Backbone Twisting and Terminal Overlapping via π‐Bridge Engineering for Highly Efficient Non‐Fused Ring Electron Acceptors with Balanced J_SC‐V_OC

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 16, 2025

Abstract High and balanced open‐circuit voltage ( V OC ) short‐circuit current density J SC are crucial for the efficiency of organic solar cells (OSCs). Generally, π‐bridge strategy serving as an effective molecular functionalization route with potential to balance ‐ pair. Herein, study designs synthesizes three non‐fused ring electron acceptors (NFREAs): 2T‐T‐EH , 2T‐T‐2EH 2T‐TT‐2EH by systematically regulating at size, number, position lateral alkyl chains. Introducing inner side chains result in twisted backbones, which elevated lowest unoccupied orbital (LUMO) energy levels, reduced loss, facilitating a higher . Single crystal analysis also reveals that π‐extending can effectively relieve congestion dual chains, leave more space terminal overlapping, promotes efficient charge transport enhancing Consequently, compromise between (0.916 V) (21.21 mA cm −2 is accomplished binary OSCs. The LUMO level provides serve third component ternary OSCs, achieving impressive power conversion (PCE) 19.07% D18:BTP‐eC9‐4F: ‐based device. These findings this suggest fine‐tuning π‐bridges simple method optimizing photovoltaic performance NFREAs, ensuring well‐balanced

Language: Английский

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Biphenyl core boosts the photovoltaic performance of ether-bonded perylene diimides based nonfullerene acceptors

Dyes and Pigments, Journal Year: 2025, Volume and Issue: unknown, P. 112771 - 112771

Published: March 1, 2025

Language: Английский

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Optimizing Miscibility for Enhanced Photovoltaic Performance of Non-Fused Ring Electron Acceptors through Side-Chain Engineering

Physical Chemistry Chemical Physics, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Side-chain engineering is employed to optimize the miscibility of non-fused ring electron acceptors and donors. The PBDB-T:A1C6-Cl blend film exhibits better finer phase separation, contributing higher device efficiency.

Language: Английский

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Optimizing Branching Linkers in Dimerized Acceptors for Enhanced Efficiency and Stability in Organic Solar Cells

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Most high-performing dimerized acceptors are based on Y-series precursors with superior conjugated π-backbones. The utilization of branch-connected can fully leverage the four end groups to enhance molecular packing, thereby potentially improving both stability organic solar cells (OSCs) while maintaining high power conversion efficiency (PCE). Therefore, optimizing linker is critical realizing their potential in device performance. In this study, three synthesized and conjugation-break linkers branching direction systematically investigate effects different structures properties By introducing an appropriate flexible chain, favorable solubility, morphology achieved, which facilitates charge generation transport suppressing recombination. As a result, OSC dYTAT-C6-F exhibits significantly improved PCE 18.08%, highest among direction. Additionally, demonstrates T80 lifetime 1840 h. These results indicate that conjugation breakages tune aggregation, carrier mobility length further improves these characteristics. findings highlight significant engineering achieve outstanding

Language: Английский

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Efficient non-fused electron acceptor with C-shaped molecular geometry for photovoltaic application

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A novel non-fused acceptor, AC2, with a C-shaped geometry and 3D stacking property, was designed for organic solar cells. AC2 exhibits efficient charge transport reduced energy loss, which broadens the design prospects acceptors.

Language: Английский

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Deuteration solid additive strategy for high-performance and thermally robust organic solar cells

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162655 - 162655

Published: April 1, 2025

Language: Английский

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Asymmetric non-fused-ring acceptors with thienoisochromene subunit: Synthesis and improved photoelectronic property enabled by dual-donor center skeleton enlargement and terminal chlorination

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160717 - 160717

Published: Feb. 1, 2025

Language: Английский

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Synergistic Molecular Engineering of Fully Non‐fused Ring Acceptors for Achieving Efficient Zigzag Charge Transport Channel and Low Non‐Radiative Voltage Loss

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Abstract Fully non‐fused ring acceptor (FNFRA) are potentially important for boosting the performance and lowering material costs of organic solar cells (OSCs). Despite their potential, FNFRA‐based OSCs have not yet matched fused partial counterparts due to limited molecular engineering research. In this work, by incorporating a synergistic strategy tailoring β ‐side chain end‐group FNFRA with cyclic “belt” simultaneously, named C6FT‐2F2Cl is constructed. Compared other symmetric FNFRAs, features shorter π–π stacking distance an efficient zigzag charge transport channel, leading enhanced balanced carrier mobilities, lower non‐radiative energy loss higher short‐circuit current density. The power conversion efficiency (PCE) C6FT‐2F2Cl‐based OSC reached 13.19%, which among best in devices. This work provides new valuable insights mechanism associated FNFRAs paves route materials design toward high‐performance low‐cost OSCs.

Language: Английский

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