Si-太陽能電池金屬化模型銀漿的流變性和絲網(wǎng)印刷性能
在該研究中表征了基于三種相應(yīng)的載體制劑(V1-3)的三種模型銀漿(M1-揗3)。所有載體均由相同的有機溶劑(四乙二醇二丁醚和一份萜品醇的混合物)，觸變劑(Thixatrol Max)和有機粘合劑(乙基纖維素)制成。它們的Thixatrol Max(T-Max)和乙基纖維素(EC)粘合劑的濃度比不同，如表1所示。由于這些聚合物添加劑不具有表面活性[31]，并且它們的量僅在很小的范圍內(nèi)變化，可以安全地假設(shè)所有研究的模型系統(tǒng)的表面張力和潤濕行為相似。載體組成的變化在商業(yè)銀漿的典型范圍內(nèi)。
將二乙二醇二丁醚和萜品醇混合，并使用可調(diào)速分散機(DISPERMAT LC，VMA-Getzmann GmbH，Reichshof，Germany)在60±10℃下溶解EC粘合劑直至溶液變澄清。之后，使用相同的設(shè)備在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℃.
