Dye-sensitized solar cells (DSSCs) require the sintering of TiO2 paste at 450-550 degrees C in their manufacture. However, high-temperature sintering is disadvantageous because it limits the use of materials that cannot withstand high temperatures. We have developed a new technique for reducing the sintering temperature through ultraviolet (UV) treatment of the TiO2 photoelectrode. The UV treatment enables the sintering temperature to be reduced 250 degrees C while maintaining the energy conversion efficiency.