NOVELTY - The method comprises forming a titanium dioxide (TiO2) patterned layer (135) on a flexible substrate electrode, forming quantum dots on the TiO2 patterned layer, forming a flexible counter electrode, assembling the substrate electrode having the quantum dots and the flexible counter electrode into a sandwich with a hot melt gasket (120) between the substrate electrode and the counter electrode, and injecting electrolyte and sealant (140) between the substrate electrode and flexible counter electrode to form a solar cell (100).    USE - The method is useful for preparing dye sensitized flexible solar cells, which are useful for: transportation equipment and photovoltaic power-supply system; and supplying mobile electricity for lap-top computers, mobile phones and watches.    ADVANTAGE - The method is capable of simply, economically and rapidly preparing the solar cells with high efficiency and flexibility, lightweight, improved impact resistance and reduced size.    DETAILED DESCRIPTION - The method comprises forming a titanium dioxide (TiO2) patterned layer (135) on a flexible substrate electrode, forming quantum dots on the TiO2 patterned layer, forming a flexible counter electrode, assembling the substrate electrode having the quantum dots and the flexible counter electrode into a sandwich with a hot melt gasket (120) between the substrate electrode and the counter electrode, and injecting electrolyte and sealant (140) between the substrate electrode and flexible counter electrode to form a solar cell (100). The quantum dots are deposited on the TiO2 patterned layer by chemical deposition, and are formed using in-situ synthesis onto the TiO2 patterned layer. The counter electrode includes pin-holes (115). The electrolyte and sealant are: injected through the pinholes; and vacuum backfilled between the counter electrode and substrate. The gasket is heated at 100 degrees C for 10 minutes to adhere the counter electrode to the substrate electrode. An INDEPENDENT CLAIM is included for a device for preparing solar cells.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a flexible solar cell.    Solar cell (100)    Top counter electrode flexible layer (110)    Pinhole (115)    Gasket (120)    Titanium dioxide patterned layer (135)    Electrolyte and sealant. (140)