China based Suzhou Maxwell Technologies Co., Ltd, has reported a 32.5% certified photoelectric conversion efficiency for its perovskite/silicon heterojunction tandem solar cell. The result is independently validated by Fraunhofer Institute for Solar Energy Systems (Fraunhofer ISE), Germany. The tandem device was fabricated on an industrial-grade 110 μm silicon wafer using Maxwell’s mass-producible manufacturing equipment and processes. The company stated that the cell design combines advanced tandem technology with production-ready industrial processes. Efficiency improvements were achieved through perovskite interface passivation optimization and the development of low-damage transparent conductive oxide (TCO) materials and associated process steps. The company reported that the new result represents an improvement from 32.38% to 32.5% within two months.