Recent progress in small‐molecule donors for non‐fullerene all‐small‐molecule organic solar cells
Ze Zhang,
Yaokun Wang,
Chenkai Sun,
Zitong Liu,
Haiqiao Wang,
Lingwei Xue,
Zhi‐Guo Zhang
Affiliations
Ze Zhang
Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China
Yaokun Wang
Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China
Chenkai Sun
College of Chemistry and Molecular Engineering Zhengzhou University Henan 450001 China
Zitong Liu
State Key Laboratory of Applied Organic Chemistry (SKLAOC) College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China
Haiqiao Wang
Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers Beijing University of Chemical Technology Beijing 100029 China
Lingwei Xue
Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China
Zhi‐Guo Zhang
Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China
Abstract All‐small‐molecule organic solar cells (all‐SM OSCs), with p‐type small molecule (p‐SM) as donor and n‐type small molecule (n‐SM) as acceptor, have drawn intensive research interests in recent years. All‐SM OSCs show advantages to their polymer counterparts, including well‐defined chemical structure, easy purification, and better repeatability in devices. The highest power conversion efficiency (PCE) of all‐SM OSCs has increased quickly to over 15% nowadays. In this review, we just summarize the progress of non‐fullerene all‐SM OSCs (NF all‐SM OSCs) in recent five years, by dividing small‐molecule donors into four categories based on the molecular segments of oligothiophene, benzo[1,2‐b:4,5‐b’]dithiophene (BDT) trimer, typical BDT‐central unit connected with π‐bridges of thiophene or electron deficient acceptor units. We aim to illustrate the relationship of molecular structures, properties, and device performance of small‐molecule donors with those different molecular segments. Furthermore, the tendency of molecular design for photo‐active materials are also depicted and summarized. Finally, we give our views on the future prospects of NF all‐SM OSCs to design the next‐generation OSCs.
