Organic photovoltaic cells offer ultrahigh VOC of ∼ 1.2 V under AM 1.5G light and a high efficiency of 21.2 % under indoor light

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 451, P. 139080 - 139080

Published: Sept. 8, 2022

Language: Английский

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CF₃-Terminated Side Chain Enables Efficiencies Surpassing 18.2% and 16.1% in Small- and Large-Scale Manufacturing of Organic Solar Cells

ACS Energy Letters, Journal Year: 2022, Volume and Issue: 8(1), P. 96 - 106

Published: Nov. 22, 2022

Many studies have proven the significant roles of side chains far beyond being solubilizing groups as well interesting merits fluorination on π-backbones in intrinsic properties and device performances organic semiconductors. Considering integration two features, we herein introduce a 4,4,4-trifluorobutyl (CF3-terminated) chain into 2H-1,2,3-benzotriazole-core-based acceptor–donor–acceptor–donor–acceptor-type nonfullerene acceptor (NFA) named YCF3 demonstrate its effectiveness optoelectronic, morphological, photovoltaic properties. Comparative experimental theoretical confirmed unique features (e.g., red-shifted film absorption, better absorptivity, finely adjusted energies, higher mobility) associated with enhanced crystalline nature, compared analogous NFA an n-butyl YCH3. The best power conversion efficiency (PCE) 18.21% is achieved YCF3-based binary solar cell (OSC) together good heat light stability. Moreover, OSC presents remarkable PCE 16.11% inverted-structure large-area device.

Language: Английский

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High-Performance Ternary Organic Solar Cells through Incorporation of a Series of A₂-A₁-D-A₁-A₂ Type Nonfullerene Acceptors with Different Terminal Groups

ACS Energy Letters, Journal Year: 2022, Volume and Issue: 7(8), P. 2845 - 2855

Published: Aug. 3, 2022

A ternary strategy has been considered to be a simple and efficient method further improve the performance of organic solar cells (OSCs). Here, three benzotriazole-based nonfullerene acceptors (NFAs) with similar A2-A1-D-A1-A2 backbones except for different terminal groups, are utilized as guest components classic PM6:BTP-BO-4F binary host. Excitingly, BTA1–3 all realize much better photovoltaic in devices minimized energy loss (Eloss) improved open-circuit voltage (VOC), suggesting that it is bridge A1 unit plays decisive role. Additionally, short-circuit current density (JSC) fill factor (FF) BTA2-/BTA3-incorporated can enhanced simultaneously, resulting from more photon harvesting, increased exciton dissociation, charge transport, reduced recombination. The highest efficiency 18.27% obtained BTA2 device, one top values PM6-based OSCs. This work suggests type NFAs effective improving

Language: Английский

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Refining acceptor aggregation in nonfullerene organic solar cells to achieve high efficiency and superior thermal stability

Science China Chemistry, Journal Year: 2022, Volume and Issue: 66(1), P. 202 - 215

Published: Nov. 23, 2022

Language: Английский

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Recent progress in side chain engineering of Y-series non-fullerene molecule and polymer acceptors

Science China Chemistry, Journal Year: 2023, Volume and Issue: 67(3), P. 788 - 805

Published: Nov. 29, 2023

Language: Английский

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