单晶硅太阳电池两步制绒工艺的研究  

STUDY ON TWO-STEP TEXTURING PROCESS OF MONOCRYSTALLINE SILICON SOLAR CELLS

作　　者：彭平 夏中高 景彦姣 高继龙 王文静[2] 周春兰[2] Peng Ping;Xia Zhonggao;Jing Yanjiao;Gao Jilong;Wang Wenjing;Zhou Chunlan(Pingmei Longji New Energy Technology Co.,Ltd.,Xuchang 461700,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]平煤隆基新能源科技有限公司,许昌461700 [2]中国科学院电工研究所,北京100190

出　　处：《太阳能学报》2023年第8期208-214,共7页Acta Energiae Solaris Sinica

基　　金：河南省中国科学院科技成果转移转化项目(2020108)。

摘　　要：为了减少单晶硅太阳电池的光学损失,需在硅片表面制备大小合适且分布均匀致密的金字塔结构。基于此目的,在一步制绒基础上开发出两步制绒工艺,即原硅片依次经过两个化学溶液配比不同、反应时间不同的制绒槽。第1个槽药液浓度较高,化学反应速率较快,金字塔能够快速成核生长;第2个槽药液浓度较低,化学反应速率较慢,从而获得结构独立且均匀性较好的金字塔。实验表明:第1个槽的最佳反应时间在250~300 s,第2个槽的最佳反应时间在100~130 s。相对于一步制绒工艺,两步制绒工艺形成的硅片表面反射率降低0.5%,增加了表面对光的吸收,可使太阳电池获得更高的光电转换效率。In order to reduce optical losses in monocrystalline silicon solar cells,it is necessary to obtain a uniform and dense pyramidal structure on the surface of the crystalline silicon.A two-step texturing process has been developed for this purpose,whereby the wafers are sequentially passed through two texturing tanks with different chemical solution ratios and different reaction times.The first tank has a higher concentration of the chemical solution and a faster reaction rate,resulting in fast nucleation of the pyramids;the second tank has a lower concentration of the chemical solution and a slower reaction rate,resulting in structurally independent and homogeneous pyramids.Experiments show that the optimum reaction time is 250-300 s for the first step texturing and 100-130 s for the second step texturing,and that the surface reflectivity of the wafers formed by the two-step texturing is reduced by 0.5%compared to the one-step texturing,which increases the absorption of light by the wafer and enables the solar cell to achieve higher photoelectric conversion efficiency.

关 键 词：太阳电池 制绒 反射率 电性能参数 量化表征 量子效率 

分 类 号：TM914.41[电气工程—电力电子与电力传动]