LONGi revealed its latest efficiency breakthrough for crystalline silicon-perovskite tandem solar cells at the 2026 Solar and Energy Storage Innovation Conference. The company’s independently developed technology achieved a conversion efficiency of 35.5%, certified by the European Solar Test Installation, establishing a new world record in the field.
Tandem solar cells combining crystalline silicon and perovskite materials represent a leading technology pathway for achieving ultra-high efficiency in next-generation solar power generation. The theoretical efficiency ceiling for this approach reaches approximately 43%, substantially surpassing the 33.7% Shockley-Queisser limit applicable to conventional single-junction cells. LONGi’s development trajectory demonstrates rapid advancement, with the company reaching 33.9% efficiency in November 2023, followed by 34.6% in June 2024, and subsequently achieving multiple incremental improvements over the following months.
Beyond laboratory settings, LONGi demonstrated the scalability potential of its tandem technology through testing at dimensions closer to industrial production scales. The company achieved conversion efficiencies of 34.3% across a 261 square centimeter cell and 32.2% across a 274 square centimeter cell. Additionally, LONGi’s tandem modules produced conversion efficiencies of 31.4% and 29.4%, with both results independently verified by international testing institutions and included in official efficiency rankings.
LONGi’s performance metrics reflect its strategic approach to advancing clean energy technologies. The company operates a tiered research framework designed to maintain continuous innovation across different development stages, with parallel efforts dedicated to commercial production, near-term development initiatives, and longer-term technology reserves. The organization intends to continue prioritizing technological advancement while working to transition crystalline silicon-perovskite tandem technology from research environments toward wider industrial implementation.