采用离子束溅射技术,在玻璃衬底上制备了不同周期数的Si/Ge多层膜样品.利用X射线小角衍射、Raman散射光谱和室温光致发光(PL)对样品进行表征.结果表明,2.0~2.3eV之间的发光带是由薄膜中的各种缺陷形成的;1.77~1.84eV之间的发光带来自薄膜中的非晶结构和晶粒间的缺陷;1.53eV发光峰则可能源于纳米Ge晶粒发光.
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