利用热蒸发设备在30 mm×30 mm的单晶硅PERC太阳电池背表面蒸镀约2μm厚的纯铝电极,采用工业链式烧结炉对该背电极进行烧结,发现当烧结峰值温度913.8℃及铝硅固溶时间13s左右时电池效率最大.进而,以硅片厚度和背电极材料为变量,设置4组(100 μm背铝浆、100 μm背纯铝、170 μm背铝浆、170 μm背纯铝)156mm×156mm单晶硅PERC电池,利用各背电极材料相应优化温度场进行烧结,发现170 μm纯铝背电极电池效率最高达16.42％,平均效率相对于同厚度背铝浆电池高0.37％,且100 μm纯铝背电极电池翘曲度可忽略,因而认为纯铝电极相较于铝浆电极有利于提升电池效率以及能够有效降低大面积薄电池的翘曲程度.
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