High efficiency and stability achieved in perovskite cells using fullerene derivatives

by Riko Seibo

Tokyo, Japan (SPX) Nov 15, 2025

Researchers in China have enhanced the efficiency and sturdiness of inverted perovskite photo voltaic cells by creating two new 56pi-electron fullerene derivatives often called C60-TFB and C60-TFP to be used as electron transport layers.

The analysis group synthesized C60-TFB and C60-TFP by way of a 1,4-unsymmetrical addition strategy, giving the molecules cumbersome tert-butyl, indole, and azaindole teams. These teams forestall dimerization when uncovered to gentle and provide robust binding with the perovskite layer, leading to diminished defects. The ensuing electron transport layer varieties an efficient barrier to cease the migration of iodide ions from the perovskite layer and silver atoms from the electrode.

Units examined with the brand new C60-TFP electron transport layer reached an influence conversion effectivity of 25.93 p.c, increased than the 24.08 p.c achieved with standard PCBM-based gadgets. Throughout a 1000-hour interval of steady illumination at 55 levels Celsius, the brand new gadgets retained 81.9 p.c of their preliminary effectivity. As compared, gadgets utilizing PCBM held solely 62.9 p.c. The outcomes verify the advantages of the brand new fullerene derivatives for growing stability in perovskite photo voltaic cells.

Professor Shangfeng Yang commented, “Coinciding with the fortieth anniversary of the invention of fullerene, he’s assured that extra novel fullerene-based electron transport supplies will emerge for high-performance perovskite photo voltaic cells sooner or later.”

Analysis Report:Anti-dimerization 56p-electron fullerene adduct bearing bulky functional groups for inverted perovskite solar cells with enhanced interfacial stability

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