Performance enhancement of dye solar cell using mixed synthetic organic dyes

Abstract

The potential of dyes derived from Bromophenol and Rhodamine, both as single and mixed dyes, in dye-sensitized solar cells (DSSCs) to achieve panchromatic light harvesting and enhance cell performance is assessed in this study. The study finds that a high molar extinction coefficient caused by the combined properties of the dyes matched with the spectrum area where the novel sensitizers deficit light-harvesting, indicating effective co-sensitization. To ascertain the dyes' characteristics and appropriateness as sensitizers, a variety of methods, including cyclic voltammetry, UV–Vis spectroscopy, and Fourier-transform infrared spectroscopy (FTIR), are used. Cyclic voltammetry results indicate that the dyes under study exhibit excellent redox stability and sufficient thermodynamic dynamic force for efficient electron introduction. According to the photovoltaic performance statistics, the mixed dye of Rhodamine and Bromophenol based cell had the maximum efficiency (η) and power (Jsc) are 4.06 mA and 1.29 %, respectively. This is made feasible by photosensitive light-harvesting, remarkable visual activity, and sufficient energy levels. Acidified mixed dyes were more able to load on the TiO2 surface due to their homogenous dispersion, reduced steric barriers, and multi-anchor group connected to the semiconductor surface. With such novel mixed dye, it is expected that the mixed dye with not only high efficiency but higher Jsc value will be an alternative to single dyed based DSSCs.