晶体硅太阳能电池正面银浆的作用机制  

The action mechanism of front silver paste upon crystal silicon solar cells

作　　者：谭浩巍 谭富彬[3] 梁琦 陈亮维[1] 虞澜[1] TAN Hao-wei;TAN Fu-bing;LIANG Qi;CHEN Liang-wei;YU Lan(School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Shenzhen Fubang New Energy Materials Technology Co.Ltd.,Shenzhen 518000,Guangdong China;Kunming Institute of Precious Metals,Kunming 650106,China)

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]深圳富邦新能源材料科技有限公司,广东深圳518000 [3]昆明贵金属研究所,昆明650106

出　　处：《贵金属》2022年第1期91-95,共5页Precious Metals

摘　　要：正面银浆由银粉、玻璃成分和粘合剂等组成,根据硅光伏电池的电阻构成、正面银浆各组分的特性对烧结时银浆料与硅基体的物理化学变化进行了分析。正面银浆选用密度高的球形银粉,Pb-Te系玻璃,烧结后栅线有足够大的高宽比,增加线条横截面积,使细栅线体电阻(Rf)达到最小值;烧结时还原生成铅和碲单质及其化合物,与硅基体形成共晶导电夹层,使前接触电阻(Rfc)达到最小值;硅太阳能电池的串联电阻(Rs)变小了,光电转换效率就得到提高。The front silver paste consists of silver powder,glass composition and adhesive,etc.The physical and chemical changes between the silver paste and the silicon substrate during sintering were analyzed according to the resistance composition of the silicon photovoltaic cell and the characteristics of each component of the front silver paste.The front silver paste is made of high density spherical silver powder and Pb-Te glass.After sintering,the Grid line has a large enough height width ratio to increase the cross-section area of the lines,so that the fine grid wire resistance(Rf)can reach the minimum value.During sintering,lead and tellurium and their compounds are reduced,and forms an eutectic conductive interlayer with the silicon substrate to minimize the front contact resistance(Rfc).The series resistance(Rs)of the silicon solar cell becomes smaller,and its photoelectricity conversion efficiency is improved.

关 键 词：光伏电池 正面银浆料 电阻 光电转换 

分 类 号：TM914.4[电气工程—电力电子与电力传动]