Compared with crystal silicon, porous silicon has a stronger optical absorption and blue shift has taken place at its absorption edge.

同单晶硅相比，其吸收边发生了蓝移，并且吸收强烈。

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The optical transmittance of al doped AZO is as high as 85% in the visible region, the UV absorption edge is blue shifted greatly with increasing al doping concentration.

AZO透明导电材料的光学透过率在可见光范围内高达85%，紫外吸收限随着掺杂浓度的增加而发生蓝移。

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