Improved efficiency of organic dye sensitized solar cells through acid treatment

We have improved the efficiency of the dye sensitization solar cells (DSSCs) by adopting an innovative and simpler methodology of oxalic acid treatment of TiO2. It is observed that the efficiency of the DSSC is improved to 2.3% after treatment. The improvement has been understood in terms of reduced dark current and enhanced dye loading as supported by UV-Visible, electrical and electrochemical impedance measurements.