Inorganic perovskite photo voltaic cells close to market readiness with document effectivity and stability
by Robert Schreiber
Berlin, Germany (SPX) Oct 09, 2025
Scientists at Kaunas College of Know-how (KTU), working with worldwide companions, report one of many highest efficiencies but for totally inorganic perovskite photo voltaic cells and, crucially, present they will run stably for lots of of hours, narrowing the hole with business silicon. “Perovskite photo voltaic cells are one of many fastest-growing photo voltaic applied sciences on the planet – they are often light-weight, thin-film, and versatile, and most significantly, they’re created from cheap supplies,” mentioned KTU researcher Dr Kasparas Rakstys.
The workforce tackled perovskite instability by devising a passivation strategy that types a protecting 2D layer atop a 3D inorganic perovskite. They synthesized perfluorinated 2D ammonium cations whose strongly electronegative fluorine atoms decrease the electron density of the ammonium group, enabling hydrogen bonding between the anchoring ammonium group and lead iodide fragments.
“Passivation makes the perovskite floor chemically inactive, eliminating the defects launched throughout manufacturing,” he famous. For totally inorganic compositions, adhesion is usually poor: “Merely put, 2D layers don’t persist with pure inorganic perovskite,” he mentioned.
The brand new chemistry overcame that barrier: “The consequence was the formation of a secure 2D layer on the floor of the 3D inorganic perovskite. This time, the 2D layers lastly adhered, forming strong heterostructures that stay secure even at excessive temperatures,” Dr Rakstys emphasised.
Gadgets surpassed 21 % effectivity; mini-modules with lively areas greater than 300 occasions bigger than commonplace lab cells reached practically 20 % and operated stably for over 950 hours at 85oC underneath steady gentle.
“Though photo voltaic cells don’t usually attain such excessive temperatures underneath actual working circumstances, these standardised stability exams are used to evaluate their long-term sturdiness, and such excessive stability is virtually corresponding to the necessities of economic silicon cells,” he added.
The work, involving greater than 20 researchers, seems in Nature Power and underscores that next-generation perovskite expertise is advancing towards business deployment.
Analysis Report:Cation interdiffusion control for 2D/3D heterostructure formation and stabilization in inorganic perovskite solar modules
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Kaunas University of Technology
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