Dye-sensitized solar cells (DSCs) show great promise as an alternative to conventional p-n junction solar cells because of their powerful harvesting efficiency, low cost and ease of fabrication.Up till now, it has been confirmed that Pt is a superior electrocatalyst for use as the counter electrode (CE) in DSCs.Despite this, the large-scale commercial use of Pt-based electrocatalysts as the CE materials for DSCs is not economically viable due to the high cost and scarcity of Pt.The development of high efficiency, cheap and earth-abundant alternative electrocatalysts for triiodide reduction reaction is of a great importance for making a concrete step towards the economically viable large-scale DSC applications.