Molecular symmetry effect on the morphology and self-aggregation of semiconducting polymers
SCIE
SCOPUS
- Title
- Molecular symmetry effect on the morphology and self-aggregation of semiconducting polymers
- Authors
- Park Sang Ah; Kim Do Hui; Choi Yelim; Lee Dae Hwan; Park Taiho; Cho Shinuk; Kim Minjun
- Date Issued
- 2023-01
- Publisher
- Royal Society of Chemistry
- Abstract
- Molecular self-aggregation and crystallization of the semiconducting polymer (SCP) are key features of organic electronic devices. In this study, we synthesized a new polymer with an asymmetrically incorporated fluorine atom in the TVT (asy-1FTVT) of a donor-acceptor type SCP (asy-PNDI1FTVT) and compared its optical and physical properties with those of two symmetric acceptor polymers (PNDITVT and PNDI2FTVT). The molecular aggregation and crystallization behavior of the newly synthesized asy-PNDI1FTVT, containing irregularities within the repeating unit, differed from those of the two symmetric polymers. Atomic force microscopy and grazing-incidence wide-angle X-ray scattering revealed much lower crystallinity of asy-PNDI1FTVT than that of the symmetric polymers. In performance tests of polymer solar cells with an inverted structure, PTB7-Th:asy-PNDI1FTVT exhibited a well-mixed morphology between the donor and acceptor polymers and efficiently facilitated the charge dissociation process, thereby enhancing the short-circuit current (J(SC)) and the power conversion efficiency.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/122949
- DOI
- 10.1039/d2py01219g
- ISSN
- 1759-9954
- Article Type
- Article
- Citation
- Polymer Chemistry, vol. 14, no. 3, page. 374 - 382, 2023-01
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