Dye-sensitized solar cells: Sensitized with triple dyes in ultraviolet to near infrared

Abstract

Co-sensitization of triple dyes for panchromatic absorption is rare in literature, here we present a dye sensitized solar cell (DSSCs) co-sensitized with molecular engineered organic butyloxyl chain induced Y1 dye, bodipy dye TP2A, and squaraine based dye SQ1. The co-sensitized TP2A+SQ1 showed efficiency of 5.60%. This co-sensitized triple dies shows a wide range of absorption spectrum from 300nm-800nm region under 1 sunlight illumination (100 mW/cm2) in DSSCs operation. By controlling the volumetric ratio a high photocurrent density (JSC) of 14.59 mAcm-2 and 0.703 fill factor were achieved. This yielded to an impressive efficiency of 6.21% for Y1+TP2A+SQ1 co-sensitized dyes, which is higher than that of each individual dyes. It was also observed that the efficiency of co-sensitized triple dyes is higher than co-sensitized of TP2A+SQ1 in solar cells.