【摘要】 利用大电流剥离方法制备了多孔硅薄膜层，测定了其吸收光谱。结果发现其吸收边对应于可见光区域，同单晶硅吸收光谱相比，其吸收边发生了蓝移，并且吸收强烈。这说明多孔硅的能带结构较硅发生了改变，表现为一种新的能带结构特征。更多还原

【Abstract】 Porous silicon(PS) film is obtained by high current attack in concentrated hydrofluoric acid solution. The experimental results of the optical absorption spectrum were analyzed,which show that the absorption edge of PS is on the visible region. The PS has a srtonger optical absorption and a blue shift of the absorption edge compared with the crystal silicon. The measurement and analysis of the optical absorptoin spectrum indicate the changing of the band structure of PS.更多还原