方石英籽晶辅助生长高效多晶硅的研究  

Cristobalite-seeded growth of high performance multicrystalline silicon ingot

作　　者：余云洋 丁君京 陈文亮 张兆玉 钟根香 黄新明[1,3] YU Yunyang;DING Junjing;CHEN Wenliang;ZHANG Zhaoyu;ZHONG Genxiang;HUANG Xinming(College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China;Donghai JA Solar Technology Co.Ltd.,Lianyungang 222300,China;JA Solar Holdings Co.Ltd.,Beijing 100160,China)

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]东海晶澳太阳能科技有限公司,江苏连云港222300 [3]晶澳太阳能控股有限公司,北京100160

出　　处：《南京工业大学学报（自然科学版）》2018年第2期59-64,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家重点基础研究发展计划(973计划)(2009CB623100);江苏省普通高校研究生科研创新计划(CXZZ11_0326)

摘　　要：以熔融石英颗粒作为籽晶的全熔法铸锭工艺已成为当前高效多晶硅的重要生产方法。但由于熔融石英为异质籽晶且为无定形结构,因而其引晶效果并不理想。采用方石英籽晶代替生产所用的熔融石英籽晶辅助高效多晶硅的初期形核及晶粒生长。结果显示:硅锭底部的初始晶粒得到明显细化,其平均粒径缩小约15.7%,且晶粒尺寸更加均匀,位错密度较熔融石英铸锭降低了21.5%,相应电池片的平均转化效率绝对提升近0.1%。Fused quartz particles have been widely used as heterogeneous seeds to assist the growth of high performance multicrystalline silicon(HP mc-Si)ingot in industry.However,the crystal quality is not ideal because of the heterogeneous and amorphous structure of the fused quartz seeds.Cristobalite particles instead of fused quartz seeds was used to assist nucleation and grain growth of the HP mc-Si ingot.Results showed that the initial grain size of the cristobalite seeded ingot was obviously refined.The average grain size decreased by 15.7%,and the size was more uniform.The dislocation density reduced by 21.5%in comparison with fused quartz seeded ingot,and the average conversion efficiency of the solar cells increased about 0.1%in absolute value.

关 键 词：异质引晶 方石英 晶粒尺寸 位错密度 电池效率 

分 类 号：TM914.4[电气工程—电力电子与电力传动]