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n型铝背结太阳电池的前面场优化研究

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摘要 主要研究了n型铝背结太阳电池前面场对电池效率的影响,前面场浓度与扩散深度的优化明显提高了n型电池的短波响应,在实验中采用了低成本工艺路线,采用PECVD沉积SiN x替代高温热氧化形成的SiO2与PECVD沉积SiN x叠层膜作为钝化减反射层。文中通过PC1D模拟与实验结合的方法得到前表面场的最佳掺杂浓度与掺杂深度,研究发现n型电池前面场与p型电池背面场有明显差异,p型电池背面场掺杂浓度越高得到的效率就越高,而n型电池前面场掺杂浓度在合适范围内才能有效提高电池效率。最终经过优化得到的电池效率达到19.25%,开路电压为641 mV,短路电流为8.91 A,填充因子为80.53%。
出处 《太阳能》 2014年第2期42-45,共4页 Solar Energy
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