Recently, Risen Energy has made substantial progress in Heterojunction (HJT) silicon-based perovskite tandem cell technology. Certified by authoritative institutions, the company’s 1 cm2 tandem cell has achieved a photoelectric conversion efficiency of 31.95%, with an open-circuit voltage of 1.988V.
This achievement is built upon the company’s long-term expertise in both HJT and perovskite technical routes. As one of the early pioneers in HJT industrialization, Risen Energy has mastered a comprehensive technical ecosystem, ranging from high-efficiency N-type HJT ground-based photovoltaic products to P-type HJT cells designed for the harsh environments of outer space.
In terms of specific processing, the Risen Energy R&D team introduced a water-bath immersion method and other advanced techniques to overcome the challenge of ensuring uniform perovskite layer coverage on the HJT cell’s pyramidal textured surface. This process generates a high-quality Self-Assembled Monolayer (SAM) on complex textured surfaces. This technology effectively improves charge transport and reduces defect density, successfully translating the advantages of the HJT bottom cell into a high-performance tandem device.
As the industry pursues higher conversion efficiencies, crystalline silicon-perovskite tandem cells have become the focal point of next-generation technology. Currently, this technical path is at a critical stage, transitioning from the laboratory toward gigawatt-level mass production, characterized by rapid technical iterations and efficiency breakthroughs.
Leading enterprises have already pushed laboratory tandem cell conversion efficiencies past the 34%–35% threshold. Trina Solar’s small-sized tandem cell efficiency has exceeded 35%; Tongwei Co., Ltd. and JinkoSolar have achieved efficiencies of 34.94% and 34.76%, respectively, for their perovskite-silicon tandem cells; meanwhile, LONGi Green Energy has refreshed its perovskite-silicon tandem cell efficiency record to 34.85%.
Overall, with the advancement of relevant process pathways, perovskite tandem technology is moving through a transition window from laboratory validation to mass-production feasibility. In the next phase, the focus of corporate competition will shift from efficiency records themselves toward critical factors such as large-area preparation consistency, long-term interface stability, and scaled cost control.
Source：EnergyTrend