Optimization of Surface Reflectance for Alkaline Textured Monocrystalline Silicon Solar Cell
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چکیده
Surface texturization is well known as one of the major paths to improve the conversion efficiency of silicon solar cells by increasing the short-circuit current through the enhancement in antireflection property and effective photon trapping. Compared to the antireflection coating, it is more lasting and effective process. The anisotropic texturing of a (100) n-type monocrystalline silicon surface was performed using alkaline etching solution of potassium hydroxide (KOH) including isopropyl alcohol (IPA) additive. The reflection properties of alkaline-etched wafers were investigated using UV-VIS-NIR spectrophotometer and the images of the surface morphology were obtained using a scanning electron microscope (SEM). The influence of KOH/IPA concentration on etched wafers has been studied i.e. process variables considered were KOH & IPA concentration. An optimum value of surface reflectance has been achieved by exploring the better concentration of alkaline solution (KOH, IPA). Minimal reflectance of textured surface achieved was -0.83 % at wavelength of 800nm in the visible region. Keywords— Monocrystalline silicon; Solar cell; Texturization; Alkaline solution; Surface reflectance.
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Optimization of Surface Reflectance for Alkaline Textured Monocrystalline Silicon Solar Cell
Surface texturization is well known as one of the major paths to improve the conversion efficiency of silicon solar cells by increasing the short-circuit current through the enhancement in antireflection property and effective photon trapping. Compared to the antireflection coating, it is more lasting and effective process. The anisotropic texturing of a (100) n-type monocrystalline silicon sur...
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