Advanced Laser Technologies for Efficient Crystalline Silicon Solar Cells

Laser processing has emerged as a critical enabling technology in the manufacturing of high-efficiency crystalline silicon (c-Si) solar cells. This review systematically examines the fundamental principles and applications of laser technology within the photovoltaic industry. It begins by analyzing the critical influence of laser parameters on the laser-material interaction mechanisms, which ultimately determine the processing quality and the extent of thermal damage. A concise historical overview traces the evolution of laser applications from early laboratory research to later large-scale production of crystalline silicon solar cells. The core of the review is dedicated to a detailed discussion of specific application domains: the utilization of laser thermal effects for doping, oxidation, and crystallization; laser patterning for creating selective emitters, opening passivation layers, and defining intricate structures; and the revolutionary role of lasers in advanced metallization techniques, notably laser pattern transfer printing and laser-assisted sintering. Finally, the review outlines future development trends, highlighting the potential of ultrafast lasers, their integration with novel tandem cell concepts, and the rise of smart, multi-functional stations to push the efficiency and cost-effectiveness of c-Si solar cells.