25.62%! A New World Record for low indium and low silver HJT Cells Created by Maxwell

PVTIME – Recently, certified by the Institute for Solar Energy Research in Hamelin​(ISFH), an authoritative testing institution in Germany, Maxwell has achieved a photoelectric conversion efficiency of 25.62% on full-scale (M6 and 274.5cm²) monocrystalline heterojunction cell via using low indium content transparent conductive oxides (TCO) combined with silver plated copper grids, creating a new world record.

Maxwell stated that a considerable high efficiency for HJT solar cells in mass production and significant cost reduction can be ensured by this latest technology. Compared to previous case, the use of indium in single piece was reduced by 50% though the latest low indium content solution which adopts magnetron sputtering. Another 40% reduction can be reached as the indium decrease device added, which reduces the amount of indium to 30% of the current level. Meanwhile, the consumption of silver can be lowered by 55% though the silver plated copper grids. Therefore dramatically cutting back the manufacturing costs of heterojunction solar cells.  

The module technology laboratory of Maxwell can independently complete the manufacturing and electrical performance testing of high-efficiency heterojunction modules, which plays an important role in module reliability assessment and process optimization. The 144 half-chip M6 heterojunction cell modules developed by Maxwell’s module technology laboratory using this batch of cells have been tested internally, and the power is as high as 491.8W, which is 30W higher than that of PERC of the same size. The first-class standard cells are from TÜV Rheinland, Germany.