Post‐anodization filtered illumination of porous silicon in HF solutions: An effective method to improve luminescence properties
Post‐anodization filtered illumination of porous silicon in HF solutions: An effective method to improve luminescence properties
复制标题
HF溶液中多孔硅的阳极氧化后过滤照明：提高发光性能的有效方法
DOI：
10.1063/1.112946
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
N. Koshida
中科院分区：
文献类型：
--
作者：
H. Koyama;T. Nakagawa;T. Ozaki;N. Koshida
提出了一种基于阳极氧化后样品在HF溶液中发光的有效方法来提高多孔硅的发光效率。在本方法中，照明由白色灯通过锐切长波长通滤波器来执行，以从照明光中去除短波长分量。用这种方法制备的PS样品显示出可见光致发光（PL）的效率比没有滤光片的样品高一个数量级。效率的提高归因于减少了PS中Si微晶的劣化表面氧化。滤波照明技术也可用于产生较大的PL蓝移和PL光谱的精确控制。
A useful method is presented to improve the luminescence efficiency of porous silicon (PS) based on the post‐anodization illumination of samples in HF solutions. In the present method the illumination is performed by a white lamp through sharp‐cut long‐wavelength‐pass filters to remove the short wavelength component from the illumination light. The PS samples prepared by this method exhibited the visible photoluminescence (PL) with an efficiency of one order of magnitude higher than those illuminated without filters. The efficiency improvement is attributed to the reduction of the deteriorative surface oxidation of Si crystallites in PS. The filtered illumination technique is also useful to produce a larger PL blue shift and precise control of PL spectra.