晶体硅太阳电池烧结工艺优化

Sintering Processes Optimization of Crystalline Silicon Solar Cell

金属电极与硅的接触电阻是影响太阳电池填充因子和短路电流进而影响光电转换效率的重要因素之一。首先对晶体硅太阳电池的烧结工艺进行了优化,利用平台式烧结温度曲线代替陡坡式烧结温度曲线。然后,采用Core Scan方法测试工艺优化前后晶体硅太阳电池丝网印刷烧结银电极与硅之间的接触电阻Rc,并测试了工艺优化前后电池片的IV特性。数据显示烧结工艺优化后可减小银电极与硅的接触电阻,从而提高了太阳电池的光电转化效率。平台式烧结温度曲线更适用浅结高方阻的电池结构。

The contact resistance between a metal electrode and silicon is one of the important factors which influence solar cell fill factor, short circuit current and electro-optic conversion efficiency. By optimizing the sin- tering technique of crystal silicon solar cell, the platform-based sintering temperature curve with steep is replaced by the sintering temperature curve. The Core Scan method is used to test the contact resistance P~ between sinter- ing silver electrode of crystal silicon solar cell and silicon before and after technique optimizing process. And IV characteristic battery plate is tested before and after technique optimizing process. The test results show that the optimized sintering technique can reduce the contact resistance between silver electrode and silicon. So elec- tro-optic conversion efficiency of solar cell is improved. The platform-based sintering temperature curve is much more suitable for high efficiency shallow junction silicon cell structure.