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How Seraphim is planning for solar’s ‘post-PERC’ phase

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Polaris Li, president at Seraphim. Image: PV Tech.

As more traditional PERC cells and modules reach their limitations, Seraphim president Polaris Li discusses his company’s strategy for what he dubs the ‘post-PERC’ era of solar PV.

Li says that while improvements will continue to be made to PERC cells, with materials and other technologies used to take efficiencies to 23.2% or higher, it is reaching its natural top-end, leading module manufacturers to adopt n-type technologies.

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Li adds that Tunnel Oxide Passivated Contact (TOPCon) technologies will be the first to be adopted given that these are easier to add to existing PERC lines, followed in two to three years by heterojunction, however the industry must still find solutions to issues affecting materials, equipment and processes for HJT.

13 October 2026
San Francisco Bay Area, USA
PV Tech has been running an annual PV CellTech Conference since 2016. PV CellTech USA, on 13-14 October 2026 is our fourth PV CellTech conference dedicated to solar manufacturing in the USA. From polysilicon, wafers, ingots, cells and modules, to critical component suppliers including glass and frames, the event connects every stage of the value chain under one roof. PV CellTech USA also brings together investors, innovators, manufacturers and industry stakeholders to collaborate and strengthen domestic solar manufacturing across the United States.

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