Fullerene Buffer Layer

Scavenges superoxide radicals

An interfacial material that protects buried interfaces and grain boundaries in perovskite solar cells by scavenging superoxide radicals, improving long-term stability.

Liao, Ling · Chengrong, Wang · Jin, Bo · Guo, Zhicheng · Zhao, Yang · Zheng, Tian · Chenchen, Yuan · Peng, Rufang

Chemical Engineering Journal 2025

Advantages

Scavenges superoxide radicals

C60TPN and C60PDD absorb superoxide radicals, eliminating their induced degradation at the source.

Protects buried interface

The C60TPN buffer layer inhibits superoxide radical generation at the SnO2 surface, reducing defect density and improving interfacial contact.

Repairs grain boundary defects

The C60PDD additive stitches grain boundaries, resisting the invasion of superoxide radicals and reducing trap density.

Applications

• perovskite solar cells：Directly applied in perovskite solar cell fabrication to enhance stability and efficiency.
• photocatalysis：The radical scavenging strategy can be transferred to photocatalytic systems to suppress charge recombination.
• electrochemical energy storage：The interface protection concept can be adapted for energy storage devices to mitigate interfacial side reactions.