文献类型：期刊文献

英文题名：Mechanism investigation on effects of glass composition on Ag/Si contact for crystalline silicon solar cells

作者：Zhang, Jiefeng[1];Sun, Xinjie[1];Tong, Hua[1];Yang, Yunxia[1];Yuan, Xiao[1];Li, Hongbo[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：32

期号：6

起止页码：6778

外文期刊名：JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

收录：;EI(收录号：20211010045381);WOS:【SCI-EXPANDED(收录号:WOS:000625049500005)】；

基金：This study was supported by National Key Research and Development Project (No. 2018YFB1500301).

语种：英文

外文关键词：Silicon solar cells - Erosion - Passivation - Silicon oxides - Zinc oxide - Bismuth compounds - Silver - Phase interfaces - Silica - Lithium compounds - Open circuit voltage - II-VI semiconductors - Sols

摘要：Pb-Te-Li oxide glasses have been widely applied in front silver (Ag) paste metallization of crystalline silicon (c-Si) solar cells. In practical application, some other important glass compositions, such Bi2O3, SiO2, ZnO and so on, are often added into Pb-Te-Li oxide glasses to improve the quality of Ag/Si contact. In this paper, the significant effects of these glass compositions on the Ag/Si contact are demonstrated by discussing their influences on the formation of Ag colloids in the interface, the erosion of glass to Si, the glass phase conductivity, and the glass passivation performance at the contact interface. The results show that the addition of Bi2O3 or SiO2 into the glass may reduce the Ag/Si contact resistivity, because Bi2O3 can promote the formation of Ag colloid in the interface glass layer and increase the interface glass phase conductivity, and SiO2 can weaken the erosion ability of the glass to keep relatively high dopant concentration in the contacted Si surface. The addition of ZnO into the glass may aggravate the erosion to Si and decrease the glass phase conductivity. It is inferred that increasing Bi2O3 and SiO2 or reducing ZnO can improve the glass passivation performance at the contact interface. Through the application in Ag paste metallization, the important effects of the glass compositions on the electrical properties of solar cells are shown that Bi2O3 and SiO2 in the glasses are helpful to increase the open-circuit voltage and short-circuit current, while ZnO is very useful for raising fill factor.