The article provides a comprehensive review of recent advancements in Cu2ZnSnS (CZTS) thin-film solar cells (TFSCs). Despite the dominance of thick-film Silicon solar cells in the market, thin-film solar cells have gained popularity due to their advantages over thick cells. CIGS (Copper Indium Gallium Selenide) and CdS (Cadmium Selenide) have shown promising performance in thin-film applications, but their toxicity and cost have limited their feasibility. CZTS, as a replacement for CIGS, has demonstrated superior photovoltaic properties and high light absorption, making it a more cost-effective alternative. The article discusses the development, fabrication process, design, and potential applications of TFSCs, including the challenges and defects in CZTS materials. Despite significant efforts, the single-junction CZTS solar cell has not yet achieved an efficiency exceeding 13%. The review highlights the potential of TFSCs as a viable option for renewable energy solutions, emphasizing the need for further research to enhance their efficiency and commercial viability.The article provides a comprehensive review of recent advancements in Cu2ZnSnS (CZTS) thin-film solar cells (TFSCs). Despite the dominance of thick-film Silicon solar cells in the market, thin-film solar cells have gained popularity due to their advantages over thick cells. CIGS (Copper Indium Gallium Selenide) and CdS (Cadmium Selenide) have shown promising performance in thin-film applications, but their toxicity and cost have limited their feasibility. CZTS, as a replacement for CIGS, has demonstrated superior photovoltaic properties and high light absorption, making it a more cost-effective alternative. The article discusses the development, fabrication process, design, and potential applications of TFSCs, including the challenges and defects in CZTS materials. Despite significant efforts, the single-junction CZTS solar cell has not yet achieved an efficiency exceeding 13%. The review highlights the potential of TFSCs as a viable option for renewable energy solutions, emphasizing the need for further research to enhance their efficiency and commercial viability.