Photoluminescence from Si nanocrystals embedded in a CaF₂ dielectric matrix and formed on the surface of a Si(111) substrate is demonstrated. The photoluminescence was clearly seen in a dark room at room temperature. The typical photoluminescence spectrum has a 664 nm peak wavelength and a 134 nm full width at half maximum (FWHM). The photoluminescence was not observed at a lower temperature (77 K).

中文翻译：

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(Si + CaF2)/CaF2 结构中纳米晶硅在光谱可见范围内的发光

展示了嵌入 CaF ₂介电基质中并在 Si(111) 衬底表面上形成的Si 纳米晶体的光致发光。在室温下在暗室中清楚地看到光致发光。典型的光致发光光谱具有 664 nm 峰值波长和 134 nm 半峰全宽 (FWHM)。在较低温度 (77 K) 下未观察到光致发光。