Organic Photovoltaics Utilizing Small-Molecule Donors and Y-Series Nonfullerene Acceptors

被引：43
作者：
Ge, Jinfeng [1 ,2 ]
Xie, Lin [1 ]
Peng, Ruixiang [1 ,2 ]
Ge, Ziyi [1 ,2 ]
机构：
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
来源：
ADVANCED MATERIALS | 2023年 / 35卷 / 20期
基金：
中国国家自然科学基金;
关键词：
all-small-molecule organic solar cells; nonfullerene acceptors; POLYMER SOLAR-CELLS; BULK-HETEROJUNCTION BLENDS; 14-PERCENT EFFICIENCY; ELECTRON-ACCEPTOR; CONJUGATED POLYMER; LENGTH-SCALE; MORPHOLOGY; BENZODITHIOPHENE; PERFORMANCE; DESIGN;
D O I：
10.1002/adma.202206566
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The emerging Y-series nonfullerene acceptors (Y-NFA) has prompted the rapid progress of power conversion efficiency (PCE) of all-small-molecule organic solar cells (ASM-OSCs) from around 12% to 17%. The excellent PCE improvement benefits from not only the outstanding properties of Y-series acceptors but also the successful development of small-molecule donors. The short-circuit current density, fill factor, and nonradiative recombination are all optimized to the unprecedented values, providing a scenery that is obviously different from the ITIC-series based ASM-OSCs. In this review, OSCs utilizing small-molecule donors and Y-NFA are summarized and classified in order to provide an up-to-date development overview and give an insight on structure-property correlation. Then, the characteristics of bulk-heterojunction (BHJ) formation of ASM-OSCs are discussed and compared with that of polymer-based OSCs. Finally, the challenges and outlook on designing ground-breaking small-molecule donor and forming an ideal BHJ morphology are discussed.
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页数：19
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