Thin Films and Sensors : Regular Paper ; A Formation of Hole Pattern on Ti Electrode by Lift-off and Its Application to TCO-less Dye-sensitized Solar Cells

In this study, we propose Ti hole pattern structure on the transparent conductive oxide (TCO) lessdye-sensitized solar cells (DSSCs) using the lift-off process to improve the low light transmittance and lowefficiency caused by opaque Ti electrode. The formation of Ti hole patterns make it possible to move the dyeadsorption and electrolyte. The DSSCs with Ti hole patterns showed a higher photoelectric conversion efficiency(PCE) than those with general structure by 11.1%. As a result, The Ti hole pattern structure can be improved toincrease the light absorption of the dyes and PCE of the TCO-less DSSCs is also increased.