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Mendeleev Commun., 2025 Volume 35, Issue 4, Pages 390–392 (Mi mendc5704)

Communications

Fullerene-based carboxylic acids for improving performance and stability of perovskite solar cells

O. A. Kraevayaa, S. L. Nikitenkoa, N. A. Slesarenkoa, E. P. Antoshkinabc, E. A. Khakinab, A. S. Peregudovb, P. A. Troshinda, S. M. Aldoshina

a Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russian Federation
b A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119334 Moscow, Russian Federation
c Moscow Institute of Physics and Technology (National Research University), 141701 Dolgoprudny, Moscow Region, Russian Federation
d Zhengzhou Research Institute, Harbin Institute of Technology, 450003 Zhengzhou, China

Abstract: We report a family of fullerene-based carboxylic acids with varied molecular structure affecting their ability to anchor to the surface of metal oxides, in particular SnO2, used as electron-transport materials in n-i-p perovskite solar cells. Compounds having the lowest solubility and/or increased number of carboxyl groups per fullerene core tend to form more robust passivation coatings over SnO2 and thus deliver the highest solar cell efficiencies and the best device operational stabilities. The results indicate the promise of further rational design of the fullerene-based acids with improved properties to achieve simultaneously a high solar light conversion efficiency and a long-term stability.

Keywords: fullerene derivatives, electron-transport materials, perovskite solar cells, stability, passivation coatings.

Received: 21.11.2024
Accepted: 07.02.2025

Language: English

DOI: 10.71267/mencom.7688



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© Steklov Math. Inst. of RAS, 2025