纳米硅颗粒在多孔氧化铝中的光致荧光特性

采用阳极氧化方法制备了多孔硅（Ps），经过超声波充分粉碎PS层得到分散的si纳米颗粒（n-Si），利用高速离心旋转方法将n-si镶嵌到多孔氧化铝（Al2O3）模板中，得到nSi／Al2O3。复合体系。研究了PS、分散的n-Si和n-Si／Al2O3。的荧光（PL）光谱性质，观察到n-Si极强的蓝紫光发射。结果表明，在Al2O3模板中的n-Si，比起PS和丙酮中的发光峰值波长向短波方向“蓝移”，而且半峰全宽（FWHM）也相对变窄。实验现象表明，量子限制效应（QCE）对样品的PL性质有苇要作用，并用QCE对样品的发光“蓝移”现象进行了解释。

The Photoluminescence Properties of Silicon Nanoparticles in Porous Alumina

Samples of porous silicon(PS) are fabricated by anodization with constantly current density,then dispersed into a colloid of Si nanoparticles(n-Si) by using supersonic.We select Al_2O_3 as a template to embed the n-Si with centrifugal force,the complex material of n-Si/Al_2O_3 can be obtained.Photoluminescent(PL) properties of PS,n-Si in acetone and in Al_2O_3 are studied systematically,and a ultrabright blue-purple photoluminescent band of n-Si can be observed.The experimental result of PL shows that there is a rather blueshift for the peak wavelength of n-Si in Al_2O_3 compared with the PS and n-Si in acetone.It has been suggested that the quantum confinement effect(QCE) may be suitably explained for the PL spectra of Al_2O_3 and n-Si.