Fluorination Triggered New Small Molecule Donor Materials for Efficient As-Cast Organic Solar Cells
Type
ArticleAuthors
Yang, YutingWang, Kai
Li, Gongqiang
Ran, Xueqin
Song, Xin

Gasparini, Nicola
Zhang, Qian-Qian
Lai, Xue
Guo, Xiao
Meng, Fei
Du, Mengzhen
Huang, Wei
Baran, Derya

KAUST Department
KAUST Solar Center (KSC)Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2018-07-29Online Publication Date
2018-07-29Print Publication Date
2018-08Permanent link to this record
http://hdl.handle.net/10754/630430
Metadata
Show full item recordAbstract
Solution-processable small molecules (SMs) have attracted intense attention due to their definite molecular structures, less batch-to-batch variation, and easier structure control. Herein, two new SM donors based on substituted isatin unit (DI3T, DI3T-2F) are synthesized and applied as electron donors with the mixture of PC71 BM to construct organic photovoltaics. As a result, 5,6-difluoro isatin derivative (DI3T-2F) obtains a power conversion efficiency of 7.80% by a simple solution spin-coating fabrication process without any additives, solvent, or thermal annealing process. More intuitively, due to stronger intermolecular interaction and higher hole mobility after the incorporation of fluorine atoms in end units, the devices present good tolerance to active layer thickness. The results indicate that DI3T-2F shows promising potential for large-scale printing processes and flexible application of efficient small molecule organic solar cells.Citation
Yang Y, Wang K, Li G, Ran X, Song X, et al. (2018) Fluorination Triggered New Small Molecule Donor Materials for Efficient As-Cast Organic Solar Cells. Small 14: 1801542. Available: http://dx.doi.org/10.1002/smll.201801542.Sponsors
This work was financially supported by the National Key R&D Program of China (2017YFA0204704), the National Science Foundation of China (51773091, 61604069), Natural Science Foundation of Jiangsu Province (BK20171465, BK20150064), and the High Performance Computing Center of Nanjing Tech University supporting the computational resources; X.S. N.G., and D.B. acknowledge King Abdullah University of Science and Technology (KAUST) Solar Center Competitive Fund (CCF) for financial support. The authors thank the beamline BL16B1 (Shanghai Synchrotron Radiation Facility) for providing the assistance.Publisher
WileyJournal
SmallAdditional Links
https://onlinelibrary.wiley.com/doi/full/10.1002/smll.201801542ae974a485f413a2113503eed53cd6c53
10.1002/smll.201801542