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Kim, Jin Young
Next Generation Energy Laboratory
Research Interests
  • Polymer solar cells, QD solar cells, organic-inorganic hybrid solar cells, perovskite solar cells, OLEDs, PeLEDs, organic FETs

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Non-fullerene polymer solar cells based on quinoxaline units with fluorine atoms

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Title
Non-fullerene polymer solar cells based on quinoxaline units with fluorine atoms
Author
Keum, SanghaSong, SuheeCho, Hye WonPark, Chan BeomPark, Seong SooLee, Won-KiKim, Jin YoungJin, Youngeup
Issue Date
2021-02
Publisher
ELSEVIER SCIENCE SA
Citation
SYNTHETIC METALS, v.272, pp.116655
Abstract
In this study, low bandgap polymers containing a monofluoroquinoxaline (FQx) or a difluoroquinoxaline (DFQx) as the electron-deficient unit and 2-thiophenylbenzo[1,2-b:4,5-b']dithiophene as the electron-rich unit were synthesized by Stille polymerization. The polymers exhibit satisfactory thermal stability and a broad absorption band from 300 to 650 nm. The HOMO/LUMO energy levels of PB-FQx and PB-DFQx were - 5.62/- 3.64 and -5.70/-3.63 eV, respectively. We found that for a high number of fluorine atoms in the conjugated backbone, the HOMO energy levels were deeper, which led to increased V-OC. The PB-DFQx:ITIC-based PSC exhibited the best power conversion efficiency of 6.31%, with its V-OC of 0.99 V, JSC of 10.61 mA/cm(2), FF of 60%.
URI
https://scholarworks.unist.ac.kr/handle/201301/52933
URL
https://www.sciencedirect.com/science/article/pii/S0379677920309073?via%3Dihub
DOI
10.1016/j.synthmet.2020.116655
ISSN
0379-6779
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