An Acceptor–Donor–Acceptor Structured Nano‐Aggregate for NIR‐Triggered Interventional Photoimmunotherapy of Cervical Cancer

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

Published: Aug. 3, 2024

Compared with conventional therapies, photoimmunotherapy offers precise targeted cancer treatment minimal damage to healthy tissues and reduced side effects, but its efficacy may be limited by shallow light penetration the potential for tumor resistance. Here, an acceptor-donor-acceptor (A-D-A)-structured nanoaggregate is developed dual phototherapy, including photodynamic therapy (PDT) photothermal (PTT), triggered single near-infrared (NIR) light. Benefiting from strong intramolecular charge transfer (ICT), A-D-A-structured nanoaggregates exhibit broad absorption extending NIR region effectively suppressed fluorescence, which enables deep efficient conversion (η = 67.94%). A suitable HOMO-LUMO distribution facilitates sufficient intersystem crossing (ISC) convert ground-state oxygen (

Language: Английский

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Rational Construction and Efficient Regulation of Stable and Long-Lived Charge-Separation State in Fullerene Materials

Accounts of Materials Research, Journal Year: 2024, Volume and Issue: 5(4), P. 426 - 437

Published: March 12, 2024

ConspectusPhotoinduced charge separation (CS) ensures efficient light-energy conversion. The stable and long-lived charge-separation state (CSs) is beneficial for suppressing recombination facilitating the of highly reduction-active electrons or oxidation-active holes to participate in subsequent photoreactions. Accordingly, construction states has been an important goal researchers. These results highlighted importance fullerene materials. Characterized by their well-defined structures exceptional electronic properties, fullerenes have emerged as prominent electron acceptors. energy levels excited-state transfer features can be modulated altering carbon cage (selecting diverse carbon-cage configurations), embedding clusters (metallofullerenes), modifying functional groups on (fullerene additive reactions). Importantly, low reorganization makes them promising materials constructing CSs. Therefore, researchers commonly employ acceptors design photoelectric investigate fundamental mechanisms. primary task construct CSs through system extend lifetime according appropriate regulations. However, critical challenges stem from inadequate comprehension CS patterns, unsuitable choices, lack simple strategies regulation. our research approach, which originates inherent principles CS, aims explore regulating derivatives.In this Account, we systematically summarize following three aspects (1) Construction thermodynamically We established a mathematical correlation between external HOMO levels, enabling rapid straightforward prediction stability Stable successfully constructed increasing donor, lowering LUMO acceptor, direction (2) Develop kinetic regulation lifetime. found that meta- ortho-substituted configuration determines localization, effectively slowing thus prolonging Additionally, findings indicate restricting molecular conformational changes Strategies regulation, including redox introduction steric hindrance, were subsequently designed. (3) Potential applications primarily elucidated photovoltaics photocatalysis (hydrogen production NAD+ regeneration). effective photogenerated carrier transport, are photovoltaic photocatalytic reactions. Finally, aiming prolonged lifetime, more universal strategies, broader state, propose some perspectives further applied fullerene-based

Language: Английский

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Two Completely Non‐Fused Ring Acceptors Working in an Alloy‐Like Model for Efficient and Stable Organic Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(17)

Published: March 13, 2024

Abstract Simple chemical structure and simplified synthesis process of active layer materials are critical for advancing the practical application organic solar cells. Herin, two completely non‐fused ring electron acceptors BTZT‐2Cl BTZT‐4Cl developed. exhibits an enhanced absorption band, increases electrostatic potential differences with D18, improves crystallinity molecular packing properties. Consequently, binary device based on displays a markedly improved efficiency 14.12%, compared to BTZT‐2Cl‐based device, which only achieves moderate 11.25%. More importantly, alloy‐like can be formed by incorporating small amount high miscibility compatibility BTZT‐2Cl. The ternary blend more compact packing, efficient exciton dissociation, extended charge carrier lifetime due formation structure. decent 15.41% superior thermal stability T 80 over 1600 h after being aged at 65 °C. These results establish it as most among devices both voltage. This study demonstrates simple material design strategy high‐performance optimization techniques, applications in OSC field.

Language: Английский

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Precisely Regulating Intermolecular Interactions and Molecular Packing of Nonfused‐Ring Electron Acceptors via Halogen Transposition for High‐Performance Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(34)

Published: June 5, 2024

The structure of molecular aggregates is crucial for charge transport and photovoltaic performance in organic solar cells (OSCs). Herein, the intermolecular interactions aggregated structures nonfused-ring electron acceptors (NFREAs) are precisely regulated through a halogen transposition strategy, resulting noteworthy transformation from 2D-layered to 3D-interconnected packing network. Based on 3D pathway, binary ternary devices deliver outstanding power conversion efficiencies (PCEs) 17.46 % 18.24 %, respectively, marking highest value NFREA-based OSCs.

Language: Английский

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Biaxially Conjugated Materials for Organic Solar Cells

ACS Nano, Journal Year: 2023, Volume and Issue: 18(1), P. 136 - 154

Published: Dec. 26, 2023

Organic solar cells (OSCs) represent one of the most important emerging photovoltaic technologies that can implement energy conversion efficiently. The chemical structure organic semiconductors deployed in active layer OSCs plays a critical role performance and chemical/physical stability relevant devices. With innovation semiconductors, especially nonfullerene acceptors (NFAs), have been promoted rapidly recent years, with state-of-the-art power efficiencies (PCEs) exceeding 19.5%. Compared other photovoltaics like perovskite, shortcoming mainly lies high nonradiative recombination loss. However, photocurrent density is superior owing to easy modulation NFA band gap toward near-infrared region. In these regards, effort further boost PCE achieve milestone >21% should be devoted reducing loss while broadening absorption band. Developing biaxially extended conjugated structures has provided potential solution goals. Herein, we summarize design rules progress materials for OSCs. descriptions are divided into two major categories, i.e., polymers NFAs. For p-type polymers, focus on biaxial conjugation some representative building blocks, e.g., polythiophene, triphenylamine, quinoxaline. Whereas n-type large planes normal direction presented. We also elaborate strategies NFAs modification site at either π-core or side-group. general structure–property relationships retrieved within materials, short-wavelength Finally, provide an outlook highly efficient, stable, industry-compatible

Language: Английский

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Binary All‐polymer Solar Cells with a Perhalogenated‐Thiophene‐Based Solid Additive Surpass 18 % Efficiency

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(9)

Published: Jan. 3, 2024

Abstract Morphological control of all‐polymer blends is quintessential yet challenging in fabricating high‐performance organic solar cells. Recently, solid additives (SAs) have been approved to be capable tuning the morphology polymer: small‐molecule improving performance and stability devices. Herein, three perhalogenated thiophenes, which are 3,4‐dibromo‐2,5‐diiodothiophene (SA‐T1), 2,5‐dibromo‐3,4‐diiodothiophene (SA‐T2), 2,3‐dibromo‐4,5‐diiodothiophene (SA‐T3), were adopted as SAs optimize cells (APSCs). For blend PM6 PY‐IT, benefitting from intermolecular interactions between thiophenes polymers, molecular packing properties could finely regulated after introducing these SAs. In situ UV/Vis measurement revealed that assist morphological character evolution blend, leading their optimal morphologies. Compared as‐cast device : all SA‐treated binary devices displayed enhanced power conversion efficiencies 17.4–18.3 % with obviously elevated short‐circuit current densities fill factors. To our knowledge, PCE 18.3 for SA‐T1‐treated ranks highest among APSCs date. Meanwhile, universality SA‐T1 other demonstrated unanimously improved performance. This work provide a new pathway realizing APSCs.

Language: Английский

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Impact of Linker Engineering in Core‐Linked Dimeric Acceptors for High‐Performance Organic Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(41)

Published: July 3, 2024

Abstract The dimerization of small molecule acceptors (SMAs) is a promising strategy for enhancing the long‐term stability and power conversion efficiency (PCE) organic solar cells (OSCs). However, reported DSMAs are primarily limited to end‐linked molecular configurations, highlighting need further exploration various dimer architectures. Herein, development two distinct core‐linked dimerized SMAs (DYF‐V DYF‐E) with tailored linker structures (vinylene ethynyl, respectively), achieving high‐performance OSCs (PCE = 18.53%). Interestingly, subtle change in results markedly different properties photovoltaic performances acceptors. DYF‐E an ethynyl exhibits more twisted backbone conformation mitigated aggregation property compared DYF‐V, inducing desirable blend morphologies polymer donor including high crystallinity, face‐on oriented packing structures, well‐intermixed domains. Thus, DYF‐E‐based exhibit PCE (17.02%), which significantly outperforms DYF‐V‐based 9.98%). Furthermore, ternary based on achieve higher 18.53%. this study highlights significance selecting appropriate producing OSCs.

Language: Английский

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The Critical Isomerization Effect of Core Bromination on Nonfullerene Acceptors in Achieving High‐Performance Organic Solar Cells with Low Energy Loss

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

Published: Dec. 30, 2024

Highly efficient nonfullerene acceptors (NFAs) for organic solar cells (OSCs) with low energy loss (E

Language: Английский

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Molecular Design of Dimeric Acceptor Enables Binary Organic Solar Cells with 19.78% Efficiency and Enhanced Stability

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

Published: March 3, 2025

Abstract The development of organic solar cells (OSCs) with high efficiency and stability is highly desirable to facilitate its commercial applications. Although dimeric acceptors distinctive advantages have been widely studied, high‐performance binary OSCs based on such molecules rarely achieved. In this work, a new acceptor (DY‐FL) constructed by simultaneously optimizing the linking sites units, as well building blocks. Thanks effective molecular design, DY‐FL provides improved stacking for fibrous morphology favorable exciton/charge dynamics. Consequently, DY‐FL‐based render superior power conversion (PCE) 19.78%, representing record‐breaking acceptors. Importantly, devices display significantly enhanced operational under external stimuli light heat, in comparison their small molecule (Y‐F)‐based counterpart. These findings highlight significance blocks modes, providing insight into design strategy state‐of‐the‐art OSCs.

Language: Английский

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Efficient and stable inverted structure organic solar cells utilizing surface-modified SnO2 as the electron transport layer

Nano Energy, Journal Year: 2023, Volume and Issue: 118, P. 109032 - 109032

Published: Oct. 27, 2023

Language: Английский

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