Rationally pairing photoactive materials for high-performance polymer solar cells with efficiency of 16.53％

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2020,（2）
• 页码范围: 265-271
• 页数: 7页
• 语种: 英文

摘要

The emergence of non-fullerene acceptors (NFA) offers a promising opportunity to develop high-performance donor/acceptor pairs with high power conversion efficiency,as NFAs offer tunable energy levels,broad absorption and suitable aggregation property.In order to enhance light-harvesting capability of active layers,we choose a wide bandgap polymer PTQ10 as the donor to blend with a narrow bandgap NFA Y6 as the acceptor.In comparison with PTQ10:IDIC blend,～130 nm red-shifted absorption spectrum is observed in the PTQ10∶Y6 blend,which potentially enhance the short-circuit current density (JSC) for the PSCs.In addition,the optimal PTQ10∶Y6 blend shows higher photoluminescence quenching efficiency and more efficient charge separation,higher charge mobilities,as well as weaker bimolecular recombination over the PTQ 10:IDIC blend,which leads to an outstanding power conversion efficiency (PCE) of 16.53％,with a notable JSC of 26.65 mA cm-2 and fill factor (FF) of 0.751.