A higher performance dye-sensitized solar cell based on the modified PMII/EMIMBF₄ binary room temperature ionic liquid electrolyte

Abstract

Additives and iodine (I₂) are used to modify the binary room temperature ionic liquid (RTIL) electrolyte to enhance the photovoltaic performance of dye-sensitized solar cells (DSSCs). The short-circuit current density (J_SC) of 17.89 mA/cm², open circuit voltage (V_OC) of 0.71 V and fill factor (FF) of 0.50 are achieved in the optimal device. An average photoelectric conversion efficiency (PCE) of 6.35% is achieved by optimization, which is over two times larger than that of the parent device before optimization (2.06%), while the maximum PCE can reach up to 6.63%.

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