TEMPO molecule approach advances perovskite photo voltaic cell sturdiness and effectivity
by Erica Marchand
Paris, France (SPX) Could 26, 2025
A group of researchers has launched a novel methodology to dramatically improve the efficiency and stability of perovskite photo voltaic cells, overcoming a longstanding barrier to their widespread use. The method, featured in Joule, employs the molecule TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) and a short infrared heating pulse to restore inner crystal defects throughout the photo voltaic cell materials.
Led by the Ecole Polytechnique Federale de Lausanne (EPFL) and supported by the College of Utilized Sciences and Arts of Western Switzerland (HES-SO) and the Politecnico di Milano, the research demonstrates that this bulk passivation approach considerably will increase efficiency-surpassing 20%-while sustaining efficiency for months below real-world circumstances.
Utilizing positron annihilation spectroscopy, the researchers confirmed that TEMPO remedy reduces vacancy-type defects throughout the perovskite layer. This quick, solvent-free methodology can also be suitable with scalable roll-to-roll manufacturing processes, much like these used within the printing trade.
“The proposed methodology is quick, solvent-free, and suitable with roll-to-roll processing, much like that used within the printing trade. This makes the expertise promising not simply within the lab, but in addition for future industrial-scale manufacturing,” stated Rafael Ferragut, physicist on the Politecnico di Milano and co-author of the paper.
The findings characterize a leap towards business manufacturing of light-weight and sturdy photo voltaic panels that might be built-in into buildings or utilized in versatile electronics and wearable units.
Analysis Report:TEMPO bulk passivation boosts the performance and operational stability of rapid-annealed FAPI perovskite solar cells
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Politecnico di Milano
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