Asymmetric Alkyl Chain Engineering for Efficient and Eco-Friendly Organic Photovoltaic Cells

被引：4

作者：

Wang, Tao ^{[1
]}

Cui, Yong ^{[1
]}

Ren, Junzhen ^{[1
,2
]}

Yu, Yue ^{[1
,2
]}

Wang, Jianqiu ^{[1
]}

Yang, Ni ^{[1
,2
]}

Zhang, Tao ^{[1
,2
]}

Hou, Jianhui ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China

来源：

SMALL | 2025年 / 21卷 / 02期

基金：

中国国家自然科学基金;

关键词：

asymmetric alkyl chain engineering; non-fullerene acceptors; non-halogen solvents; organic photovoltaic cells; SOLAR-CELLS;

D O I：

10.1002/smll.202408308

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Recent advancements in organic photovoltaic (OPV) cells have resulted in power conversion efficiencies (PCEs) surpassing 20%. However, the use of halogen solvents in the fabrication of OPV cells raises concerns due to their potential environmental and health impacts. In this work, a novel non-fullerene small molecule acceptor BO-AM-4F, featuring an asymmetric alkyl chain design that includes a 2-butyloctyl and a unique 6-(hexylamino)-6-oxohexyl chain is synthesized. This design significantly improves molecular packing, crystallinity, and electrostatic potential distribution compared to the controlled acceptor DBO-4F, which possesses symmetric 2-butyloctyl chains. When combined with the polymer donor PBDB-TF and processed using the non-halogen solvent o-xylene, the BO-AM-4F-based OPV cell achieves an impressive PCE of 18.0%, surpassing the 16.6% PCE observed in the PBDB-TF:DBO-4F device. Furthermore, the PBDB-TF:BO-AM-4F system demonstrates enhanced photostability and thermal stability compared to its DBO-4F counterpart. These findings emphasize asymmetric alkyl chain engineering as an effective strategy for developing high-performance, environmentally friendly OPV materials. This represents a significant step towards sustainable OPV technology.

引用

页数：10

共 38 条

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