N-TYPE MONOLIKE SILICON BIFACIAL SOLAR CELL: AN ALTERNATIVE WAY OF HIGH EFFICIENCY AND LOW COST

摘要

China "Front Runner Program" leads to huge demand of high efficient solar cells started from 2016. Every company is enthusiastic to develop their own high efficient solar cell technologies and products to keep the competence in this field. sc-Si and mc-Si PERC cells are the most popular among high efficient solar cells, however, the shortage of p-type sc-Si wafer, Al_2O_3 equipment and LIR tools hinder the cost and development of sc-Si PERC. Besides, extra black silicon texturing and severe LID are still the issues for mc-Si PERC. To solve the difficulties suffered in sc-Si and mc-Si PERC cells, n-type monolike silicon bifacial solar cell is developed and presented in this article. The front cell efficiency up to 20.8% in average was realized by industrial-available process and facilities. Zero LID because of the intrinsic characteristic of n-type silicon wafers was proven without LIR process. Module power of 299W_p was achieved with 60 pcs cells and white backsheet. With the development and commercialization of double glass module, it is expected that low cost and high efficient bifacial solar cells will get more and more attention.