“…The counter electrode is also TCO glass covered with a small amount of platinum (5 -10 μg) and is reponsible for catalytic cathodic reduction of triiode to iodide (I 3 -+ 2e -→ I -). For DSC practical application, many attempts were made to further improve its photovoltaic performance and long-term stability, such as develop new dye molecules, replace the liquid electrolyte, syntheses of new photoanode materials [1], etc., whereas, only few studies of the cathode in DSC have been reported [2,3]. In fact, high electrochemical activity of the cathode is also an important requirement for enhancing DSC performance.…”