Abstract: Hydrothermal is in a special airtight containers reaction (autoclave), a solution for the reaction medium, the reaction by heating containers, creating a high-temperature, high-pressure response to the environment, usually made of insoluble or soluble and insoluble material recrystallization. We use tetra-isopropyl titanate and hot water in the reactor, after a high-temperature, high-pressure to synthesize the TiO2 crystals. TiO2 colloid were prepared by adding a series of surfactants. Devices were fabricated and characterized, and the influence of different reactive conditions on performances was discussed. Finally found, this is a better method to make superior solar cells..