Longi achieves 30.1% efficiency in silicon-perovskite tandem solar cell
Longi, a Chinese solar PV manufacturer, has achieved a groundbreaking milestone by setting a new world record efficiency of 30.1 per cent for the commercial M6 size wafer-level silicon-perovskite tandem solar cell. This achievement was announced at the 2024 Intersolar Europe conference in Munich, Germany, marking a significant step towards the industrialisation of tandem PV technology.
The record-breaking feat, accomplished by the Longi Central R&D Institute team, was officially certified by the Fraunhofer Institute for Solar Energy (Fraunhofer ISE). Dr He Bo, the research and development director at the Institute, highlighted the team’s rapid progress in overcoming key challenges related to mass production technology for tandem solar cells within a short span of six months.
Longi emphasised that this new efficiency record provides a substantial advantage over their previous record of 27.3 per cent for silicon heterojunction back-contact (HBC) solar cells. The success of the tandem technology further solidifies Longi’s position as a frontrunner in crystalline silicon photovoltaics, holding efficiency records for both crystalline silicon solar cells and crystalline silicon-perovskite tandem solar cells.
It is worth noting that efficiency records in the solar industry vary, with distinctions between a solar cell efficiency record and that achieved for a commercial wafer-level cell. Longi’s recent accomplishment follows closely on the heels of their announcement of a world efficiency record of 34.6% for silicon-perovskite tandem solar cells.
This latest achievement also surpasses the previous world record of 28.6% wafer-level tandem solar cell efficiency on M4 commercial size wafers set in May 2023, showcasing an absolute efficiency advantage of 1.5%.
