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Perovskite–silicon tandem solar cells using zinc-doped tin oxide achieve comparable performance to indium tin oxide counterparts
Fraunhofer ISE-led researchers demonstrated zinc-doped tin oxide (ZTO) as an indium-free alternative to indium tin oxide (ITO) for recombination layers in fully textured perovskite–silicon tandem solar cells. ZTO delivers comparable device efficiencies of 27–28% under current-matching conditions, offering a scalable, indium-free pathway for high-performance tandem photovoltaics without efficiency loss.
Apr 20, 2026
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Indian researchers build transparent perovskite-silicon tandem solar cell with 30.2% efficiency
The transparent four-terminal perovskite solar cell employs an ion-modulated spiro-MeOTAD hole transport layer, which passivates interfacial defects, enhances carrier dynamics, and allows for a tunable work function in wide-bandgap perovskites. When integrated into mechanically stacked 4T tandems with an n-TOPCon cell, the device achieved an overall efficiency of 28.4–30.2%, along with improved open-circuit voltage and fill factor.
Chinese scientists build 31.13%-efficient perovskite-silicon tandem solar cell via 2D seeding agent
Researchers in China developed a novel two dimensional (2D) seeding agent to regulate crystallization in a 1.80-eV wide-bandgap perovskite film. A perovskite-silicon tandem device made with the resulting optimized subcell achieved an efficiency of 31.13%, outperforming a control device.
Aiko achieves 34.76% efficiency for 2-terminal perovskite-silicon tandem solar cell
The Chinese manufacturer said its 2-terminal 34.76%-efficient perovskite-silicon tandem lab-scale cell is based on heterojunction technology and developed by a collaboration of Solarlab Aiko Europe, Aiko headquarters, and its R&D in Yuwi, China.
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NTU achieves high stability in 25.1%-efficient inverted perovskite solar cell
Researchers at Nanyang Technological University have demonstrated a method to integrate chemically inert low-dimensional interface materials into the fabrication of inverted perovskite solar cells. Their prototype solar cells retained over 93% of the initial power conversion efficiency of 25.1% after 1,000 hours of operation, and 98% after 1,100 hours at 85 C.
Japan launches R&D call for tandem perovskite solar cell mass production
Japan’s New Energy and Industrial Technology Development Organization (NEDO) is accepting proposals for a six-year R&D program to advance large-scale manufacturing technologies and field testing of next-generation tandem perovskite solar cells.
KAUST achieves 28.7% efficiency in perovskite-perovskite-silicon tandem solar cell
An international team of researchers led by King Abdullah University of Science and Technology has fabricated a triple junction perovskite-perovskite-silicon tandem solar cell that achieved a world record efficiency for this cell architecture. The device incorporates stabilized perovskites that ensure improved performance and stability.
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