“Double‐Gene” Small Molecule as Guest Component Promotes the Efficiency of Organic Solar Cells Beyond 19.5%

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

Abstract Introduction of a guest component into the active layer is simple yet effective approach to enhance performance organic solar cells (OSCs). Despite various components successfully employed in OSCs, efficient require deliberate design and ingenious inspiration, which still remains big challenge for developing high OSCs. In this work, we propose concept “structural gene” engineering create new “double‐gene” small molecule (L‐DBDD) by simply combining structures both donor PM6 acceptor L8‐BO. L‐DBDD inherit features acceptor, naturally acts as bridge between donor/acceptor (D/A) interfaces strengthen D/A interactions compatibility. Incorporation can facilitate rapid charge dissociation simultaneously optimize molecular packing transport. Consequently, ternary OSC based on : L8‐BO blend achieves top power conversion efficiency (PCE) 19.51 %, significantly suppressing binary control device (PCE=18.52 %). These results demonstrate that combination provides meaningful guideline component‐assisted highly

Language: Английский

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The Value of Device Characterization for the Optimization of Organic Solar Cells

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

Published: Feb. 27, 2025

Abstract In addition to achieving record efficiencies of ≈20%, organic photovoltaics (OPV) has overcome several additional challenges. These include researching environmentally friendly solvents, improving stability, yield, and scaling up industrial standards in terms cell size mass production. However, identifying the optimal candidates from countless material combinations determining exact process parameters is like looking for a needle haystack. Process optimization usually comprises phases such as device fabrication, measurement, evaluation, concluding with experimental design next round making. Given extent parameter space, this can be extremely time‐consuming. algorithms mainly based on mathematical models become more prevalent automated laboratories, question arises how physics domain knowledge characterization samples into algorithmic process. To address question, benchmark function created using solar data originating hundreds cells prepared different processing conditions. This used test compare approaches quantify under which conditions physical improve speed an laboratory.

Language: Английский

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Layer‐by‐Layer Processed Pseudo‐Bilayer Heterojunctions Advance the Performance of Organic Solar Cells

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

Published: April 14, 2025

Abstract Recent progress in organic (semiconductor) solar cells (OSCs) has led to power conversion efficiencies (PCEs) reaching 20%, with predictions that 25% may be possible. Additional PCE improvements, significant efforts have been made address the engineering challenges traditionally limited OSCs small area devices often poor temporal stability. Layer‐by‐layer (LbL) processing of active layers emerged as a promising approach tackle these challenges, numerous state‐of‐the‐art processed using LbL reported. In this Perspective, recent developments are developed enhancing OSC efficiency and stability, particular focus on working mechanisms pseudo‐bilayer heterojunctions (P‐BHJ) practical aspects fabricating high‐performance techniques. By providing insights into resultant film morphology, it is hoped contribute ongoing improve efficiency, scalability explore their potential for broader applications such example indoor light harvesting or agrivoltaics.

Language: Английский

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Dual Side Chain Functionalization of Small Molecule Acceptors Affords High‐Performance Organic Solar Cells With Refined Blend Morphology

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

Published: April 21, 2025

Abstract Regulating blend morphology in photoactive films is essential for enhancing the power conversion efficiency (PCE) of organic solar cells (OSCs). However, achieving precise control over remains a significant challenge due to difficulty simultaneously controlling thermodynamic and kinetic parameters that govern formation. In this study, series new small‐molecule acceptors (SMAs) employing dual side chain functionalization strategy designed incorporates trifluoromethyl (CF 3 ) phenyl (Ph) groups: SMA‐CH , SMA‐CF (with CF group), SMA‐Ph‐CF both groups). This approach successfully enables delicate tuning development high‐performance OSCs (PCE = 18.5%). enhances compatibility SMAs with hydrophobic D18 polymer donor, promoting formation intermixed donor/acceptor domains efficient charge generation. Meanwhile, improves SMA aggregation crystallinity, facilitating strong interconnected assembly transport. As result, binary based on D18:SMA‐Ph‐CF achieve significantly higher PCE 18.5%, compared 14.3% D18:SMA‐CH 16.5% D18:SMA‐CF OSCs. These results highlight importance optimizing

Language: Английский

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Steric hindrance induced low exciton binding energy enables low‐driving‐force organic solar cells

Aggregate, Journal Year: 2024, Volume and Issue: 5(5)

Published: July 2, 2024

Abstract Exciton binding energy ( E b ) has been regarded as a critical parameter in charge separation during photovoltaic conversion. Minimizing the of materials can facilitate exciton dissociation low‐driving force organic solar cells (OSCs) and thus improve power conversion efficiency (PCE); nevertheless, diminishing with deliberate design principles remains significant challenge. Herein, bulky side chain steric hindrance structure was inserted into Y‐series acceptors to minimize by modulating intra‐ intermolecular interaction. Theoretical experimental results indicate that hindrance‐induced optimal interaction enhance molecular polarizability, promote electronic orbital overlap between molecules, delocalized transfer pathways, thereby resulting low . The conspicuously reduced obtained Y‐ChC5 pinpoint modulation detrimental effects on low‐driving‐force OSCs, achieving remarkable PCE 19.1% over 95% internal quantum efficiency. Our study provides new rationale reduce

Language: Английский

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Tuning local charge polarization of covalent organic frameworks for enhanced photocatalytic uranium (VI) reduction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 499, P. 156483 - 156483

Published: Oct. 6, 2024

Language: Английский

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Fluorine/bromine/selenium multi-heteroatoms substituted dual-asymmetric electron acceptors for o-xylene processed organic solar cells with 19.12% efficiency

Science China Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 15, 2024

Abstract The development of high-performance near-infrared (NIR) absorbing electron acceptors is a major challenge in achieving high short-circuit current density ( J SC ) to increase power conversion efficiency (PCE) organic solar cells (OSCs). Herein, three new multi-heteroatomized Y-series (bi-asy-Y-Br, bi-asy-Y-FBr, and bi-asy-Y-FBrF) were developed by combining dual-asymmetric selenium-fused core brominated end-groups with different numbers fluorine substitutions. With gradually increasing fluorination, exhibit red-shift absorption. Among them, bi-asy-Y-FBrF presents planar molecular geometry, the maximum average electrostatic potential, minimum dipole moment, which are conducive intramolecular packing charge transport. Moreover, D18:bi-asy-Y-FBrF active layer higher crystallinity, more suitable phase separation, reduced recombination compared D18:bi-asy-Y-Br D18:bi-asy-Y-FBr blends. Consequently, among theses binary OSCs, device achieves PCE 15.74% an enhanced 26.28 mA cm −2 , while obtains moderate 15.04% highest open-circuit voltage V OC 0.926 V. Inspired its complementary absorption NIR-absorbing BTP-eC9 as acceptor, bi-asy-Y-Br introduced into D18:BTP-eC9 construct ternary further boosted 19.12%, top values for reported green solvent processed OSCs.

Language: Английский

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Achieving 19.3%-efficiency binary organic solar cells via synergistically dual-phases morphology control

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 506, P. 160133 - 160133

Published: Jan. 1, 2025

Language: Английский

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Conjugated π-Extension of Small Molecular Nonfullerene Acceptor for Efficient Ternary Organic Solar Cells with an Efficiency of 19.10%

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

In this study, we have successfully incorporated a small molecular acceptor, Y-LC, with conjugated π-extension as secondary acceptor in the PM6:BTP-eC9-based organic photovoltaics. The performance of device was significantly promoted from 18.45% binary system PM6:BTP-eC9 to over 19% ternary minimal Y-LC loading. This enhancement can be attributed alloy-like structures acceptors and optimized active layer morphology, which leads improved hole electron mobilities, thereby suppressing charge recombination, finally resulting higher photocurrent solar cells. Furthermore, complementary absorption is observed PM6 BTP-eC9, broaden spectrum photoactive enable more photons sunlight absorbed. Additionally, facilitates efficient transfer donor by forming cascade energy levels between BTP-eC9. These advantages collectively contribute superior obtained work also highlights that adoption nonfullerene suitable π-extensions minor additive photovoltaics powerful approach for achieving state-of-the-art

Language: Английский

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Coordination-induced bridging polymer enables favorable interface compatibility and vertical phase distribution in efficient organic solar cells

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

Language: Английский

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