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Online Process Control of Alkaline Texturing Baths: Determination of the Chemical Concentrations

机译:碱性变形浴的在线过程控制:化学浓度的确定

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Almost every monocrystalline silicon solar cell design includes a wet chemical process step for the alkaline texturing of the wafer surface in order to reduce the reflection of the front side. The alkaline texturing solution contains hydroxide, an organic additive usually 2-propanol and as a reaction product silicate. The hydroxide is consumed due to the reaction whereas 2-propanol evaporates during the process. Therefore, the correct replenishment for both components is required in order to achieve constant processing conditions. This may be simplified by using analytical methods for controlling the main components of the alkaline bath. This study gives an overview for a successful analytical method of the main components of an alkaline texturing bath by titration, HPLC, surface tension and NIR spectrometry.
机译:几乎每个单晶硅太阳能电池设计都包括湿法化学处理步骤,用于对晶片表面进行碱化处理,以减少正面的反射。碱性纹理化溶液包含氢氧化物,通常为2-丙醇的有机添加剂以及作为反应产物的硅酸盐。由于该反应,氢氧化物被消耗,而2-丙醇在该过程中蒸发。因此,为了实现恒定的加工条件,需要为两个组件正确补货。这可以通过使用分析方法控制碱浴的主要成分来简化。这项研究概述了通过滴定,HPLC,表面张力和NIR光谱法成功分析碱性变形浴主要成分的方法。

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