Morphology Optimization by Non‐Halogenated and Twisted Volatile Solid Additive for High‐Efficiency Organic Solar Cells DOI Open Access

Linze Wu,

Maojin Yun,

Jianqiang Qin

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 20, 2024

Abstract Recently, volatile solid additives have attracted tremendous interest in the field of organic solar cells (OSCs), which can effectively improve device efficiency without sacrificing reproducibility and stability device. However, structure reported is onefold its working mechanism needs to be further investigated. Herein, a novel non‐halogenated twisted additive 1,4‐diphenoxybenzene (DPB) employed optimize morphology active layer OSCs. The properties DPB, layer, carrier dynamics behaviors been systematically investigated through theoretical calculations, situ ex spectroscopy, grazing‐incidence wide‐angle X‐ray scattering (GIWAXS), small‐angle (GISAXS) measurement, as well ultrafast spectroscopy technology. results reveal that DPB selectively interacts with acceptor Y6, thus forms optimized increased molecular crystallinity, tight packing, favorable phase separation. As result, devices deliver remarkable power conversion (PCE) 19.04%, highest value for D18‐Cl:N3 system date. These demonstrate has broad prospects preparation highly efficient OSCs, providing experimental guidance development high‐performance additives.

Language: Английский

Over 19.2% Efficiency of Layer‐By‐Layer Organic Photovoltaics by Ameliorating Exciton Dissociation and Charge Transport DOI Open Access

Hongyue Tian,

Hang Zhou, Lu Zhang

et al.

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

Published: Jan. 26, 2025

Abstract Layer‐by‐layer (LbL) organic photovoltaics (OPVs) are fabricated with polymer PM1 as donor and small molecule L8‐BO acceptor by employing sequential spin‐coating technology. The BTP‐eC9 PTAA deliberately selected for individually incorporating into layer layer, resulting in the power conversion efficiency (PCE) increased from 18.22% to 19.23%. improvement of performance is attributed synergistically short circuit current density ( J SC ) 27.78 mA cm −2 fill factor (FF) 78.23%. introduction can promote photogenerated exciton dissociation, especially excitons near anode. Meanwhile, molecular crystallinity also enhanced appropriate layer. incorporation provide hole transport channels effectively improve holes generated self‐dissociation L8‐BO, FFs 77.40% synergistic effects layers result a 19.23% PCE optimized LbL‐OPVs. This work demonstrates that there great room hierarchically optimize achieving highly efficient

Language: Английский

Citations

3
Asymmetrified Benzothiadiazole‐Based Solid Additives Enable All‐Polymer Solar Cells with Efficiency Over 19 % DOI
Tianqi Chen,

Yanyi Zhong,

Tainan Duan

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(1)

Published: Aug. 24, 2024

Disordered polymer chain entanglements within all-polymer blends limit the formation of optimal donor-acceptor phase separation. Therefore, developing effective methods to regulate morphology evolution is crucial for achieving morphological features in organic solar cells (APSCs). In this study, two isomers, 4,5-difluorobenzo-c-1,2,5-thiadiazole (SF-1) and 5,6-difluorobenzo-c-1,2,5-thiadiazole (SF-2), were designed as solid additives based on widely-used electron-deficient benzothiadiazole unit nonfullerene acceptors. The incorporation SF-1 or SF-2 into PM6 : PY-DT blend induces stronger molecular packing via interaction, leading continuous interpenetrated networks with suitable phase-separation vertical distribution. Furthermore, after treatment SF-2, exciton diffusion lengths films are extended over 40 nm, favoring charge transport. asymmetrical characterized by an enhanced dipole moment, increases power conversion efficiency (PCE) PY-DT-based device 18.83 % due electrostatic interactions. Moreover, a ternary strategy boosts PCE SF-2-treated APSC 19 %. This work not only demonstrates one best performances APSCs but also offers approach manipulate using rational-designed additives.

Language: Английский

Citations

12
Breaking 20% Efficiency of all‐Polymer Solar Cells via Benzo[1,2‐d:4,5‐d′]Bisthiazole‐Based Terpolymer Donor Strategy for Fine Morphology Optimization DOI Open Access

Wuke Qiu,

Chentong Liao,

Yinfeng Li

et al.

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

Published: March 15, 2025

Abstract Developing high‐performance all‐polymer solar cells (all‐PSCs) remains a challenge due to the difficulty in controlling morphology of polymer blends. In this study, benzo[1,2‐d:4,5‐d′]bisthiazole (BBTz) is incorporated into PM6 main chain create series terpolymer donors, leveraging entropy increase and superior miscibility with acceptors modulate blend morphology. The introduction BBTz broadened absorption range, enhanced film crystallinity, significantly improved donor‐acceptor through its low dipole moment high electrostatic potential. This facilitated formation nanofiber structures active layer, thus optimizing As result, PBZ‐10:PY‐IT‐based device achieved an impressive power conversion efficiency (PCE) 19.06%. Incorporation PBQx‐TF binary can further improve morphology, charge transport, exciton lifetime, dissociation, collection, as well suppressed recombination, finally leading record‐breaking PCE 20.04% for all‐PSCs date. findings demonstrate effectiveness strategy enhancing all‐PSC performance. By molecular design component selection, approach provides viable pathway achieving higher supports advancement renewable energy technologies.

Language: Английский

Citations

1
Methylated naphthalene additives with various melting and boiling points enable a win–win scenario of optimizing both cost and efficiency of polymer solar cells DOI
Li Tao, Xiaoying Zhang, Qi Chen

et al.

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Readily available 2-methylnaphthalene (2-MN) was demonstrated as a volatile solid additive to achieve good win–win situation of optimizing among efficiency, cost and environmental issues.

Language: Английский

Citations

0
Synergistically Halogenated and Methoxylated Thiophene Additive Enables High‐Performance Organic Solar Cells DOI Open Access
Xue Jiang, Peihao Huang,

Kaihuai Tu

et al.

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

Published: Jan. 7, 2025

Abstract Morphology control plays a key role for improving efficiency and stability of bulk heterojunctions (BHJ) organic solar cells (OSCs). Halogenation methoxylation are two separate ways successfully adopted in additives morphology optimization. In this work, these strategies combined together. A series halogenated methoxylated thiophenes is designed synthesized as volatile to the evolution BHJ morphology. Specifically, addition 2,5‐diiodo‐3,4‐dimethoxythiophene (MT‐I) prominently improves performance photostability OSCs. Computational simulations reveal noncovalent interactions MT‐I with active layer materials that corresponds inhibition excessive aggregation behavior PM6 Y6 during film‐forming process, facilitating favorable phase separation enhanced molecular stacking. Consequently, PM6:Y6‐based binary OSCs treatment achieves high PCE 17.93%. Furthermore, demonstrates broad feasibility across diverse high‐efficiency OSCs, leading superior photovoltaic (PCE over 18%). This study offers valuable guidance design application high‐performance future endeavors.

Language: Английский

Citations

0
Enhancing Organic Solar Cell Efficiency with Ester-Based Quinoxaline Non-Fullerene Acceptors in Ternary Blends DOI
Zhixin Liu,

Chunguang Zhu,

Jianpeng Xu

et al.

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110801 - 110801

Published: Feb. 1, 2025

Language: Английский

Citations

0
Ternary Blend Organic Photovoltaics with High Efficiency and Stability Through Energy Transfer and Molecular Packing Induced by an A‐D‐A Small Molecule DOI Creative Commons
Bin Chang,

Chung‐Hao Chen,

Atsushi Yabushita

et al.

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

Published: April 21, 2025

Abstract A novel A‐D‐A type small molecule (DTP‐2EH‐IO2Cl) incorporating dithiophenepyrrole (DTP) core with indene‐dione (IO2Cl) side chain an intermediate band gap and rigid structure is incorporated into polymer donor PM6 one of the three A−DA′D−A acceptor—L8‐BO, BTP‐eC9 or Y6—for ternary‐blend organic photovoltaics (OPVs). The third component DTP‐2EH‐IO2Cl induces not only energy transfer but also stronger molecular packing acceptors, resulting in a larger coherence length enhanced absorption that enhances devices’ power conversion efficiencies (PCE) thermal stability. PCE values champion devices PM6:L8‐BO, PM6:BTP‐eC9, PM6:Y6 are 19.2, 18.3, 17.6%, respectively, versus 16.5, 15.8, 15.4% for their corresponding binary blend devices, displaying relative increases from 14 to 16%. stability (T 80 ) PM6:L8‐BO: ternary device dramatically 568 h 57 PM6:L8‐BO device. These enhancements can be attributed effectiveness as increasing light through inducing intermolecular providing effective way tune morphology boost both OPVs.

Language: Английский

Citations

0
1,4-Dimethoxynaphthalene as a Solid Additive for Improved Photovoltaic Performance in Organic Solar Cells DOI
Yuanyuan Liu, Shiqi Ye, Huiqiu Deng

et al.

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Morphology optimization of blend films is an essential strategy to enhance the photovoltaic performance organic solar cells (OSCs). Additive engineering effective for fine-tuning active layer morphology. Given limited efforts and achievements in designing synthesizing liquid additives, new solid additives manipulate morphology layers have gained widespread attention. Herein, 1,4-dimethoxynaphthalene (DMNA), with merits simple structure, low cost, ecofriendliness, successfully incorporated as a novel additive optimize OSCs based on D18-Cl:N3. The relationship between different DMNA contents device has been investigated. It found that can be effectively regulated by DMNA, leading enhanced molecular packing films, which favors exciton dissociation, charge transfer, suppression recombination. As result, 18.61% power conversion efficiency (PCE) obtained D18-Cl:N3 binary devices better than 17.21% PCE control device. This primarily due simultaneous increase short-circuit current density fill factor. Furthermore, general applicability confirmed other systems. These results suggest presents potential prospects regulating bulk heterojunction toward high-performance high-stability OSCs.

Language: Английский

Citations

0
Enhancing the efficiency of non-fullerene organic solar cells by using a volatilizable solid additive system DOI Creative Commons
Walia Binte Tarique, Ashraful Hossain Howlader, Shahriyar Safat Dipta

et al.

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

Published: Jan. 1, 2025

The morphology of the active layer mostly affects photovoltaic efficiency organic solar cells (OSCs).

Language: Английский

Citations

0
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

0