Recent Progress of Y6‐Derived Asymmetric Fused Ring Electron Acceptors

Advanced Functional Materials, Год журнала: 2022, Номер 32(35)

Опубликована: Июль 5, 2022

Abstract Symmetric conjugated molecules can be broken through suitable synthetic strategies to construct novel asymmetric molecules, which largely broaden the material library. In field of organic solar cells, fused‐ring electron acceptors (FREAs) with A‐DA'D‐A type backbone structure have attracted much attention and enabled power conversion efficiencies (PCE) exceeding 18%. Among them, Y6 is one most classic FREAs that derive many symmetric exhibit unique optoelectronic properties. Thus, in this review, focus on recent progress Y6‐derived containing a dipyrrolobenzothiadiazole segment, classified as following three categories: end group, central core side chain. The relationship molecular structure, properties, device performance discussed detail. Finally, future design directions challenges faced by kind photovoltaic materials are given.

Язык: Английский

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Rational compatibility in a ternary matrix enables all-small-molecule organic solar cells with over 16% efficiency

Energy & Environmental Science, Год журнала: 2021, Номер 14(7), С. 3945 - 3953

Опубликована: Янв. 1, 2021

The ternary all-small-molecule organic solar cells deliver a top-ranked power conversion efficiency of 16.28%, benefiting from the rational compatibility in theB1:BO-4Cl:Y7matrix.

Язык: Английский

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17% efficiency all-small-molecule organic solar cells enabled by nanoscale phase separation with a hierarchical branched structure

Energy & Environmental Science, Год журнала: 2021, Номер 14(11), С. 5903 - 5910

Опубликована: Янв. 1, 2021

By constructing a ternary cell with B1:BO-2Cl:BO-4Cl donor:acceptors combination, an outstanding power conversion efficiency (PCE) of 17.0% (certified to be 16.9%) has been realized for all-small-molecule organic solar cells (ASM-OSCs).

Язык: Английский

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Solvent Annealing Enables 15.39% Efficiency All‐Small‐Molecule Solar Cells through Improved Molecule Interconnection and Reduced Non‐Radiative Loss

Advanced Energy Materials, Год журнала: 2021, Номер 11(22)

Опубликована: Апрель 25, 2021

Abstract Post‐treatment is of great importance to form nanoscale phase‐separated morphology for all‐small‐molecule organic solar cells (ASM‐OSCs), while the reasons difference between thermal annealing (TA) and solvent (SVA) remain unclear. In this work, influences TA SVA (with three common solvents THF, CS 2 , CF) are systematically investigated based on BT‐2F:N3 through characterization photovoltaic performance, molecular stacking, charge transfer, etc. The results indicate that: i) with good solubility induce stronger interaction than that treatment, thus endowing molecules better mobility migrate crystallization phase separation, which leads J ‐aggregation interconnection. ii) Donor‐selectively dissolved optimizing donor domain its suitable size, improved interconnection, reduced trap states. iii) imposes a small impact N3 acceptors alleviates increment non‐radiative recombination. As result, unique multifunctions enables PCE 15.39% simultaneously voltage (0.845 V) fill factor (75.02%), much higher 14.66% treatment. Moreover, efficiency also highest value in binary ASM‐OSCs.

Язык: Английский

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Peripheral halogenation engineering controls molecular stacking to enable highly efficient organic solar cells

Energy & Environmental Science, Год журнала: 2022, Номер 15(8), С. 3519 - 3533

Опубликована: Янв. 1, 2022

The diverse molecular stacking tuned by peripheral halogens in non-fullerene acceptors (NFAs) significantly affects the physicochemical properties, film morphologies and thus power conversion efficiencies (PCEs) of organic solar cells (OSCs).

Язык: Английский

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Controlling Morphology and Voltage Loss with Ternary Strategy Triggers Efficient All-Small-Molecule Organic Solar Cells

ACS Energy Letters, Год журнала: 2023, Номер 8(2), С. 1058 - 1067

Опубликована: Янв. 23, 2023

Herein, an emerging acceptor L8-BO as the third component was combined with B1:BO-4Cl system for constructing efficient ternary all-small-molecule organic solar cells (ASM-OSCs). Theoretical, morphological, and crystallographic studies reveal that BO-4Cl possess good compatibility, resulting in alloy-like state formation of two acceptors blends. The synergistic effect is conducive to forming favorable phase separation molecular stacking promoting charge splitting extraction, which contributes simultaneously boosting short-circuit current density fill factor. Furthermore, higher lowest unoccupied orbital energy level assist ASM-OSCs achieving lower voltage loss respect binary devices. optimal 20 wt % deliver a top-level efficiency 17.10%. This work demonstrates not only morphology but also small matrix can be well-manipulated by employing strategy.

Язык: Английский

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Recent progress in all-small-molecule organic photovoltaics

Journal of Materials Chemistry A, Год журнала: 2022, Номер 10(12), С. 6291 - 6329

Опубликована: Янв. 1, 2022

This review systematically summarizes the development of all-small-molecule organic photovoltaics (SMPVs) from molecule engineering and device aspects, highlights challenges perspectives further developing SMPVs.

Язык: Английский

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NIR‐II absorbing organic nanoagents for photoacoustic imaging and photothermal therapy

BMEMat, Год журнала: 2023, Номер 1(1)

Опубликована: Янв. 30, 2023

Abstract Near‐infrared (NIR) absorbing materials hold great potential in biomedical applications, such as fluorescence imaging (FLI), photoacoustic (PAI), photodynamic therapy (PDT), and photothermal (PTT). Generally, these can be classified into two main categories based on their wavelengths: the first NIR (NIR‐I) (~650–950 nm) second (NIR‐II) (~1000–1700 materials. Due to reduced absorption scattering of NIR‐II light tissue compared NIR‐I light, enable with improved contrast deepened penetration, which is favor practical applications. Various inorganic have been developed for phototheranostics recent years. However, non‐biodegradability toxicity hinder further clinical translation. Biocompatible organic biodegradability well tailored optical property are thus more desired. In this review, we summarize advances nanoagents (ONAs) small molecules (SMs) conjugated polymers (CPs) PAI PTT show our perspectives future challenges development

Язык: Английский

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Advances in organic solar cells: Materials, progress, challenges and amelioration for sustainable future

Sustainable Energy Technologies and Assessments, Год журнала: 2024, Номер 63, С. 103632 - 103632

Опубликована: Фев. 14, 2024

Язык: Английский

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Phase separation and domain crystallinity control enable open‐air‐printable highly efficient and sustainable organic photovoltaics

InfoMat, Год журнала: 2024, Номер 6(3)

Опубликована: Янв. 31, 2024

Abstract Organic solar cells (OSCs) have emerged as a promising solution for sustainable energy production, offering advantages such low carbon footprint, short payback period, and compatibility with eco‐solvents. However, the use of hazardous solvents continues to dominate best‐performing OSCs, mainly because challenges controlling phase separation domain crystallinity in In this study, we combined solvent vapor treatment CS 2 thermal annealing precisely control PM6:M‐Cl PM6:O‐Cl systems processed eco‐solvent o‐xylene. This method resulted maximum power conversion efficiency (PCE) 18.4%, which is among highest values reported binary OSCs. Furthermore, fabrication techniques were transferred from spin coating nitrogen environment blade printing ambient air, retaining PCE 16.0%, showing its potential high‐throughput scalable production. addition, comparative analysis OSCs green was conducted reveal differences aggregation. work not only underscores significance sustainability but also lays groundwork unlocking full open‐air‐printable commercialization.

Язык: Английский

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