Si-太(tài)陽能電池(chí)金屬化(huà)模型銀(yín)漿(jiāng)的流變性(xìng)和(hé)絲網印刷性(xìng)能

在該(gāi)研究(jiū)中(zhōng)表征(zhēng)了基於三種相應的載體製(zhì)劑(jì)(V1-3)的(dí)三種模(mó)型銀漿(jiāng)(M1-揗3)。所有載(zǎi)體均(jūn)由(yóu)相同的有機溶劑(四乙二(èr)醇二丁(dīng)醚和一份(fèn)萜品(pǐn)醇(chún)的(dí)混(hùn)合物(wù))，觸變劑(Thixatrol Max)和(hé)有(yǒu)機粘(nián)合(hé)劑(jì)(乙(yǐ)基纖維(wéi)素(sù))製(zhì)成。它們的(dí)Thixatrol Max(T-Max)和(hé)乙(yǐ)基纖(xiān)維素(sù)(EC)粘合劑的(dí)濃度比(bǐ)不(bù)同(tóng)，如表(biǎo)1所(suǒ)示(shì)。由(yóu)於這些(xiē)聚合物添加劑不(bù)具有表(biǎo)麵活(huó)性(xìng)[31]，並(bìng)且它(tā)們的量(liáng)僅在很小(xiǎo)的範圍(wéi)內變(biàn)化，可(kě)以(yǐ)安全地(dì)假設(shè)所有(yǒu)研(yán)究的模型係(xì)統的表麵張(zhāng)力和潤(rùn)濕(shī)行為(wéi)相(xiāng)似。載(zǎi)體組(zǔ)成的變化在商業(yè)銀(yín)漿的典(diǎn)型範(fàn)圍(wéi)內。

將二(èr)乙二醇二(èr)丁醚(mí)和(hé)萜(tiē)品醇(chún)混合，並使用(yòng)可(kě)調(tiáo)速分散(sàn)機(DISPERMAT LC，VMA-Getzmann GmbH，Reichshof，Germany)在60±10℃下溶解EC粘(nián)合(hé)劑直至溶(róng)液變(biàn)澄清。之(zhī)後，使用(yòng)相同的(dí)設備(bèi)在70±10℃下溶解(jiě)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℃.