Side Chain Phenyl Isomerization‐Induced Spatial Conjugation for Achieving Efficient NIR‐II Phototheranostic Agents DOI Open Access

Chunbin Li,

Mengfan Yao,

Guoyu Jiang

et al.

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

Published: Nov. 9, 2024

Abstract The contradiction of near‐infrared II (NIR‐II) emission and photothermal effects limits the development phototheranostic agents (PTAs) in many emerging cutting‐edge applications. Organic aggregates present a promising opportunity for balance competitive relaxation processes through manipulation molecular structure packing. Herein, side chain phenyl isomerization‐induced spatial conjugation was proposed constructing A‐D‐A type NIR‐II PTAs with simultaneous enhancement fluorescence brightness properties. Three pairs mutually isomeric fluorophores, whose phenyls respectively located at outside ( o ‐series) inside i chain, were designed synthesized. positional isomerization endows ‐series crystals strong between group on backbone, as well interlocked planar network, which is different to that observed ‐series. Thus, all nanoparticles (NPs) exhibit red‐shifted absorption, enhanced emission, superior properties than their counterparts. A prominent member ‐series, ‐ITNP NPs, demonstrated efficacy facilitating angiography, tumor localization, imaging‐guided therapy. success this strategy paves way precise control aggregation behavior further efficient PTAs.

Language: Английский

Exploring the impact of cyano substitutions in non-fullerene acceptors for enhanced organic solar cell performance: A DFT and TD-DFT investigation DOI
Walid Taouali, Amel Azazi, Rym Hassani

et al.

Computational and Theoretical Chemistry, Journal Year: 2025, Volume and Issue: 1246, P. 115102 - 115102

Published: Feb. 3, 2025

Language: Английский

Citations

4
α‐ZnO Manipulated Growth of Ag Gird on AgNWs Enables High Conductive Flexible Electrode for Large‐Area Monolithic Organic Photovoltaics DOI Creative Commons
Zhuo Chen,

Tianyu Liu,

Irfan Ismail

et al.

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

Published: Jan. 22, 2025

Abstract The conductivity of AgNWs electrodes can be enhanced by incorporating Ag grids, thereby facilitating the development large‐area flexible organic solar cells (FOSCs). grids from vacuum evaporation offer advantages simple film formation, adjustable thickness, and unique structure. However, complex 3D multi‐component structure will exacerbate aggregation large particles, causing device short circuits. To address this issue, relationship between surface energy modification layers morphology ultrathin on is studied. amorphous ZnO (α‐ZnO) layer promotes growth Volmer–Weber (VW) to Frank–Van der Merwe (FM), reducing particle aggregation. 1 µm thick PET/AgNWs/Ag grid electrode with α‐ZnO exhibited low contact resistance high conductivity. As a result, cm 2 FOSCs achieve power conversion efficiency (PCE) 16.01%. area increased 4 9 , performance monolithic 14.70% 12.69%, showing less loss during upscaling. 8 16 modules constructed series parallel connection devices yield PCEs 14.47% 12.92%, respectively. This study offers valuable insights into constructing for highly efficient FOSCs.

Language: Английский

Citations

1
High‐Efficiency Thick Film Binary Organic Photovoltaics via Asymmetric Alkyl Chain Engineering DOI

Shengtian Zhu,

Shihao Chen, Ling Hong

et al.

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

Published: Sept. 16, 2024

Abstract The development of high‐performance organic photovoltaics (OPVs) with thick film active layers is key to moving this technology from laboratory preparation industrial production. Design and synthesis layer materials achieve a bi‐continuous interpenetrating morphology appropriate nanoscale phase separation has been demonstrated as an effective method realize high‐efficiency devices. Here, two non‐fullerene acceptors are developed compare the effect symmetric (diDT‐BO) asymmetric (DTC11‐BO) substituted alkyl chains on device performance by introducing side central core pyrrole ring. Based solubility crystallinity differences DTC11‐BO diDT‐BO, power conversion efficiencies (PCEs) 19.0% 18.1% realized D18 donor. Importantly, D18:DTC11‐BO devices 300 500 nm excellent PCEs 17.7% 16.1%, which among top‐class values for OPVs reported date. work demonstrates that tunning optimizing material design strategy OPVs.

Language: Английский

Citations

5
Electro-Photovoltaics of Grignard Metathesis-Derived Poly(propylene imine) Tetra(salicylaldimine)-co-Poly(3-hexylthiophene-2,5-diyl) Copolymer DOI Creative Commons
Morongwa E. Ramoroka, Hayelom H. Tesfay, Precious Ekwere

et al.

Materials Chemistry and Physics, Journal Year: 2025, Volume and Issue: unknown, P. 130549 - 130549

Published: Feb. 1, 2025

Language: Английский

Citations

0
17.68% Efficiency Nonhalogenated Solvent‐Processed Organic Solar Cell Modules Driven by Seed Crystal Strategy DOI

Haotian Hu,

Ze Jin, Jinfeng Ge

et al.

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

Published: Feb. 26, 2025

Abstract Organic solar cells now surpass 20% efficiency in small‐area devices, but the use of chloroform as a solvent poses industrial scalability challenges because its limited ability uniform film formation and toxicity. High‐boiling, non‐halogenated solvents are being studied alternatives, their low solubility slow evaporation complicate crystallization process. Here, study introduces seed crystal strategy by incorporating oligo (ethylene glycol)‐modified small‐molecule donors to optimize nucleation crystallization. The asymmetric BDTF‐CA2O molecule, which combines strong crystallinity rodanine group barrier glycol) chain, significantly promotes polymer donor PM6. Moreover, effectively suppresses excessive phase separation, optimizes vertical distribution, resulting enhanced exciton extraction, balanced carrier transport, reduced recombination losses. Small‐area toluene‐processed devices achieve power conversion 19.67%. In realm large‐area organic cell modules, this leads record active area 17.68% aperture 16.80% (certified at 16.26%), is highest reported for modules >10 cm 2 date. These achievements highlight potential large‐scale production efficient, modules.

Language: Английский

Citations

0
Flexible Spacer Units Enhance 3D Terpolymer Acceptors’ Optoelectronic Performance in Rigid and Flexible Devices DOI

Xiaoping Wang,

Yu Fang,

Bin Huang

et al.

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

Published: March 9, 2025

Language: Английский

Citations

0
Triplet State Suppression for Energy Loss Reduction in 20% Nonhalogenated Solvent Processed Binary Organic Solar Cells DOI Creative Commons
Ruijie Ma, Bosen Zou, Yulong Hai

et al.

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

Published: March 16, 2025

Abstract Boosting power conversion efficiency (PCE) of organic solar cells (OSCs) has been restricted by its undesirably high energy loss, especially for those nonhalogenated solvent‐processed ones. Here,a dichloro‐methoxylated terminal group in an asymmetric small molecular acceptor design, which realizes a significantly reduced non‐radiative loss (0.179 eV) compared to symmetric counterpart (0.202 eV), is reported. Consequently, the device improved up 20% PM6:BTP‐eC9‐4ClO, without sacrificing photon harvest or charge transport ability control system PM6:BTP‐eC9. Further characterizations reveal BTP‐eC9‐4ClO's blend film demonstrates suppressed triplet state formation, enabled enhanced electron delocalization. In addition, BTP‐eC9‐4ClO found be thermally stabler than BTP‐eC9, and thus providing stability, whose T80 value reaches > 7800 h under 80 °C anneal N 2 via linear extrapolation. This work represents state‐of‐the‐art performance binary OSCs with certified results (19.45%).

Language: Английский

Citations

0
Theoretically probing the asymmetric effect of donor for all-small-molecule organic solar cells DOI

Yuezhen Li,

Jin‐Hong Han,

Ying Sun

et al.

Computational and Theoretical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 115214 - 115214

Published: March 1, 2025

Language: Английский

Citations

0
Enhancing the Electrostatic Potential To Develop High-Performance Polymer Donors via a Ternary Copolymerization Strategy DOI

Xintong Shi,

Jiawei Huang,

Xiaoping Wang

et al.

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

Citations

0
Nonfullerene Acceptors with Aromatic Heterocycle Substitutions for Efficient Organic Solar Cells DOI
Junhao Zeng,

Lunbi Wu,

Zhihua Ren

et al.

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: 7(15), P. 6177 - 6186

Published: July 20, 2024

Language: Английский

Citations

2