4.8 Article

Y-Type Non-Fullerene Acceptors with Outer Branched Side Chains and Inner Cyclohexane Side Chains for 19.36% Efficiency Polymer Solar Cells

期刊

ADVANCED MATERIALS
卷 35, 期 10, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202210760

关键词

cyclohexane side chains; high open-circuit voltage; polymer solar cells; steric hindrance; ternary blends

向作者/读者索取更多资源

Raising the LUMO energy level of Y-type non-fullerene acceptors can increase the V-oc and photovoltaic performance of polymer solar cells. Steric hindrance introduced by branched alkyl chains can reduce intermolecular aggregation and raise the LUMO energy level. By adopting outer branched side chains and inner cyclohexane side chains, two new Y-type non-fullerene acceptors show outstanding V-oc and PCE values, demonstrating the potential of cyclohexane side chains in constructing high-performance non-fullerene acceptors and their PSCs.
Raising the lowest unoccupied molecular orbital (LUMO) energy level of Y-type non-fullerene acceptors can increase the open-circuit voltage (V-oc) and thus the photovoltaic performance of the current top performing polymer solar cells (PSCs). One of the viable routes is demonstrated by the successful Y6 derivative of L8-BO with the branched alkyl chains at the outer side. This will introduce steric hindrance and reduce intermolecular aggregation, thus open up the bandgap and raise the LUMO energy level. To take further advantages of the steric hindrance influence on optoelectronic properties of Y6 derivatives, two Y-type non-fullerene acceptors of BTP-Cy-4F and BTP-Cy-4Cl are designed and synthesized by adopting outer branched side chains and inner cyclohexane side chains. An outstanding V-oc of 0.937 V is achieved in the D18:BTP-Cy-4F binary blend devices along with a power conversion efficiency (PCE) of 18.52%. With the addition of BTP-eC9 to extend the absorption spectral coverage, a remarkable PCE of 19.36% is realized finally in the related ternary blend devices, which is one of the highest values for single-junction PSCs at present. The results illustrate the great potential of cyclohexane side chains in constructing high-performance non-fullerene acceptors and their PSCs.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据