Forced coplanarity of dithienofluorene-based non-fullerene acceptors to achieve high-efficiency organic solar cells
| العنوان: | Forced coplanarity of dithienofluorene-based non-fullerene acceptors to achieve high-efficiency organic solar cells |
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| المؤلفون: | Po Kai Huang, Yen Chen Su, Kai En Hung, Yen-Ju Cheng, Shao Ling Chang, Wen Chia Huang, Fong Yi Cao |
| المصدر: | Journal of Materials Chemistry A. 7:17947-17953 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Electron mobility, Fullerene, Materials science, Organic solar cell, Renewable Energy, Sustainability and the Environment, 02 engineering and technology, General Chemistry, Coplanarity, 021001 nanoscience & nanotechnology, Photochemistry, Electron transport chain, Acceptor, Bathochromic shift, General Materials Science, Thermal stability, 0210 nano-technology |
| الوصف: | Ladder-type structures have been the key element for high performance non-fullerene acceptors (NFAs). In this work, two dithieno[3,2-b:6,7-b′]fluorine (DTF)-based nonfullerene acceptors, non-bridged DTFT5-FIC and carbon-bridged DTFT9-FIC, with an identical conjugated backbone were designed and synthesized for investigation of the planarization effect. The chemical rigidification with forced coplanarity indeed plays a pivotal role in determining the molecular properties. Compared to the non-bridged open-chain DTFT5-FIC counterpart, the nonacyclic ladder-type DTFT9-FIC with a fully planarized backbone exhibits higher thermal stability, bathochromic absorption and higher electron mobility. The devices using PBDB-T as the p-type polymer and fully planar DTFT9-FIC as the acceptor showed a high efficiency of 9.58%, which is superior to that of the device using the partially planar DTFT5-FIC material (5.45%). By incorporating PC71BM as the second acceptor to enhance the absorption at shorter wavelengths, optimize the morphology and facilitate electron transport, the ternary-blend device using PBDB-T:DTFT9-FIC:PC71BM achieved the highest PCE of 11.82% with a Voc of 0.88 V, a higher Jsc of 20.59 mA cm−2, and an FF of 65.27%. |
| تدمد: | 2050-7496 2050-7488 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::a3f1330484d9ea3a5f6dad91eebc3fa3 https://doi.org/10.1039/c9ta05116c |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........a3f1330484d9ea3a5f6dad91eebc3fa3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20507496 20507488 |
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