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效率高达26%,晶硅太阳能电池设计再突破 - 深圳太阳能板厂家/工厂,专注太阳能板生产15年-幻启科技(深圳)有限公司

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效率高达26%,晶硅太阳能电池设计再突破

幻启太阳能科技 10/18/2021

日前,位于德国的弗劳恩霍夫太阳能系统研究所,发现了省去用于提供横向载流子传输的前接触层是双侧接触式电池优异光电性能的关键,获得了高达26.0%的效率。实现了晶硅太阳能电池的重大突破,并认为这是晶硅太阳能电池的结构设计极限。

太阳能电池为n-p型电池,此后科学家发现在此基础上加上背面电场形成n-p结构的电池,可增加载流子的收集效率,改善电池性能。也就是BSF电池,成为光伏发展早期的主流电池技术。

但BSF电池背表面的金属铝膜层中的复合速度无法降至200cm/s以下,产生了较多的光电损失,因此转换效率上限不高。PERC技术则是在电池背面附上介质钝化层,可以较大程度减少光电损失,从而提升光伏电池1%左右的转换效率,因此成为了当下主流的电池技术。

本次弗劳恩霍夫太阳能系统研究所的发现,也是基于减少光电损失提高转换效率的理念,并有可能成为晶硅太阳能电池的结构设计极限。转换效率比目前效率的太阳能电池技术高于1%以上,相信会让很多科学家投入该技术路线的研究,共同致力于开发更加高效的太阳能电池。

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