New metallization paste range from Heraeus

• The SOL 7 series consists of 5 products for Perc, Topcon and heterojunction tools.

German silver metallization paste maker Heraeus has actually released a range of products aimed at the manufacture of high-efficiency solar cells.

The SOL 7 Series consists of five silver pastes meant for PV innovations consisting of mono and also multicrystalline Perc cells, Topcon and heterojunction gadgets.

The SOL9671B product is meant for the production of ultra-lightly-doped emitter (ULDE) and passivated-emitter rear-contact (Perc) cells. The supplier said the paste is based on glass chemistry upgraded from the previous generation of items to offer remarkable metallization get in touch with and a natural vehicle system for ultra-fine-line (UFL) printing. Heraeus claims the paste has a broad firing window toward a reduced temperature side which is especially suitable for Perc gadgets.

The SOL6700 dual-printing busbar paste is made with a chemistry which can use a controlled response between paste as well as dielectric layer, increasing protection of the latter throughout metallization, according to Heraeus. The supplier said the enhanced security supplied by the item lowers electron recombination while raising open-circuit voltage. The SOL6700, states Heraeus, is compatible with cell innovations consisting of Perc, double passivation and also n-type tools. "This paste gives superb bond and also a large soldering window," the supplier stated.

Resistivity

The third paste-- SOL9390A-- is stated to be compatible with dual and dual printing and to provide better get in touch with resistivity for p+ emitter in n-type cells. Contrasted to Heraeus' previous pastes for n-type modern technology, the product is said to offer enhanced printability as well as line uniformity.

The SOL7300 paste is used for the manufacturing of Perc cells with Topcon technology. "Excellent contact resistivity is accomplished even when fired at lower temperature levels, as well as sustains [an] ultra-thin poly layer," said Heraeus. The producer asserts the paste allows lower shooting temperatures, to lower the influence of metal-induced recombination and also maintain high cell open-circuit voltage while supplying superb contact resistance.

The SOL590 is an item developed for the manufacture of heterojunction (HJT) cells. It reveals strong call resistivity as well as distinct low treating temperature, according to its producer. "The Heraeus SOL590 has actually been developed based upon our recent improvement in low-curing-temperature paste chemistry, integrated with the most up to date innovation in silver powder advancement as well as organic style, [it provides] faster cure times, higher efficiencies as well as greater bond than commercially available products," the firm said.

Heraeus Photovoltaics head of state Wen Zhou claimed: "Cell manufacturers continue to search for new ways to provide greater Perc efficiencies and also enhance component reliability. The latest additions to the SOL 7 Series paste portfolio are developed to help them attain that."