Si-太阳能电池金属化模型银浆的流变性和丝网印刷性能
在该研究中表征了基于三种相应的载体制剂(V1-3)的三种模型银浆(M1-揗3)。所有载体均由相同的有机溶剂(四乙二醇二丁醚和一份萜品醇的混合物)，触变剂(Thixatrol Max)和有机粘合剂(乙基纤维素)制成。它们的Thixatrol Max(T-Max)和乙基纤维素(EC)粘合剂的浓度比不同，如表1所示。由于这些聚合物添加剂不具有表面活性[31]，并且它们的量仅在很小的范围内变化，可以安全地假设所有研究的模型系统的表面张力和润湿行为相似。载体组成的变化在商业银浆的典型范围内。
将二乙二醇二丁醚和萜品醇混合，并使用可调速分散机(DISPERMAT LC，VMA-Getzmann GmbH，Reichshof，Germany)在60±10℃下溶解EC粘合剂直至溶液变澄清。之后，使用相同的设备在70±10℃下溶解T-Max。
Rheology and Screen-Printing Performance of Model Silver Pastes for Metallization of Si-Solar Cells
2. Materials
Three model silver pastes (M1–M3) based on three corresponding vehicle formulations (V1–V3) were characterized in this study. All vehicles were made from the same organic solvent (a mixture of four parts diethylenglycoldibutylether and one part terpineol), thixotropic agent (Thixatrol Max),and organic binder (ethyl cellulose). They differed in their concentration ratio of Thixatrol Max (T-Max) and ethyl cellulose (EC) binder as shown in Table 1. Since these polymeric additives are not surface active [31] and their amount was varied only in a small range, we can safely assume that the surface tension and wetting behavior were similar for all investigated model systems. The changes in vehicle composition were in a range typical for commercial silver pastes.
Diethylenglycoldibutylether and terpineol were mixed and EC binder was dissolved using a tempered dissolver (DISPERMAT® LC, VMA-Getzmann GmbH, Reichshof, Germany) at 60±10℃until the solution became clear. After, T-Max was dissolved using the same equipment at 70±10℃.
