Y‐Type Non‐Fullerene Acceptors with Outer Branched Side Chains and Inner Cyclohexane Side Chains for 19.36% Efficiency Polymer Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(10)

Published: Jan. 5, 2023

Abstract Raising the lowest unoccupied molecular orbital (LUMO) energy level of Y‐type non‐fullerene acceptors can increase open‐circuit voltage ( V oc ) and thus photovoltaic performance current top performing polymer solar cells (PSCs). One viable routes is demonstrated by successful Y6 derivative L8‐BO with branched alkyl chains at outer side. This will introduce steric hindrance reduce intermolecular aggregation, open up bandgap raise LUMO level. To take further advantages influence on optoelectronic properties derivatives, two BTP‐Cy‐4F BTP‐Cy‐4Cl are designed synthesized adopting side inner cyclohexane chains. An outstanding 0.937 achieved in D18:BTP‐Cy‐4F binary blend devices along a power conversion efficiency (PCE) 18.52%. With addition BTP‐eC9 to extend absorption spectral coverage, remarkable PCE 19.36% realized finally related ternary devices, which one highest values for single‐junction PSCs present. The results illustrate great potential constructing high‐performance their PSCs.

Language: Английский

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Ternary strategy enabling high-efficiency rigid and flexible organic solar cells with reduced non-radiative voltage loss

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(4), P. 1563 - 1572

Published: Jan. 1, 2022

The addition of ZY-4Cl into the host PM6:BTP-eC9 can result in reduced density trap states and suppressed non-radiative recombination, thus enabling ternary device with an obviously lower voltage loss than either binary devices.

Language: Английский

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High-speed sequential deposition of photoactive layers for organic solar cell manufacturing

Nature Energy, Journal Year: 2022, Volume and Issue: 7(11), P. 1087 - 1099

Published: Oct. 27, 2022

Language: Английский

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Auxiliary sequential deposition enables 19%-efficiency organic solar cells processed from halogen-free solvents

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Oct. 31, 2023

High-efficiency organic solar cells are often achieved using toxic halogenated solvents and additives that constrained in industry. Therefore, it is important to develop materials or processing methods enabled highly efficient processed by halogen free solvents. In this paper, we report an innovative method named auxiliary sequential deposition enables 19%-efficiency Our different from the conventional blend casting involves additional of dithieno[3,2-b:2',3'-d]thiophene between depositions donor (D18-Cl) acceptor (L8-BO) layers. The dramatic performance enhancement 15% over 18% compared methods. Furthermore, incorporating a branched-chain-engineered called L8-BO-X, device can be boosted 19% due increased intermolecular packing, representing top-tier values for green-solvent cells. Comprehensive morphological time-resolved characterizations reveal superior morphology through promotes charge generation while simultaneously suppressing recombination. This research underscores potential fabricating environmentally friendly

Language: Английский

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Achieving highly efficient all-polymer solar cells by green-solvent-processing under ambient atmosphere

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(8), P. 4499 - 4507

Published: Jan. 1, 2021

The nonhalogenated solvent o-XY-processed-all-PSCs achieved a highly-efficient PCE of 15.6% along with decent processability under ambient conditions.

Language: Английский

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