2023 journal article

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Engineering ligand reactivity enables high-temperature operation of stable perovskite solar cells

SCIENCE, 381(6654), 209–215.

By: S. Park ^*, M. Wei ^*, J. Xu ^*, H. Atapattu ^*, F. Eickemeyer ^*, K. Darabi ⁿ, L. Grater ^*, Y. Yang ^* ...and 18 other authors, including 2 NC State authors, C. Liu ^*, S. Teale ^*, B. Chen ^*, H. Chen ^*, T. Wang ⁿ, L. Zeng^*, A. Maxwell ^*, Z. Wang ^*, K. Rao ^*, Z. Cai ^*, S. Zakeeruddin ^*, J. Pham ^*, C. Risko ^*, A. Amassian ⁿ , M. Kanatzidis ^*, K. Graham ^*, M. Gratzel^*, E. Sargent ^*

10.1126/science.adi4107

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open access via infoscience.epfl.ch (repository)

UN Sustainable Development Goal Categories

7. Affordable and Clean Energy (Web of Science; OpenAlex)

Source: Web Of Science

Added: October 16, 2023

Perovskite solar cells (PSCs) consisting of interfacial two- and three-dimensional heterostructures that incorporate ammonium ligand intercalation have enabled rapid progress toward the goal of uniting performance with stability. However, as the field continues to seek ever-higher durability, additional tools that avoid progressive ligand intercalation are needed to minimize degradation at high temperatures. We used ammonium ligands that are nonreactive with the bulk of perovskites and investigated a library that varies ligand molecular structure systematically. We found that fluorinated aniliniums offer interfacial passivation and simultaneously minimize reactivity with perovskites. Using this approach, we report a certified quasi–steady-state power-conversion efficiency of 24.09% for inverted-structure PSCs. In an encapsulated device operating at 85°C and 50% relative humidity, we document a 1560-hour T 85 at maximum power point under 1-sun illumination.