Three primary color luminescence from natively and thermally oxidized nanocrystalline silicon
Three primary color luminescence from natively and thermally oxidized nanocrystalline silicon
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DOI：
10.1116/1.2172253
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发表时间：
2006-02
影响因子：
1.4
通讯作者：
Keisuke Sato;K. Hirakuri
中科院分区：
文献类型：
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作者：
Keisuke Sato;K. Hirakuri
利用光致发光和傅里叶变换红外光谱研究了氢氟酸溶液及氧化处理制备的纳米硅（nc-Si）的三基色发光。经HF处理的纳米硅在空气中表现出稳定而强的红色发光。当HF处理的nc-Si表面被自然和/或热处理氧化时，发光颜色从红色到蓝色连续变化。其原因是由于表面氧化引起的颗粒尺寸减小而使有效带隙能量增大。在空气中用肉眼可以清楚地观察到热氧化纳米硅的蓝色和绿色发光。这些结果表明，HF和后热氧化处理可以实现良好的稳定性和更高的三基色发光的nc-Si在空气中的亮度。
Three primary color luminescence from nanocrystalline silicon (nc-Si) prepared by hydrofluoric (HF) acid solution and subsequent oxidation treatments were studied using photoluminescence and Fourier transform infrared spectroscopy measurements. HF-treated nc-Si exhibited stable and strong red luminescence in the air. When the HF-treated nc-Si surface was oxidized by native and/or thermal treatment, the luminescence color varied continuously from red to blue. The reason is the enlargement of the effective band gap energy because of a reduced particle size caused by surface oxidation. The blue and green luminescence of thermally oxidized nc-Si could be distinctly seen in the air with the naked eye. These results suggest that the HF and post-thermal oxidation treatments can realize good stability and higher brightness in the air for three primary color luminescence from nc-Si.