Organic Solar Cell with Efficiency of 20.49% Enabled by Solid Additive and Non‐Halogenated Solvent DOI
Longfei Liu, Hui Li,

Juxuan Xie

et al.

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

Published: April 26, 2025

Abstract Recently, benzene‐based solid additives (BSAs) have emerged as pivotal components in modulating the morphology of blend film organic solar cells (OSCs). However, since almost all substituents on BSAs are weak electron‐withdrawing groups and contain halogen atoms, study with non‐halogenated strong has received little attention. Herein, an additive strategy is proposed, involving incorporation benzene ring. An effective BSA, 4‐nitro‐benzonitrile (NBN), selected to boost efficiency devices. The results demonstrate that NBN‐treated device exhibits enhanced light absorption, superior charge transport performance, mitigated recombination, more optimal compared additive‐free OSC. Consequently, D18:BTP‐eC9+NBN‐based binary D18:L8‐BO:BTP‐eC9+NBN‐based ternary OSC processed by solvent achieved outstanding efficiencies 20.22% 20.49%, respectively. Furthermore, universality NBN also confirmed different active layer systems. In conclusion, this work demonstrates introduction electron‐absorbing moieties ring a promising approach design BSAs, which can tune achieve highly efficient devices, certain guiding significance for development BSAs.

Language: Английский

A dendritic hexamer acceptor enables 19.4% efficiency with exceptional stability in organic solar cells DOI Creative Commons
Tao Jia, Tao Lin, Yang Yang

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 20, 2025

Language: Английский

Citations

2
Achieving Finely Optimized Morphology and Highly Efficient Layer-by-Layer Organic Solar Cells via Fluorinated Quinoxaline-Based Polymer Additives DOI
Yujie Wu,

Xingjian Dai,

Chentong Liao

et al.

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

Published: April 7, 2025

Vertical phase-separated active layer morphology is essential for organic solar cells (OSCs), which can be effectively achieved through layer-by-layer (LbL) processing, enabling independent optimization of donor and acceptor layers. Here, we present a novel strategy to optimize the D18/L8-BO-based OSCs by incorporating polyfluoroquinoxaline-type polymer additives. Three quinoxaline-based polymers with varying fluorination contents, namely, P2FQx, P3FQx, P4FQx, were synthesized evaluated. Although these showed limited performance as standalone materials in bulk heterojunction (BHJ) devices, their use additives LbL-OSCs significantly enhanced device efficiency. These promoted D18 aggregation, L8-BO penetration, facilitated formation vertically interpenetrating donor/acceptor network. Among additives, P2FQx demonstrated best performance, an optimized achieving champion power conversion efficiency (PCE) 20.13% well high fill factor (FF) 80.13%. Our results highlight potential rationally designed address morphology-related challenges provide pathway further development high-performance scalable photovoltaic devices.

Language: Английский

Citations

2
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
Achieving 20% Toluene-Processed Binary Organic Solar Cells via Secondary Regulation of Donor Aggregation in Sequential Processing DOI Creative Commons
Yufei Wang,

Chuanlin Gao,

Wen Lei

et al.

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: April 1, 2025

Sequential processing (SqP) of the active layer offers independent optimization donor and acceptor with more targeted solvent design, which is considered most promising strategy for achieving efficient organic solar cells (OSCs). In SqP method, favorable interpenetrating network seriously depends on fine control bottom swelling. However, choice solvent(s) both have been mostly based a trial-and-error manner. A single often cannot achieve sufficient yet not excessive swelling, has long difficulty in high OSCs. Herein, two new isomeric molecules are introduced to fine-tune nucleation crystallization dynamics that allows judicious over swelling layer. The strong non-covalent interaction between molecule materials provides an excellent driving force optimize swelling-process. Among them, dipole moment promotes earlier PM6 extended time during SqP, improving bulk morphology vertical phase segregation. As result, champion efficiencies 17.38% 20.00% (certified 19.70%) achieved PM6/PYF-T-o (all-polymer) PM6/BTP-eC9 devices casted by toluene solvent.

Language: Английский

Citations

1
Preparation of Dual-Asymmetric Acceptors via Selenium Substitution Combined with Terminal Group Optimization Strategy for High Efficiency Organic Solar Cells DOI
Haoran Yin, Yongjie Cui, Dong Chen

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

Improving both the open-circuit voltage (VOC) and short-circuit current density (JSC) through development of photovoltaic materials to achieve high power conversion efficiency (PCE) is critical a significant challenge for organic solar cells (OSCs). Here, we designed novel dual-asymmetric acceptors A-SSe-TCF A-SSe-LSF by simultaneously asymmetrically regulating backbone terminal groups investigated their synergistic effects on performance in comparison with monoasymmetric acceptor A-SSe-4F. The exhibit broader spectral absorption larger half-molecule dipole moment differences, which favored enhancement JSC reduction energy loss (Eloss). Among binary blends, PM6:A-SSe-TCF exhibits superior phase separation, vertical distribution morphology, more ordered π-π stacking compared PM6:A-SSe-LSF PM6:A-SSe-4F. As result, OSCs based achieved higher PCE 18.53% VOC due suppressed nonradiative recombination enhanced charge extraction capabilities. Furthermore, incorporating as third component, PM6:L8-BO:A-SSe-TCF-based device achieves champion 19.73% without account decrement Eloss. strategy provides new insights into molecular design improvement OSCs.

Language: Английский

Citations

0
Morphology Regulation Is Achieved by Volatile Solid Additives in Halogen-Free Solvents to Fabricate Efficient Polymer Solar Cells DOI
Yanglong Hou,

Qiao Wang,

Yifan Yang

et al.

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

Published: Feb. 26, 2025

The meticulous control of micromorphology in high power conversion efficiency (PCE) polymer solar cells (PSCs) typically relies on halogenated solvents, which pose serious threats to both environmental sustainability and human health. In this work, a green efficient method for fabricating PCE PSCs with halogen-free solvents is developed. By introducing volatile solid additives 1-bromo-2,6-dichlorobenzene (DIB) 1-bromo-2,3,5-trichlorobenzene (TIB) into toluene the aggregation behaviors PM6:L8-BO were meticulously regulated, forming distinct fibrous morphology; detail, vertical direction exhibited pattern acceptor enrichment at top donor bottom, leads enhanced exciton dissociation efficiency, improved charge transport performance, significantly reducing recombination, finally PCEs, as maximum PCEs 18.56 17.67%, respectively, are notably higher than those devices without additives. Furthermore, since can be completely removed from active layer, additive-treated exhibit superior morphology photovoltaic stability. This therefore, unveils straightforward environmentally friendly preparing PSCs, instrumental facilitating large-scale commercialization PSC technology.

Language: Английский

Citations

0
Lowering Toxicity of Solvent in Organic Solar Cells Manufacturing for 20% Efficiency DOI

Rui Zeng,

Qianqian Zhang, Wenkai Zhong

et al.

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

Published: April 23, 2025

Abstract Thin film organic photovoltaics (OPVs) aim to harness solar energy environmentally friendly, highly efficient, and cost‐effective means, thereby offering a sustainable solution for production ecological preservation. Efforts are undertook optimize engineering preparation technology OPV devices mini‐modules, through the development of low‐ecological‐impact solvent processing method. A newly developed strategy employing benign o ‐xylene (OXY) with synergistic dual additives (DIM DIB) achieved an optimal power conversion efficiency (PCE) 20.0% ( J SC 26.6 mA cm −2 , V OC 0.935 V, FF 80.3%) alongside exceptional stability metrics (82%–1500h). The mini‐module processed optimized TCE:OXY (1:3 v/v) demonstrated scalable performance reaching 17.6% (18.4 2 ), representing highest in safe based OPVs. Suitable microscale patterns contributed broader range receiving angles, enabling more flexible installation geometries building‐integrated applications.

Language: Английский

Citations

0
High Efficiency Non‐Halogenated Solvent Processed Organic Solar Cells Through Synergistic Effects of Layer‐by‐Layer and Solid Additive DOI
Hui Li, Longfei Liu,

Jiangkai Yu

et al.

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

Published: April 24, 2025

Abstract In the field of organic solar cells (OSCs), bulk heterojunction (BHJ) structure is most widely used. On contrary, layer‐by‐layer (LBL) gives a p‐i‐n separation where donor close to transparent electrode while acceptor reflective electrode, which shows be an ideal for OSCs. this work, volatile solid additives 2,5‐dibromoprazine (DBP) and 2‐bromine‐5‐iodopyrazine (BIP) are introduced regulate morphology LBL active layers. Comprehensive analysis reveals that DBP BIP can promote stronger molecular packing crystallinity BTP‐eC9, resulting in higher charge mobility, more efficient separation, suppressed bimolecular recombination significantly improve device filling factor (FF), especially devices. Consequently, by combining engineering additive BIP, outstanding power conversion efficiency (PCE) 19.63% based on PM1/BTP‐eC9 achieved further applied PM1/BTP‐eC9:eC9‐2Cl ternary system, PCE exceeded 20%. The results provide comprehensive insights into synergistic effect high‐performance photovoltaics.

Language: Английский

Citations

0
Organic Solar Cell with Efficiency of 20.49% Enabled by Solid Additive and Non‐Halogenated Solvent DOI
Longfei Liu, Hui Li,

Juxuan Xie

et al.

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

Published: April 26, 2025

Abstract Recently, benzene‐based solid additives (BSAs) have emerged as pivotal components in modulating the morphology of blend film organic solar cells (OSCs). However, since almost all substituents on BSAs are weak electron‐withdrawing groups and contain halogen atoms, study with non‐halogenated strong has received little attention. Herein, an additive strategy is proposed, involving incorporation benzene ring. An effective BSA, 4‐nitro‐benzonitrile (NBN), selected to boost efficiency devices. The results demonstrate that NBN‐treated device exhibits enhanced light absorption, superior charge transport performance, mitigated recombination, more optimal compared additive‐free OSC. Consequently, D18:BTP‐eC9+NBN‐based binary D18:L8‐BO:BTP‐eC9+NBN‐based ternary OSC processed by solvent achieved outstanding efficiencies 20.22% 20.49%, respectively. Furthermore, universality NBN also confirmed different active layer systems. In conclusion, this work demonstrates introduction electron‐absorbing moieties ring a promising approach design BSAs, which can tune achieve highly efficient devices, certain guiding significance for development BSAs.

Language: Английский

Citations

0