Development of Multitextures on the Basis of Porous Silicon for High Performance Photoelectric Converters

The conversion efficiency of solar energy can be significantly increased if silicon of a multiporous texture is used as the front surface of a solar cell. The possibility to create the porous silicon multitexture as a basic material for fabrication of efficient photoelectric converters is shown. As a result of electrochemical etching, the columnar porous silicon texture was fabricated in terms to obtain a low-reflection structure. The reflection of prepared frontal texure based on columnar porous texure exhibited lower values in comarison to random pyramid texture in the wavelength range 400-1150 nm. It was demonstrated higher photovoltaic performances of test photoelectric converters with a columnar porous silicon texture in comparison to those with pyramidal textures.