助焊剂对返修TOPCon太阳电池EL图像脏污影响的研究OA

To explore the reasons for the dirtiness of EL images after solar cell repair,this paper takes the finished TOPCon solar cell as an example.By artificially applying flux produced by different manufacturers on the main grid of the solar cell,the effects of the acidity,volatility,and different silver paste formulations of the flux on the EL images of the solar cell are analyzed.The analysis results show that:1)There is no positive correlation between the acidity and alkalinity of the flux and its corrosion degree on solar cells.The longer the time,the more corrosive flux becomes to the solar cell.2)The volatilization rate of flux is negatively correlated with the degree of corrosion of solar cells,and the faster the volatilization rate,the smaller the degree of corrosion.3)The more flux is applied,the greater the impact on the front of the solar cell.There are differences in the sensitivity of different silver paste formulations to flux.The corrosion resistance of the silver paste can be improved by optimizing the silver paste formulation by selecting appropriate glass bodies and lead content,thereby reducing the harm of flux to solar cells.In order to provide reference for the selection of flux and silver paste based on the research results.