本文报道了用50×50毫米~2浇铸多晶Si制成具有密栅、背场结构的低倍(2～5倍)聚光太阳电池,在AM1.5标准光强下,全面积转换效率达到10.2％,有效面积转换效率达到11.46％。在聚光2.73倍时,电池短路电流增益为2.5～2.71倍。在低倍聚光下工作的太阳电池的研制,国内尚未见报道。用多晶硅材料试制成这种电池,有可能进一步降低系统成本,在近期达到20～25元/峰瓦。 In this paper, a low magnification (2 ~ 5 times) concentrating solar cell with a dense grid and a back field structure was fabricated by casting 50 × 50 mm ~ 2 polycrystalline Si. Under AM1.5 standard light intensity, the total area conversion efficiency Reached 10.2%, effective area conversion efficiency reached 11.46%. When concentrating 2.73 times, the battery short-circuit current gain is 2.5 ~ 2.71 times. The development of solar cells that work under low light concentration has not been reported yet in China. Trial production of such batteries with polysilicon materials, it is possible to further reduce system costs, in the near future reached 20 ~ 25 yuan / peak watts.