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Cu(In,Al)Se_2薄膜太阳电池

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摘要 Cu(In,Al)Se2(CIAS)化合物薄膜太阳电池属于Ⅰ-Ⅲ-Ⅵ2族化合物薄膜太阳电池,由同族的Al来替代CuInSe2(CIS)中的In,及Cu(In,Ga)Se2(CIGS)中的Ga和In。具有黄铜矿结构的Ⅰ-Ⅲ-Ⅵ2族化合物半导体材料可作为吸收层用于光伏电池。用渗入CIS中得到具有黄铜矿结构的CIGS,并且可根据Ga/(In+Ga)调节禁带宽度提高转化效率,但Ga的掺入调节禁带宽有限。以Al替代Ga,不仅可大幅降低成本,同时由于形成CuAlSe2相的能隙为2.7eV,因此调节Al/(In+Al)的比例可更宽泛地调节Cu(In,Al)Se2(CIAS)能禁带宽度。目前CIAS制备工艺以真空镀膜方法为主,包括真空蒸镀、磁控溅射、脉冲激光等。在非真空方法中,研究者们尝试了电沉积的方法成功制得单相的CIAS吸收层薄膜,而用如丝网印刷等低成本工艺CIAS薄膜尝试还少见报导。本文详细介绍了CIAS制备方法及工艺,并提出CIAS研究的一些建议。
出处 《太阳能》 2013年第19期46-49,57,共5页 Solar Energy
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