Exploring the potential of natural dyes in DSSCs: Innovations for efficient light harvesting and charge separation through Co-sensitization

Abstract

Dye-sensitized solar cells (DSSCs) are a cost-effective and environmentally benign third-generation photovoltaic technology that is gaining prominence in the changing renewable energy sector. Our study presents the concept of co-sensitization, which involves the combination of TiO2QD with MWCNT/TiO2, in order to improve the efficiency of solar energy conversion greatly. The efficiency of these solar cells is highly dependent on the efficacy of the dye as a photosensitizer. The results indicate that DSSCs employing the co-sensitized approach with TiO2QD achieved an efficiency (η) of 0.331, an open circuit voltage (Voc) of 0.539 (V), a short circuit current density (Jsc) of 0.095 (mA/cm2), and a fill factor (FF) of 37 %. On the other hand, DSSCs utilizing the MWCNT/TiO2 photoanode demonstrated an efficiency (η) of 0.213 %, an open circuit voltage (Voc) of 0.509 (V), a short circuit current density (Jsc) of 0.076 (mA/cm2), and a fill factor (FF) of 17 %. In the ever-changing world of renewable energy, cutting-edge methods like co-sensitization could boost solar energy conversion technology efficiency and sustainability. Innovative methods like employing plant leaf dye as photosensitizers for DSSCs are eco-friendly and could cut production costs. Using natural dyes supports sustainable practices and makes solar energy production more affordable and accessible.