期刊
APPLIED SCIENCES-BASEL
卷 11, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/app11020646
关键词
4-fluorobenzoylacrylonitrile; donor; energy conversion; energy level; organic solar cells
类别
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF2019R1F1A1063999]
- Korea Basic Science Institute under the R&D Program by the Ministry of Science and ICT [D010710]
- Jeonbuk National University
- National Research Council of Science & Technology (NST), Republic of Korea [D010710] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A novel planar donor-pi-acceptor type small organic molecule, H3T-4-FOP, was synthesized and showed promising optical, solubility, electronic and photovoltaic properties. This molecule was applied to fabricate organic solar cells with good power conversion efficiency, suggesting potential for future high-performance applications.
In order to develop new and effective donor materials, a planar donor-pi-acceptor (D-pi-A) type small organic molecule (SOM), 2-(4-fluorobenzoyl)-3-(5 ''-hexyl-[2,2 ':5 ',2 ''-terthiophen]-5-yl) acrylonitrile, named as H3T-4-FOP, was synthesized by the reaction of 4-fluorobenzoylacetonitrile (as acceptor unit) and hexyl terthiophene (as donor unit) derivatives. Promising optical, solubility, electronic and photovoltaic properties were observed for the H3T-4-FOP SOM. Significantly, the presence of 4-fluorobenzoylacetonitrile as an acceptor unit in H3T-4-FOP SOM tuned the optical band gap to similar to 2.01 eV and procured the reasonable energy levels as highest occupied molecular orbital (HOMO) of -5.27 eV and lowest unoccupied molecular orbital (LUMO) -3.26 eV. The synthesized H3T-4-FOP SOM was applied as a donor material to fabricate solution-processed bulk heterojunction organic solar cells (BHJ-OSCs) with an active layer of H3T-4-FOP: PC61BM (1:2, w/w) and was validated as having a good power conversion efficiency (PCE) of similar to 4.38%. Our studies clearly inspire for future designing of multifunctional groups containing the 4-fluorobenzoylacetonitrile based SOM for high performance BHJ-OSCs.
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