結晶系シリコン太陽電池の将来展望と新規作製技術(<特集>次世代太陽電池)

概要

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Gross product of photovoltaic (PV) system is increasing exponentially in recent years, and PV is expected as one of the infra-structure energy sources required in the future sustainably developing world. Crystalline silicon solar cells are the most promising devices, and the improvement of conversion efficiency and development of mass production process are strongly required. Laser doping has a lot of advantages for low cost processing and achieving high efficiency crystalline silicon solar cells. Selectively doped regions (so-called "selective emitter" formation) are achieved by laser doping at room temperatures without necessity of using masks and photolithography. After optimizing the laser power and doping conditions selective emitter structure can effectively improve solar cell performances, which reveals the feasibility of laser doping in the future mass production processes.
2012-05-20