Paper Title
NATURAL DYES IN DYE-SENSITIZED SOLAR CELLS: A COMPREHENSIVE REVIEW

Abstract
Dye-sensitized solar cells (DSSCs) have surfaced as a formidable contender to conventional silicon-based photovoltaics, primarily owing to their cost-effectiveness, facile fabrication, and environmentally benign attributes. This comprehensive review delves into the viability of natural dyes as photosensitizers within DSSCs, with a particular emphasis on their intricate extraction methodologies, physicochemical characterization, and photovoltaic efficacy. Natural dyes, procured from botanical sources such as anthocyanins, betalains, chlorophylls, and carotenoids, present a sustainable paradigm for harnessing solar energy. However, critical impediments persist, notably their suboptimal power conversion efficiency and susceptibility to photodegradation over prolonged operational durations. This discourse rigorously evaluates an array of performance-enhancing strategies, encompassing molecular functionalization, synergistic co-sensitization approaches, and electrolyte engineering to augment charge transfer kinetics. Furthermore, recent technological advancements in fabrication methodologies and the feasibility of large-scale industrial deployment of DSSCs are systematically analyzed. The study underscores the imperative of refining natural dye-based DSSCs to mitigate stability constraints and bolster scalability. Prospective research trajectories entail the integration of hybrid DSSCs, the refinement of encapsulation methodologies, and the application of artificial intelligence-driven computational models to optimize dye selection, thereby enhancing both efficiency and long-term durability. Keywords - TiO2 nanomaterials, Dye Sensitized solar cell.