Cited by Solid additive modulates acceptor crystallization to achieve 19.11% efficiency and high storage stability in organic solar cells

Balanced Crystallization Enhances Morphology and Efficiency in Binary Organic Solar Cells DOI

Ni Gao,

Panpan Zhang,

Zhigang Xu

et al.

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

Published: April 21, 2025

Abstract Achieving high‐performance organic solar cells (OSCs) relies heavily on precise morphology optimization, a challenging task due to the intrinsic differences in crystallization kinetics and interfacial compatibility between polymer donors small‐molecule acceptors. In this work, 2,7‐dibromonaphthalene (DBN) is introduced as an innovative solid additive that uniquely regulates both donor acceptor phases within PM6:Y6 system. Unlike conventional liquid additives, which often induce excessive Y6 crystallization, DBN achieves balanced enhancing molecular order PM6 while mitigating over‐aggregation Y6. This dual‐phase effect improves light absorption, exciton generation dissociation, charge transport, reduces recombination losses. As result, OSCs treated with achieved remarkable power conversion efficiency (PCE) of 18.5%, open‐circuit voltage ( V OC ) 0.848 V, high short‐circuit current density J SC 28.15 mA cm −2 , enhanced fill factor (FF) 77.7%. Adding anti‐reflection MgF 2 layer further boosts 19.0%, setting new benchmark for binary devices. study establishes promising regulator presents robust strategy control, advancing development photovoltaic applications.

Language: Английский

Citations

Vertical Component Distributions in Organic Solar Cells Controlled by Photocrosslinking and Layer‐by‐Layer Deposition DOI

Ryo SUZUKI, Kyohei Nakano, Makoto Miyasaka

et al.

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

Published: May 2, 2025

Abstract The vertical component distribution is investigated in bulk‐heterojunction (BHJ) type organic solar cells (OSCs) by combining photocrosslinking of donor polymers with layer‐by‐layer (LbL) deposition acceptor molecules. Different concentrations a tetradiazirine photocrosslinker controlled the crosslinker density polymer films, which turn influenced permeation behavior molecules during LbL deposition. Time‐of‐flight secondary ion mass spectrometry (TOF‐SIMS), X‐ray photoelectron spectroscopy (XPS), and grazing incidence wide‐angle scattering (GIWAXS) analyses revealed effect on materials. Increasing processing produces distinct bilayer‐like structures, each layer having different ratios. OSC performance optimized at lower crosslink densities uniformly mixed structure, while higher reduce donor‐acceptor interface, thereby decreasing power conversion efficiency from 12.6% (0.3 wt.%) to 4.48% (2.0 wt.%). These findings challenge previous assumption that molecular naturally results continuous gradients or p‐i‐n are proposed as an advantage method over traditional BHJ structures.

Language: Английский

Citations

Solubility‐Driven Acceptor Fibrilization Enables Bilayer Organic Solar Cells with Efficiency Approaching 20% DOI

Zhenmin Zhao, Sein Chung,

Liang Bai

et al.

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

Published: May 15, 2025

Abstract Modulating the fibril size of non‐fullerene acceptors has emerged as a promising approach to improve exciton dissociation and charge transport in organic solar cells. While processing solvent additives can promote acceptor aggregation, achieving controlled fibrilization remains challenging due complex donor–acceptor interactions bulk heterojunctions. Herein, solubility‐driven strategy is proposed evaluate their impact on photovoltaic performance bilayer cells, circumventing complexities mixtures. By tuning mass ratio, solubility dichloromethane modulated, leading fiber formation at different length scales during film deposition. Specifically, incorporating BTP‐eC9 into L8‐BO results larger sizes with increasing content, enhancing molecular packing thin‐film crystallinity. These structural improvements boost electron mobility extraction efficiency, yielding power conversion efficiency approaching 20% devices PM6. This effective across various combinations. findings underscore critical role fine‐tuning morphology, offering pathway for advancing solution‐processed

Language: Английский

Citations

Polypyrrole-Decorated Hybrid Anode Interlayer for Enhancing Efficiency and Stability of Non-Fullerene Solar Cells DOI

Jiafeng Zhang,

Lianjie Zhang, Junwu Chen

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(13), P. 7742 - 7750

Published: July 1, 2024

Language: Английский

Citations

Solid additive modulates acceptor crystallization to achieve 19.11% efficiency and high storage stability in organic solar cells DOI

Luye Cao,

Hengyuan Zhang,

Jingwen Du

et al.

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 1, 2024

Language: Английский

Citations