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高效率Ⅲ-Ⅴ族化合物太陽能電池之發展近況

Development of High Efficiency Ⅲ-Ⅴ Compound Semiconductors Solar Cell

摘要


太陽能電池之種類依其使用材料的不同大致上可分為矽、無機化合物、有機材料等三大類,光電轉換效率也因為材料的不同而有所差異。有機材料太陽能電池雖然可利用較便宜的成本與簡易的製程設備研製,但是在轉換效率上相對於矽基型太陽能電池仍有一段距離。矽基型太陽能電池雖然在製作過程相較於化合物半導體型太陽能電池較為成熟,但由於本身材料特性為非直接能隙半導體,導致在光轉換效率上會有所限制。因此,使用直接能隙的化合物半導體發展高效率太陽能電池將有其可行性,其中又以III-V族化合物半導體最有發展潛力,其能隙範圍將包含整個可見光波段。

並列摘要


Solar cells are classified into silicon, inorganic, organic solar cells according to materials, and the conversion efficiency is also different. Although the organic solar cells could be fabricated by simple equipments and with low cost, the conversion efficiency is not comparable with silicon based and compound solar cells. Moreover, although the fabrication of silicon based solar cells is mature than compound solar cells, the conversion efficiency is limited due to the material characteristics (indirect bandgap). Therefore, it is most practical to develop high efficiency solar cells by compound semiconductors.

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