Dye solar cell based on nanocrystalline TiO2 has the potential to reach low cost in future indoor power applications. To realize its application for powering the electrical appliances, dye solar cell (DSC) must be made mechanically robust and flexible where indium-doped tin oxide (ITO-PEN) film substrate will be used as the working electrode. In terms of fabrication process, the ITO-PEN film is easier to handle in a process such as cutting of larger film sheet into smaller individual modules or cell. Moreover the processing of the film into complete flexible solar cells can be realized by means of a continuous roll to roll production process. The paper reports the study on the fabrication of dye solar cell on the flexible ITO-PEN. Here, the temperature constraint in the sintering process is addressed by using low temperature of 150°C and further enhanced with direct heat on the photo-electrode at 140°C to achieve a good bonding between the ITO and the deposited TiO2 film. The TiO2 coated ITO-PEN substrate was then soaked in commercial N719 dye, assembled into test cell, and tested under the standard test condition at irradiance of 1000 W/m2 with AM1.5 solar simulator. The fabricated flexible ITO-PEN DSC test cell was found to have an efficiency of 2.1 which is comparatively lower to DSC cell based on TCO rigid glass. This is attributed to the overall higher internal resistance of TiO2 film as a result of incomplete decomposition of ethyl cellulose at low sintering temperature. © 2012 American Institute of Physics.