Papers by Keyword: Alkaline Etchant

Abstract: Alkaline etchants was a conventional process in monocrystalline silicon texturing. In the paper, A new etchant,Sodium Dodecyl Sulfonate (CH3(CH2)10CH2SO3Na) solution, was firstly applied to texture monocrystalline silicon used for solar cells. Uniform pyramids about 2µm in the wafer of monocrystalline silicon were formed with low concentration of Sodium Dodecyl Sulfonate (CH3(CH2)10CH2SO3Na)at 75°C for 20min. This etchant has a lot of advantage, such as low cost, no pollution and good reproducibility, so maybe is suitable for the 1arge-scale production．

Abstract: Silicon solar cell surface texture was effective to reduce reflectance and improve light collection. Alkaline etchants was a conventional process in monocrystalline silicon texturing.However, isopropyl alcohol(IPA) as buffer solution was expensive and high consumption, which increased the cost of solar cell. In the paper, It has been found that a cheaper surfactant as buffer solution decrease silicon surface interfacial force and increase etchant infiltrating of silicon wafer, so a large number of very small and uniform texture appeared on the silicon surface. pyramids size of about 3µm formed after etching of 15min. A new process to reduce the production cost and form the high quality pyramids texturization has been developed by this investigation.