Regiospecific Incorporation of Fluorine Atoms in Polythiophene Derivatives for Efficient Organic Solar Cells DOI
Tan Ngoc‐Lan Phan, Jin‐Woo Lee, Trieu Hoang‐Quan Nguyen

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(46), P. 63861 - 63870

Published: Nov. 9, 2024

Derivatives of polythiophene (PT) have garnered considerable attention in organic solar cells (OSCs) because their relatively uncomplicated molecular structures and cost-effective synthesis. Herein, we developed two regioisomeric fluorinated PT donors, PEI3T-FITVT PEI3T-FOTVT, to realize efficient OSCs. PEI3T-FOTVT are strategically designed with different fluorine atom arrangements on thiophene-vinyl-thiophene (TVT) units. Notably, possesses enhanced backbone planarity induced by F···S noncovalent interactions between constituent building blocks. Consequently, the higher aggregation crystalline properties leads a 2.5-fold increase hole mobility over (from 1.4 × 10–4 3.6 cm2 V–1 s–1). Furthermore, exhibits domain purity than PEI3T-FITVT, leading faster charge transport reduced recombination OSC devices. These characteristics lead power conversion efficiency 14.4% for PEI3T-FOTVT-based OSCs, compared 12.9% PEI3T-FITVT-based

Language: Английский

Isomerization Engineering of Solid Additives Enables Highly Efficient Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Active Layer DOI
Yawei Miao, Yanna Sun,

Wentao Zou

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 20, 2024

Morphology control is crucial in achieving high-performance organic solar cells (OSCs) and remains a major challenge the field of OSC. Solid additive an effective strategy to fine-tune morphology, however, mechanism underlying isomeric solid additives on blend morphology OSC performance still vague urgently requires further investigation. Herein, two based pyridazine or pyrimidine as core units, M1 M2, are designed synthesized explore working OSCs. The smaller steric hindrance larger dipole moment facilitate better π-π stacking aggregation M1-based active layer. M1-treated all-small-molecule OSCs (ASM OSCs) obtain impressive efficiency 17.57%, ranking among highest values for binary ASM OSCs, with 16.70% M2-treated counterparts. Moreover, it imperative investigate whether isomerization engineering works state-of-the-art polymer D18-Cl:PM6:L8-BO-based devices achieve exceptional 19.70% (certified 19.34%), work provides deep insights into design clarifies potential optimizing device through additives.

Language: Английский

Citations

34
Simultaneous enhancement of efficiency, stability and stretchability in binary polymer solar cells with a three-dimensional aromatic-core tethered tetrameric acceptor DOI Creative Commons
Yang Bai, Saimeng Li, Qingyuan Wang

et al.

National Science Review, Journal Year: 2025, Volume and Issue: 12(3)

Published: Jan. 21, 2025

Polymer solar cells (PSCs) leverage blend films from polymer donors and small-molecule acceptors (SMAs), offering promising opportunities for flexible power sources. However, the inherent rigidity crystalline nature of SMAs often embrittle donor in constructed bulk heterojunction structure. To address this challenge, we improved stretchability by designing synthesizing a tethered giant tetrameric acceptor (GTA) with increased molecular weight that promotes entanglement individual SMA units. The key to design is using tetraphenylmethane as linking core create three-dimensional high C2 symmetry structure, which successfully regulates their aggregation relaxation behavior. With GTA acceptor, its PM6 exhibit significantly stretchability, nearly 150% increase crack onset strain value compared PM6:Y6. Moreover, PSCs achieve an efficiency up 18.71% demonstrate outstanding photostability, maintaining >90% initial conversion after operating over 1000 hours. Our findings specifically aligning weights more closely those counterparts, can enhanced without compromising morphological stability or device efficiency.

Language: Английский

Citations

6
Triadic Halobenzene Processing Additive Combined Advantages of Both Solvent and Solid Types for Efficient and Stable Organic Solar Cells DOI
Jaeyeong Park, Seonghun Jeong, Zhe Sun

et al.

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

Published: Sept. 3, 2024

Solvent additives with a high boiling point (BP) and low vapor pressure (VP) have formed key handle for improving the performance of organic solar cells (OSCs). However, it is not always clear whether they remain in active-layer film after deposition, which can negatively affect reproducibility stability OSCs. In this study, an easily removable solvent additive (4-chloro-2-fluoroiodobenzene (CFIB)) BP VP introduced, behaving like volatile solid that be completely removed during device fabrication process. In-depth studies CFIB addition into D18-Cl donor N3 acceptor validate its dominant non-covalent intermolecular interactions through effective electrostatic interactions. Such phenomena improve charge dynamics kinetics by optimizing morphology, leading to enhanced D18-Cl:N3-based devices power conversion efficiency 18.54%. The CFIB-treated exhibits exceptional thermal (T80 lifetime = 120 h) at 85 °C compared CFIB-free device, because morphological robustness evolving no residual film. features combination advantages (easy application) (high volatility) additives, demonstrating great potential use commercial mass production

Language: Английский

Citations

16
Open-air, green-solvent processed organic solar cells with efficiency approaching 18% and exceptional stability DOI

Thi Le Huyen,

Zhe Sun, Seoyoung Kim

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(19), P. 7435 - 7444

Published: Jan. 1, 2024

H75-2F, a fluorinated cathode material, boosts organic solar cell efficiency, achieving 19.44% PCE in controlled conditions and 17.78% with open-air green-solvent processing, while offering strong thermal moisture stability.

Language: Английский

Citations

10
Rhodanine Substitution of Asymmetric Nonfullerene Acceptors for High-Performance Organic Solar Cells DOI
Qingbin Li, Yang Bai, Shuai Jiang

et al.

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

Published: Jan. 29, 2025

Asymmetric substitution is acknowledged as a straightforward yet potent approach for the optimization of small molecule acceptors (SMAs), thereby enhancing power conversion efficiency (PCE) organic solar cells (OSCs). In this work, we have successfully engineered and synthesized novel asymmetric SMA, designated Y6-R, which features rhodanine-terminated inner side-chain. devices with PM6 polymer donor, Y6-R demonstrated an impressive PCE 18.62% open-circuit voltage (Voc) 0.863 V, short-circuit current (Jsc) 27.89 mA cm-2, fill factor (FF) 77.35%, much higher than that symmetric SMA Y6-based (16.84%). The superior performance PM6:Y6-R can be attributed to combination factors, including upshifted LUMO energy levels, more desired exciton dissociation, collection, extraction capability, well reduced recombination suppressed Eloss. addition, molecules promote coaggregation behaviors along endowing stronger ordered crystallinity blend films. Our findings underscore effectiveness rhodanine-substitution, representative "A" units, SMAs in fine-tuning behavior efficiency.

Language: Английский

Citations

2
Polythiophene and its derivatives for all-polymer solar cells DOI

Qingqing Bai,

Yanxiang Cheng, Wei Wang

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(27), P. 16251 - 16267

Published: Jan. 1, 2024

We review polythiophene and its derivative (PT)-based polymer donors for all-PSCs, focusing on material design, morphology optimization strategies, the selection design of acceptors that complement their properties.

Language: Английский

Citations

7
Understanding the Nonradiative Charge Recombination in Organic Photovoltaics: From Molecule to Device DOI

Yibo Kong,

Hongzheng Chen, Lijian Zuo

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 19, 2024

Abstract Organic photovoltaics (OPVs) have made significant strides with efficiencies now exceeding 20%, positioning them as potential competitors to inorganic solar technologies. One of the most critical challenges toward this goal is severe open‐circuit voltage ( V oc ) loss caused by nonradiative charge recombination (NRCR). Herein, review comprehensively summarizes NRCR mechanisms and suppression techniques OPVs across various scales from molecule device. Specifically, origins in a single are first summarized, molecular design principles high photoluminescence quantum yield reviewed following Marcus theory. Next, effect aggregation on reviewed, well processing strategies modulate film packing for suppression. Furthermore, progresses avoidance pathways mediated transfer states triplet donor:acceptor bulk heterojunctions tracked. Besides, interfacial optimization device structure maximize electroluminescent efficiency presented. Finally, several curtailing high‐performance outlined. Therefore, shows an insightful perspective understand mitigate at multi‐scales, poised provide clear roadmap next breakthrough OPVs.

Language: Английский

Citations

6
Nanoscale Balance of Energy Loss and Quantum Efficiency for High-Efficiency Polythiophene-Based Organic Solar Cells DOI

Zhe Sun,

Hayoung Ma,

Thi Le Huyen

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

Polythiophene donors offer scalable and cost-effective solutions for the organic photovoltaic industry. A thorough understanding of structure–property–performance relationship is essential advancing polythiophene-based solar cells (PTOSCs) with high power conversion efficiencies (PCEs). Herein, we develop two polythiophene donors─PTTz-CN PTTz-CN(T2)─to verify energy loss–quantum efficiency relationship. The strong preaggregation property PTTz-CN improves quantum in spite nonradiative recombination loss, while PTTz-CN(T2) chains are weakly preaggregated, causing low efficiency, accompanied by loss though. Synergistically optimized achieved judiciously mixing PTTz-CN(T2), delivering outstanding PCEs up to 16.4% PTOSC system 19.6% an archetype a high-performing OSC containing optimal PTTz-CN:PTTz-CN(T2) composition. We highlight significance desirable balance between via molecular interaction tuning improve performances.

Language: Английский

Citations

6
Solid additive for manipulating the lamellar-stacking phases of donor and π-stacking phases of acceptor and its recycling implementation in organic solar cells DOI
Yeo Hyung Kim, Seoyoung Kim, Seunglok Lee

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158329 - 158329

Published: Dec. 1, 2024

Language: Английский

Citations

5
Energy Disorder Suppression, Charge Transport Channel Establishment by Integrating Four‐Arm Donor Molecule for High‐Performance Organic Solar Cells DOI Open Access

Wentao Miao,

Yirui Liu, Yao Wu

et al.

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

Published: March 12, 2025

Abstract Organic solar cells (OSCs) typically exhibit large energy disorders due to the complicated blend morphology, which is one of important factors in limiting improvement power conversion efficiencies (PCEs). Herein, two new cross‐shaped donor molecules, BTCl‐4R and BT‐4R, featured with central benzodithiophene (BDT) cores flanked four π‐bridges hexylrhodanine end groups are developed, introduced into OSCs as a third component optimize packing behaviors reduce disorder. By blending classical PM6:L8‐BO system, outstanding PCE 20.03% low disorder 32 meV achieved, higher order lowers trap density inter‐connected morphology facilitates establishment more charge transport channels. This study demonstrates significant potential multi‐arm molecules constructing high‐performance OSCs.

Language: Английский

Citations

0