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Yang, Changduk
Advanced Tech-Optoelectronic Materials Synthesis Lab (ATOMS)
Research Interests
  • Optoelectronic materials synthesis/organic electronics, functionalization of carbonaceous solids, advanced materials chemistry, macromolecular chemistry

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All-Small-Molecule Organic Solar Cells with an Ordered Liquid Crystalline Donor

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Title
All-Small-Molecule Organic Solar Cells with an Ordered Liquid Crystalline Donor
Author
Chen, HaiyanHu, DYang, QianguangGao, JieFu, JiehaoYang, KeHe, HaoChen, ShanshanKan, ZhipengDuan, TainanYang, ChangdukOuyang, JianyongXiao, ZeyunSun, KuanLu, Shirong
Issue Date
2019-12
Publisher
CELL PRESS
Citation
JOULE, v.3, no.12, pp.3034 - 3047
Abstract
The crystallinity and intermolecular interaction among small molecules are enhanced in order to achieve reasonable phase segregation between the donor and acceptor in all-small-molecule organic solar cells (ASM OSCs). By substituting an alkyl side chain with a chlorine (Cl) atom on the original benzodithiophene terthiophene rhodanine (BTR) molecule, the new small molecular donor, namely BTR-Cl, processes a more ordered liquid crystalline property, down-shifted molecular energy levels, and higher crystallinity. When blended with a non-fullerene acceptor Y6, which has a complementary absorption profile and well-matched energy levels but no liquid crystalline property, a prominent phase separation and optimal film morphology are obtained. As a result, a record-high power conversion efficiency (PCE) of 13.6% is achieved, taking a large step forward in ASM OSCs. Our results highlight the importance of crystallinity to phase separation, suggesting the great promise of liquid crystalline materials in OSCs.
URI
https://scholarworks.unist.ac.kr/handle/201301/30702
URL
https://www.sciencedirect.com/science/article/pii/S2542435119304696
DOI
10.1016/j.joule.2019.09.009
ISSN
2542-4351
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