Passivation breakthrough drives effectivity positive aspects in perovskite silicon tandem photo voltaic cells
by Sophie Jenkins
London, UK (SPX) Sep 07, 2025
A global crew of researchers has achieved a significant advance in perovskite silicon tandem photo voltaic cell know-how by demonstrating efficient passivation on textured silicon backside cells, the business commonplace. Their work exhibits that passivation of the perovskite prime cell extends by means of the complete absorber layer, not like silicon the place it solely impacts the floor, unlocking new effectivity potential.
The collaboration, involving KAUST, the College of Freiburg, and Fraunhofer Institute for Photo voltaic Power Techniques ISE, tackled one of many largest hurdles for tandem photo voltaic cells – attaining high-quality passivation on silicon surfaces formed with massive pyramids to maximise gentle absorption. By depositing 1,3-diaminopropane dihydroiodide on the perovskite prime cell, the crew achieved wonderful passivation, producing tandem units with conversion efficiencies as much as 33.1 % and an open-circuit voltage of two.01 volts.
Lead creator Dr. Oussama Er-Raji of Fraunhofer ISE defined that earlier success in passivation was restricted to flat-front cells, however this work proves that textured designs can even profit. The scientists confirmed that passivation enhances conductivity and fill issue by means of a deep area impact that influences the complete perovskite absorber, slightly than simply the floor area.
“This realization gives a stable basis for all future analysis on this space,” stated Prof. Stefaan De Wolf of KAUST. “It enhances our understanding of the processes occurring within the prime cell whereas changing gentle into electrical energy, enabling scientists to leverage this information to develop higher tandem photo voltaic cells.”
Prof. Stefan Glunz of the College of Freiburg and Fraunhofer ISE emphasised the economic significance: “Floor passivation of photo voltaic cells isn’t just a nice-to-have function; it’s a necessary booster for his or her effectivity and stability. For right now’s silicon photo voltaic cells, floor passivation was the important thing for prime efficiencies in industrial manufacturing, and it’s encouraging that the photovoltaic business will profit from these constructive results for perovskite silicon tandem photo voltaic cells as nicely.”
The analysis builds on prior efforts throughout the Fraunhofer lighthouse mission MaNiTU and the PrEsto and Perle tasks, supported by Germany’s Federal Ministry for Financial Affairs and Power.
Analysis Report:Electron accumulation across the perovskite layer enhances tandem solar cells with textured silicon
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King Abdullah University of Science and Technology (KAUST)
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