of TiO2 nanotube membranes were filled with nanoparticles by vacuum filtering. The membrane was then glued to FTO glass with TiO2 paste. By filling approximately 10 wt{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} of TiO2 nanoparticles to the membrane weight in the channels of the membrane, the energy conversion efficiency was enhanced from 5.2 {6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} to 6.3 {6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465}, corresponding to 21 {6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} enhancement. By treating with TiCl4 after filling with the TiO2 nanoparticles, the efficiency was enhanced from 5.2 {6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} to 7.3 {6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} (a 40{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} enhancement) due to increasing the total available surface area for dye adsorption. When Ag and TiO2 nanoparticles were filled together in the channels of the membrane, the energy conversion efficiency was more enhanced than being filled only one kind of nanoparticles.

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