Solid additive modulates acceptor crystallization to achieve 19.11% efficiency and high storage stability in organic solar cells

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 1, 2024

Language: Английский

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Suppressing Exciton–Vibration Coupling via Intramolecular Noncovalent Interactions for Low‐Energy‐Loss Organic Solar Cells

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 3, 2024

Abstract Minimizing energy loss is crucial for breaking through the efficiency bottleneck of organic solar cells (OSCs). The main mechanism can be attributed to non‐radiative recombination (Δ E nr ) that occurs due exciton–vibration coupling. To tackle this challenge, tuning intramolecular noncovalent interactions strategically utilized tailor novel fused ring electron acceptors (FREAs). Upon comprehensive analysis both theoretical and experimental results, approach effectively enhance molecular rigidity, suppress structural relaxation, reduce exciton reorganization energy, weakens coupling strength. Consequently, binary OSC device based on Y‐SeSe, which features dual strong Se ⋅ O interactions, achieves an outstanding power conversion (PCE) 19.49 %, accompanied by extremely small Δ 0.184 eV, much lower than those Y‐SS Y‐SSe devices with weaker interactions. These achievements not only set record selenium‐containing OSCs, but also mark lowest reported value among high‐performance devices. Furthermore, ternary blend showcases a remarkable PCE 20.51 one highest PCEs single‐junction OSCs. This work demonstrates effectiveness in suppressing coupling, thereby achieving low‐energy‐loss high‐efficiency

Language: Английский

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A Steric Camphane-Functionalized Fused-Ring Electron Acceptor for Efficient Ternary Non-Fullerene Organic Solar Cells

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: 7(22), P. 10662 - 10669

Published: Nov. 9, 2024

Functionalization of Y-type non-fullerene acceptors (Y-NFAs) with bulky units at the alkyl chains, terminal IC ends, or central cores has been an efficient route to boosting efficiency NFA-based organic solar cells (OSCs). Single-crystal structure analysis a powerful tool provide detailed information, such as bending conjugated backbone and packing formats molecules in solid, which can supply valuable insight into performance relation direct further molecular design new NFAs. However, growth high-quality single crystals NFAs groups is often challenging. Herein, we designed synthesized NFA, Norb-Y, decorated steric camphane unit on core through fused quinoxaline bridge. Norb-Y was successfully characterized by single-crystal analysis, revealing well-fined atomic intermolecular stacking format. Notably, displays better coplanarity small dihedral angle 18° between two groups. Moreover, three kinds π–π modes corresponding J-aggregation were identified, including end-to-end, arm-to-arm, tail-to-tail modes, all contributed segment from thiophene end. Meanwhile, H-aggregation associating suppressed units, drives assembly C–H···F H bonds instead. This kind significance for reducing voltage loss increasing OSCs' open circuit voltage, finally verified PM6:BTP-eC9:Norb-Y- D18:N3:Norb-Y-based ternary OSCs.

Language: Английский

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Enriching bottom acceptors for high-performance inkjet-printed organic solar cells

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158248 - 158248

Published: Dec. 1, 2024

Language: Английский

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Central Core Regulation by Methoxy in Quinoxaline-Based Non-Fullerene Acceptors for Over 19% Efficiency Organic Solar Cells

Published: Jan. 1, 2024

Language: Английский

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