Passivation breakthrough drives effectivity positive aspects in perovskite silicon tandem photo voltaic cells
by Sophie Jenkins
London, UK (SPX) Sep 07, 2025
A world 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 customary. Their work exhibits that passivation of the perovskite high cell extends by your complete absorber layer, in contrast to 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 Vitality Methods ISE, tackled one of many greatest hurdles for tandem photo voltaic cells – attaining high-quality passivation on silicon surfaces formed with giant pyramids to maximise gentle absorption. By depositing 1,3-diaminopropane dihydroiodide on the perovskite high cell, the crew achieved glorious passivation, producing tandem gadgets with conversion efficiencies as much as 33.1 p.c 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 may also profit. The scientists confirmed that passivation enhances conductivity and fill issue by a deep subject impact that influences your complete perovskite absorber, fairly than simply the floor area.
“This realization gives a strong 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 high 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 commercial significance: “Floor passivation of photo voltaic cells is not only a nice-to-have characteristic; 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 optimistic results for perovskite silicon tandem photo voltaic cells as effectively.”
The analysis builds on prior efforts inside the Fraunhofer lighthouse venture MaNiTU and the PrEsto and Perle initiatives, supported by Germany’s Federal Ministry for Financial Affairs and Vitality.
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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