Piperidine-Side-Chain Cathode Interlayer

Enhanced device lifetime

Replacing linear amine side chains with cyclic piperidine increases steric hindrance, mitigating adverse effects on active layer acceptors while achieving both high efficiency and long-term stability.

Jiashuai, Wang · Wang, Ting · Xiong, Wei · Xu, Luhang · Liu, Chunchen · Lu, Xinhui · Fan, Baobing · Huang, Fei · Cao, Yong

Small 2026

Specifications

Power conversion efficiency

{'zh': '19.8', 'en': '19.8'} %

Advantages

Piperidine side-chain

The cyclic piperidine provides greater steric hindrance than linear amines, suppressing detrimental interactions with the active layer acceptor and enhancing device stability.

Applications

• Organic solar cells：Directly used as cathode interlayer to improve device stability and lifetime.
• Interface engineering：Tune interfacial properties via side-chain engineering to optimize electron extraction.