It was recently reported that solar manufacturer Tongwei Solar has announced that its Global Innovation R&D Center has produced the first cell at its fully automated MW-scale perovskite-silicon tandem cell pilot line.
Established in 2022, the lab adopts a process route compatible with existing heterojunction (HJT) production lines, focusing on key processes such as tandem cell structure design, high-quality conformal film deposition, interface passivation, low-temperature metallization, and module encapsulation. The lab claims to have already achieved an R&D cell efficiency of 34.78%, while 210 half-cut full-size cells (full area) reached an efficiency of 28.39%. Tongwei stated that the completion of the pilot line is a milestone in the transition of its tandem cell technology from the lab toward industrialization.
In August, Tongwei announced that its perovskite R&D team achieved a 31.58% conversion efficiency (31.4% certified) for tandem cells based on commercial silicon.
