A New Attempt at Alkaline Texturization of Monocrystaline Silicon with Anionic Surfactant as the Additive

Owing to the volatilization of isopropanol (IPA), instability in the alkaline texturization of monocrystalline silicon has been a big problem for a long time. Many additives were adapted to replace IPA, such as high boiling point alcohols. In this experiment, as a new attempt, sodium lauryl sulfate (SDS), a type of anionic surfactant, was used as the additive in NaOH solution. The etching properties of silicon in 2 wt % NaOH/15–30 mg/L SDS solution were analyzed. To improve the wettability of silicon, two types of metal salt, NaCl and Na 2 CO 3 with concentration from 2 to 15 wt %, were applied to the 2 wt % NaOH/15 mg/L SDS solution. The results showed that the effect of NaCl was better than that of Na 2 CO 3 . Finally, the role of the additive was discussed.