Porous Silicon

Porous Silicon : Solar Cell Applications

People involved
Aisha Gokce Ozbay, Ömer Altunay, Ahmet Coşkuner,  Gülşen Kösoğlu, Mehmet Yumak

The main aim in photovoltaic industry is to produce efficient and energy competitive solar cell modules at low cost. Efficient AntiReflection Coatings (ARC) improve light collection and thereby increase the current output of solar cells. Broadband ARCs are desirable for efficient application over the entire solar spectrum and porous silicon layers as antireflective coating layers provide successful light collection. In the study the most critical physical parameters of porous silicon are examined, homogeneous and uniform porous layers are produced. The photoluminescence spectrum and optical parameters of porous layers have been investigated, and we are now in the process of improving the efficiency of the device by modulating the structure of the porous silicon layers and studying its photovoltaic characteristics.

SEM pictures of P-Si samples prepared by strain etching and by electrochemical anodization are given in Fig.1 and Fig.2 respectively.


Fig.1 SEM picture of white light illuminated P-Si surface (side view)  Fig.2 SEM picture of white light illuminated P-Si surface (top view) Fig.3 SEM picture of white light illuminated P-Si surface (side view)