Record HJT solar cells with efficiencies over 24%

March 13, 2019 //By Nick Flaherty
Record HJT solar cells with efficiencies over 24%
Swiss solar panel maker Meyer Burger is demonstrating Heterojunction (HJT) cell technology that could be a breakthrough technology for multi-gigawatt mass production in 2019.

With its focus on the development of industrialized high efficiency Heterojunction manufacturing solutions, Meyer Burger has already achieved HJT cells with recent record efficiencies of over 24.2% on its standardized HJT equipment. A technology roadmap for HJT cells with efficiencies towards 25% is already in place, and CTO, Dr Gunter Erfurt, has been updating Meyer Burger’s SWCT cell connection technology which has already been used in 1GW of modules.

Dr Erfurt is also focussing on passivated contact solar cells (also known as TOPCon or monoPoly®) and what is required for this technology to become a mainstream offering in the PV industry. Today the prevailing mainstream technology in the photovoltaic market is PERC (Passivated Emitter Rear Contact) cell coating technology. Current PERC solar cells achieve efficiency levels of between 21% and 22% but there are significant technology limitations, which affect the potential for further increases in PERC cell efficiency. Passivated contact technology can offer an evolutionary upgrade to existing PERC mass production capacities, taking them to efficiency levels around 23%.

For the past two years, Meyer Burger has been developing a platform for the industrialized manufacture of solar cells with passivated contact technology for both n- and p-type wafers. In trials with customers, the CAiA platform has already produced cells with efficiencies slightly above 23% and the first lab machine has already been sold to a strategic customer and technology partner, with initial installations planned by midyear. The CAiA complements Meyer Burger’s MAiA and FABiA cell coating portfolio with both current as well as new customers for the manufacture of passivated contact cells. Meyer Burger’s SWCT module technology works not only for HJT modules but also for the most cost-effective production of solar modules with passivated contact cells

He also points out that the technology is not covered by a recent patent infringement claim by Hanwha Q Cells.

Recently solar module manufacturer Hanwha submitted the patent infringement claim against several Asian solar module producers for the use of Atomic Layer Deposition (ALD) passivation


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