Oxygen heterocycle-fused indacenodithiophenebithiophene enables an efficient non-fullerene molecular acceptor
Autor: | Lingling Shui, Shanshan Chen, Haijun Fan, Qihui Yue, Hao Wu, Xiaozhang Zhu, Chaochao Xia |
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Rok vydání: | 2019 |
Předmět: |
Work (thermodynamics)
Materials science Fullerene Band gap business.industry Energy conversion efficiency chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Acceptor Oxygen 0104 chemical sciences chemistry Materials Chemistry Molecule Optoelectronics 0210 nano-technology business |
Zdroj: | Journal of Materials Chemistry C. 7:15344-15349 |
ISSN: | 2050-7534 2050-7526 |
DOI: | 10.1039/c9tc05041h |
Popis: | To improve the power conversion efficiency (PCE) of solar cells based on non-fullerene acceptors (NFAs), designing low bandgap NFAs of enhanced light-harvesting capability is desirable. Herein, a new set of NFAs based on an oxygen heterocycle-fused indacenodithiophenebithiophene core, were designed and synthesized, all of which achieved low bandgaps around 1.3 eV. An optimal power conversion efficiency of ∼8.4% was realized by systematic sidechain engineering. Detailed comparison based on the designed NFAs clarifies that the optimal molecule, IDTODT-3, contributes to a moderate phase separation with balanced charge transport and reduced recombination in the blend, and thus performs best. This work verifies the effectiveness of oxygen heterocycle-fusion on realizing LBG, which provides guidelines for designing efficient NFAs via molecule-engineering. |
Databáze: | OpenAIRE |
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