多晶硅是目前最主要的光伏材料,其结晶组织、缺陷和杂质含量显著影响太阳能电池的转换效率.通过控制硅锭定向凝固过程获得取向一致、粗大均一的结晶组织和采用各种吸杂及钝化方法降低杂质及缺陷对电学性能的影响是目前提高多晶硅太阳能电池转换效率的重要途径.介绍和评述了国内外包括本研究组对多晶硅的结晶组织及控制、晶体缺陷、杂质水平与分布及其与硅片性能关系的研究进展,并对当前的各种吸杂与钝化方法及其效果进行了总结.
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