Harnessing the Structure‐Performance Relationships in Designing Non‐Fused Ring Acceptors for Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)

Published: Feb. 17, 2023

Abstract The prerequisite for commercially viable organic solar cells (OSC) is to reduce the efficiency‐stability‐cost gap. Therefore, cost of materials should be reduced by minimizing synthetic steps, yet maintaining molecular planarity and efficiencies achieved fused ring acceptors (FRA). In this respect, developing non‐fused (NFRA) with suitable functionalization favor conformational effective packing beneficial cost‐effective. Presently, power conversion efficiency (PCE) NFRAs around 16 %, lower than 19 % FRAs. Despite their potential, a thorough understanding structural design necessary efficient OSCs. This article pays special attention concept developed in last years analyzed approach toward improvement, an important step technological application.

Language: Английский

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Recent Progress in π-Conjugated Polymers for Organic Photovoltaics: Solar Cells and Photodetectors

Progress in Polymer Science, Journal Year: 2023, Volume and Issue: 143, P. 101711 - 101711

Published: June 25, 2023

Language: Английский

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24.96%‐Efficiency FACsPbI₃ Perovskite Solar Cells Enabled by an Asymmetric 1,3‐Thiazole‐2,4‐Diammonium

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(15)

Published: March 1, 2023

Abstract Surmounting complicated defects at the electron transport layer (ETL) and perovskite interface plays a non‐trivial role in improving efficiency stability of solar cells (PSCs). Herein, an asymmetric modification strategy (AIMS) is developed to passivate from both SnO 2 ETL buried surface via incorporating 1,3‐thiazole‐2,4‐diammonium (TDA) into /perovskite interface. Detailed experimental calculated results demonstrate that N3 (the nitrogen atom bonding imine) TDA preferentially cures free hydroxyl (OH), oxygen vacancy ( V O ), Sn‐related on surface, while N1 vinyl) more inclined Pb 2+ I − related surface. As result, TDA‐modified FACsPbI 3 PSC yields champion power conversion (PCE) 24.96% with gratifying open‐circuit voltage oc ) 1.20 V. In addition, optimized PSCs exhibit charming air‐operational unencapsulated device sustaining 97.04% its initial PCE after storage air conditions for 1400 h. The encapsulated maintains 90.21% maximum point tracking 500

Language: Английский

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Molecular Packing and Dielectric Property Optimization through Peripheral Halogen Swapping Enables Binary Organic Solar Cells with an Efficiency of 18.77%

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(31)

Published: April 17, 2023

Abstract Peripheral halogen regulations can endow non‐fullerene acceptors (NFAs) with enhanced features as organic semi‐conductors and further boost efficient solar cells (OSCs). Herein, based on a remarkable molecular platform of CH14 more than six halogenation positions, preferred NFA CH23 is constructed by synergetic swapping both central end units, rendering the overall enlarged dipole moment, packing density thus relative dielectric constant. Consequently, CH23‐based binary OSC reaches an excellent efficiency 18.77% due to its improved charge transfer/transport dynamics, much better that 17.81% for control CH14. This work demonstrates great potential achieving state‐of‐the‐art OSCs delicately regulating formula these newly explored CH‐series NFAs.

Language: Английский

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Insight Into Designing High‐Performance Polythiophenes for Reduced Urbach Energy and Nonradiative Recombination in Organic Solar Cells

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

Published: April 18, 2024

Abstract In the pursuit of high‐efficiency polythiophene (PT) organic solar cells (OSCs), a critical challenge is reduction nonradiative recombination. This study comprehensively explores polydithienylthiazolothiazole (PTTz)‐based PT terpolymers: PTTz‐Tz and PTTz‐TzT, in which it demonstrate that molecular structure alterations greatly influence aggregation kinetics orientation these polymers. Specifically, PTTz‐TzT achieves rapid ordering during spin coating, effectively suppressing excessive polymer facilitating appropriate phase separation upon mixing with acceptor. Meanwhile, inherently adopts face‐on orientation, resulting more structured π–π stacking vertical direction after acceptor integration, compared to intrinsic edge‐on PTTz‐Tz. These factors collectively contribute lower Urbach energy substantial recombination PTTz‐TzT‐based OSCs, culminating high photovoltaic conversion efficiency (PCE) exceeding 16%. Furthermore, prominent PCE 19.11% obtained by via ternary blend strategy, among highest values reported for OSCs. investigation underscores significance PT‐based polymers, especially regarding recombination, offers novel insights designing high‐performance donors.

Language: Английский

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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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18.9% Efficiency Ternary Organic Solar Cells Enabled by Isomerization Engineering of Chlorine‐Substitution on Small Molecule Donors

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(30)

Published: April 17, 2023

Abstract Ternary organic solar cells (OSCs) represent an efficient and facile strategy to further boost the device performance. However, selection criteria rational design of third guest small molecule (SM) material still remain less understood. In this study, two new SM donor isomers, with α‐chlorinated thiophene (αBTCl) β‐chlorinated (βBTCl) as side chains, are systematically designed, synthesized incorporated a component in PM6:L8‐BO binary blends. It is noticed that introducing donors has extended absorption photo‐active layer, induced desired distribution vertically enhanced crystallinity reduced recombination process, leading increased short‐circuit current ( J SC ) improved fill factor. Moreover, due synergetic suppressed nonradiative loss preferable morphology, ternary OSCs feature improves open‐circuit voltage V OC ). Consequently, impressive champion power conversion efficiency 18.96% 18.55% achieved by αBTCl‐based βBTCl‐based OSCs, respectively. Furthermore, record 17.46% obtained 330 nm thickness OSCs. This study demonstrates molecular isomerization can be promising approach for construct high‐performance simultaneous enhancement all photovoltaic parameters.

Language: Английский

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Near-Infrared Electron Acceptors with Cyano-Substituted 2-(3-Oxo-2,3-dihydroinden-1-ylidene)malononitrile End-Groups for Organic Solar Cells

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(6), P. 2641 - 2651

Published: May 17, 2023

Near-infrared (NIR) electron acceptors are critical components for constructing organic solar cells (OSCs). Herein, we report a set of A-DA′D-A-type with end-groups cyano-substituted 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (CN-IC), which possesses the strongest electron-withdrawing ability among reported to date. An optical bandgap as low 1.29 eV was obtained CN-IC end-groups, is decreased by 0.12 respect that reference acceptor. Meanwhile, deep-lying frontier molecular orbital energy levels were maintained in these acceptors. These advantages endow broad light-harvesting range and capacity match prevalent polymer donors. Consequently, OSCs power conversion efficiency 18.1% obtained. results suggest huge potential NIR

Language: Английский

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Ordering structure control of polythiophene-based donors for High-Efficiency organic solar cells

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 474, P. 145531 - 145531

Published: Aug. 19, 2023

Language: Английский

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Carboxylate‐Containing Poly(thiophene vinylene) Derivative with Controlled Molecular Weights for High‐Performance Intrinsically‐Stretchable Organic Solar Cells

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(50)

Published: Aug. 7, 2023

Abstract Owing to their simple chemical structures and straightforward synthesis, poly(thiophene vinylene) (PTV) derivatives are promising types of polymer donors for organic solar cells (OSCs). However, the structural rigidity PTVs results in formation films with poor mechanical properties, which limits application intrinsically stretchable (IS)‐OSCs. Here, new carboxylate‐containing developed tuned molecular weight (MW) (PETTCVT‐X, X = L, M, H) realize efficient mechanically durable IS‐OSCs. The crystallinity increases progressively increasing MW, leading enhanced hole mobility suppressed charge recombination OSCs. Moreover, both stretchability electrical properties increase significantly owing tie‐chains that connect isolated crystalline domains. Consequently, OSCs featuring a PTV highest MW (PETTCVT‐H) exhibit power conversion efficiency (PCE, 15.3%) crack‐onset strain (COS, 7.1%) among series, compared lower values PETTCVT‐L (PCE 9.7% COS 1.3%) PETTCVT‐M‐based 12.5% 3.7%). Therefore, IS‐OSCs employing PETTCVT‐H present initial PCE (10.1%) (strain at 80% (retaining PCE) 16%).

Language: Английский

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