New PERC Metallization Paste from Monocrystal

Monocrystal’s Rear Tabbing Paste for PERC Cells Comes with Lower Silver Loading And Supports Low Laydown
Monocrystal has introduced new rear tabbing metallization pastes for PERC cells. In combination with its local BSF aluminum paste it helps to increase the efficiency of PERC cells by 0.18%, the company says.  (photo credit: Monocrystal)
Monocrystal has introduced new rear tabbing metallization pastes for PERC cells. In combination with its local BSF aluminum paste it helps to increase the efficiency of PERC cells by 0.18%, the company says. (photo credit: Monocrystal)
  • Monocrystal introduced a new rear tabbing metallization pastes for PERC cells
  • The MY-555 has 55% silver loading and reduces the paste consumption by 6%
  • The new paste displays 50% higher adhesion over the previous model
  • The new product is compatible with Monocrystal's local BSF aluminum paste and the combination is said to facilitate in an efficiency gain of 0.18%

Metallization paste maker Monocrystal has introduced a new rear tabbing silver paste called MY-555, which is specially designed for PERC cell architecture. The silver composite taking the shape of rear busbars on PERC cells and features several advancements over the earlier model MY-355. According to Monocrystal, the new MY-555 has low silver loading of 55% and paste consumption is reduced by 6% compared to MY-355, which means a 10 to 15% reduction in costs of ownership in the rear tabbing step of PERC processing.

The important characteristics of a rear tabbing paste for PERC cells are two-fold – not to penetrate through the rear passivation stack, while at the same time exhibiting good adhesion to solar ribbons in module making. MY-555 fulfills both these requirements. In fact, according to Monocrystal, the new paste has a 50% higher adhesion of 1.8 to 2.5 N/mm compared to the earlier model.

Another prerequisite for such a rear tabbing paste is to be compatible with local BSF aluminum pastes. Monocrystal says that the MY-555 paste is "perfectly" compatible with its EFX-series aluminum paste promoted for the application. The combination, referred as package of pastes for PERC, has the potential for an absolute efficiency gain of 0.18%, the company says.

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