摘要
从废弃的太阳能电池片中回收多晶硅原材料对于环境保护和材料的循环再利用具有重要意义。本文研究了用化学溶解和超声清洗回收电池片的最佳条件。分别对实验样品进行EDS、SEM、XPS分析,得出结论:电池片与质量分数为10%的氢氧化钠溶液反应18 min完全去除铝电极,且硅晶片的损失率较小;将完全去除铝电极的电池片在40 kHz超声清洗20 min后银电极完全剥落;电池片与40%氢氟酸溶液反应10 min可以去除氮化硅膜。本研究对质量为8.9068 g的单片电池片进行了定量分析,除去的铝电极质量为1.1102 g,回收得到了0.0766 g的银电极和7.7169 g的硅晶片。
Recovering Si material from the degraded solar cells is significant for environmental protection and material recycling. In this tudy, the optimal conditions for recycling degraded solar cells by chemical etching and ultrasonic cleaning were investigated. The samples were tested by EDS, SEM and XPS, The results showed that Al electrodes were completely removed from cells by reaction with 10 wt% Na OH solution for 18 min, with less silicon corrosion lost. After that, Ag electrodes were completely exfoliated from the cells by ultrasonic cleaning（40 kHz） for 20 min. Si3 N4 film was thoroughly eliminated after the cells were etched with 40 wt% HF solution for 10 min, which was proved to be the optimal reaction time. A quantitative experiment was performed in this study with 8. 9068 g cells. The results show that the recycling mass of Al electrodes, Ag electrodes and Si wafers are 1.1102 g, 0.0766 g and 7.7169 g, respectively.
作者
李佳艳
蔡敏
武晓玮
谭毅
LI Jia-Yan;CAI Min;WU Xiao-Wei;TAN Yi(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China;Key Laboratory for Solar Energy Photovoltaic System of Liaoning Province,Dalian 116024,China)
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2018年第9期987-992,共6页
Journal of Inorganic Materials
基金
国家自然科学基金(51574057)~~
关键词
多晶硅
太阳能电池片
回收
polycrystalline silicon
solar cells
recycle
