High‐Performance Photoactive Polymers: Innovations in Ternary Polymerization for Solar Applications

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

Published: Feb. 2, 2025

Abstract In recent years, polymer solar cells (PSCs) have achieved rapid progress, with power conversion efficiencies (PCEs) reaching up to 20.25%, driven by significant advancements in device fabrication and active‐layer materials. The ternary polymerization strategy has proven be a straightforward effective approach for developing high‐performance photoelectric polymers incorporating third monomer into the backbone. This incorporation effectively optimizes intrinsic properties, including UV–vis absorption, energy levels, solubility, crystallinity, morphology, charge transfer, mechanical robustness, batch‐to‐batch reproducibility, stability. review highlights latest designing photoactive copolymers (both donors acceptors), particular focus on stability, potential applications commercial development. aim is provide valuable guidance development of materials using strategy.

Language: Английский

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Rational Design of Terpolymer Acceptors for High-Efficiency All-Polymer Solar Cells

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Three terpolymers were developed via a ternary polymerization strategy. Owing to appropriate aggregation behavior and improved compatibility, the J2-based all polymer device offers an excellent power conversion efficiency up 16.5%.

Language: Английский

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Enhancing the Electrostatic Potential To Develop High-Performance Polymer Donors via a Ternary Copolymerization Strategy

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Ternary copolymerization has been proven to be an effective method regulate the photovoltaic properties of polymer donors. However, terpolymers synthesized using ternary strategy inevitably disrupt periodic sequence distribution backbone, resulting in increased molecular disorder and heightened main-chain entropy. Herein, we developed two terpolymer donors by introducing electron-deficient fused-ring skeleton unit BTP with a large dipole moment into main chain PM6 via copolymerization. We found that presence enables exhibit enhanced crystallinity electrostatic potential, leading excellent miscibility more ordered packing than PM6. As result, maximum PCE 19.40% was achieved for PY5:L8-BO-based device. Overall, this work introduces novel approach developing high-performance combining third component moments restrain enhance intermolecular interaction force between acceptors.

Language: Английский

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Suppressing Voltage Loss and Improving Charge Generation via Fluorinated Molecular Backbone of Low-Cost Polymers for Efficient Organic Solar Cells

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

High efficiency and low cost are indispensable for the industrialization of organic solar cells (OSCs), which urgently needs to be addressed. Herein, three simple-structure terpolymer donors, PTQ13-5, PTQ13-10, PTQ13-15, developed by embedding a simple fluorinated unit 3-fluorothiophene (T-F) into molecular backbone polymer PTQ10 pursue low-cost high-efficiency photovoltaic molecules. Three terpolymers show obviously characteristics due their short synthesis routes high total synthetic yields from cheap raw materials. The introduction T-F leads blue-shifted absorption, down-shifted HOMO levels, more favored aggregation morphology terpolymers, mainly strong electron-withdrawing property F atom, along with presence noncovalent F···H interactions. As result, PTQ13-5-based OSC achieves enhanced power conversion (PCE) 18.42% suppressed voltage loss (Vloss) because nonradiative 0.189 eV charge generation; this is one highest PCEs OSCs based on This work suggests that fluorination an effective strategy suppress Vloss improve generation OSCs, it offers rational guide in design molecules performance.

Language: Английский

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Synergistic Interface Engineering via o‐Difluorobenzene‐Mediated HPWO Crystallization and ITO Fluorination for 20.57% Efficiency Organic Solar Cells

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

Published: April 25, 2025

Abstract Interfacial energy loss is a critical challenge in achieving high‐efficiency organic solar cells (OSCs), primarily due to mismatched levels and inefficient charge collection. Herein, bifunctional interface engineering strategy proposed, employing an ethanol/o‐difluorobenzene (EtOH/o‐DFB) dual‐solvent system for phosphotungstic acid (HPWO) processing. During film formation, o‐DFB regulates HPWO crystallization by suppressing excessive aggregation, while enabling situ ITO fluorination through the adsorbed o‐DFB. This synergistic approach simultaneously mitigates trap‐assisted nonradiative recombination at hole transport layer enhancing electrode work function, resulting better ohmic contact, minimized trap‐state densities, improved level alignment electrode/active interface. The effectiveness of this demonstrated across multiple active systems. Remarkable power conversion efficiencies 19.55%, 20.07%, 20.57% are achieved PM6/L8‐BO, D18/L8‐BO, D18/BTP‐eC9‐based OSCs, respectively. Notably, PCE represents one highest reported date highlighting potential advancing high‐performance photovoltaics.

Language: Английский

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Organic Solar Cell with Efficiency of 20.49% Enabled by Solid Additive and Non‐Halogenated Solvent

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

Published: April 26, 2025

Abstract Recently, benzene‐based solid additives (BSAs) have emerged as pivotal components in modulating the morphology of blend film organic solar cells (OSCs). However, since almost all substituents on BSAs are weak electron‐withdrawing groups and contain halogen atoms, study with non‐halogenated strong has received little attention. Herein, an additive strategy is proposed, involving incorporation benzene ring. An effective BSA, 4‐nitro‐benzonitrile (NBN), selected to boost efficiency devices. The results demonstrate that NBN‐treated device exhibits enhanced light absorption, superior charge transport performance, mitigated recombination, more optimal compared additive‐free OSC. Consequently, D18:BTP‐eC9+NBN‐based binary D18:L8‐BO:BTP‐eC9+NBN‐based ternary OSC processed by solvent achieved outstanding efficiencies 20.22% 20.49%, respectively. Furthermore, universality NBN also confirmed different active layer systems. In conclusion, this work demonstrates introduction electron‐absorbing moieties ring a promising approach design BSAs, which can tune achieve highly efficient devices, certain guiding significance for development BSAs.

Language: Английский

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Hansen Parameter‐Engineered Binary Solvents Enable 19.3% Efficient Organic Solar Cells with Green Processability

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

Published: April 27, 2025

Abstract The widespread use of toxic halogenated aromatic solvents in organic solar cells (OSCs) poses severe environmental and health hazards, yet their replacement with eco‐friendly alternatives remains challenging due to poor solubility high‐performance photoactive materials. Herein, a Hansen parameters (HSPs)‐guided binary strategy is reported unlock non‐aromatic, halogen‐free solvent systems for sustainable OSCs manufacturing. By blending dihydropyran (DHP), 2‐methyl tetrahydrofuran (MeTHF), cyclopentyl methyl ether (CPME) carbon disulfide (CS 2 ), precise HSPs alignment achieved, enabling dissolution the polymer donor PM6 non‐fullerene acceptor L8‐BO. As mixture transitions from DHP:CS MeTHF:CS CPME:CS , resulting PM6:L8‐BO blend films exhibit progressively enhanced crystallinity, optimized phase separation, leading more efficient exciton improved charge transport collection reduced non‐geminate recombination, ultimately achieving power conversion efficiencies (PCEs) 13.94%, 17.15%, 18.51%, respectively. Further optimization via quaternary blended layer processed raised PCEs 19.31%, representing one highest non‐aromatic solvents. This work underscores importance employing binary‐solvent discover novel, systems, thereby advancing development OSCs.

Language: Английский

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Subtly Modulating Bay Sites of Perylene Diimide Cathode Interface Layer for High‐Performance and High‐Stability Non‐Fullerene Organic Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 26, 2024

Abstract Cathode interface layers (CILs) are crucial for optimizing the power conversion efficiency (PCE) and stability of organic solar cells (OSCs). Two small molecule CILs, PDINN‐TS PDINN‐BS developed, by modifying bay sites perylene diimide (PDI) with thieno [3,2‐b] thiophene 2,2′‐bithiophene, separately. Due to better electron‐donating capacity longer conjugate length exhibits a stronger self‐doping effect superior compatibility compared PDINN‐TS. Consequently, in PM6: Y6 OSCs, achieved an elevated PCE 16.95%, surpassing 16.66%. Meanwhile, excellent universality. When employing BTP‐eC9 PM6:L8‐BO systems, PDINN‐BS‐based device yielded 18.02% 18.95%, outperforming 17.51% 18.38%, respectively. Furthermore, tests revealed that after being stored glovebox 1500 h, retained 90% its pristine PCE, 86% showed 80% decay (T 80 ) 150 h air, 200 at 70 °C heating N 2 , 500 under 1 sun immersion, 120, 130, 380 This demonstrates displayed complicated environment. this study provides significative guidance exploitation high‐performance high‐stability OSCs.

Language: Английский

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