The Asymmetric Strategy of Small‐Molecule Materials for Organic Solar Cells DOI

Haotian Hu,

Jinfeng Ge, Zhenyu Chen

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(17)

Published: Feb. 8, 2024

Abstract The conjugated small‐molecule materials of organic solar cells have always played a crucial role in light‐harvesting, charge transport, morphology optimization, and the attainment efficient devices. advancement novel understanding underlying molecular design rules serve as driving force for furthering stable photovoltaic Among variety principles, symmetry‐breaking strategy, which is well developed 3,9‐bis(2‐methylene‐(3‐(1,1‐dicyanomethylene)‐indanone))‐5,5,11,11‐tetrakis(4‐hexylphenyl)‐dithieno[2,3‐d:2′,3′‐d’]‐s‐indaceno[1,2‐b:5,6‐b’]dithiophene (ITIC)‐series acceptors, recently demonstrates great potential acceptors donors realizing high power conversion efficiency. In this review, order to give deep insight on asymmetric are systematically summarized with structure elucidate structure‐performance relationship, packing behaviors, evolution. Not only delicate balance between open circuit voltage short‐circuit current density, but also reductions recombination non‐radiative considered play key points improving performance when molecule used host or guest materials. Finally, concise challenges outlooks provided future development application molecules strategies.

Language: Английский

19.7% efficiency binary organic solar cells achieved by selective core fluorination of nonfullerene electron acceptors DOI Creative Commons
Kerui Liu, Yuanyuan Jiang, Guangliu Ran

et al.

Joule, Journal Year: 2024, Volume and Issue: 8(3), P. 835 - 851

Published: Jan. 30, 2024

Language: Английский

Citations

149
High‐Pressure Fabrication of Binary Organic Solar Cells with High Molecular Weight D18 Yields Record 19.65 % Efficiency DOI
Hao Lu, Wenlong Liu, Guangliu Ran

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(50)

Published: Oct. 26, 2023

In this work, inspired by the principles of a pressure cooker, we utilized high-pressure method to address processing challenges associated with high molecular weight polymers. Through approach, successfully dissolved D18 in chloroform at 100 °C within pressure-tight vial. The increased steam raised boiling point and dissolving capacity chloroform, enabling creation hybrid film superior properties, including more ordered arrangement, crystallinity, extended exciton diffusion length, improved phase morphology. Organic solar cells (OSCs) based on : L8-BO prepared using achieved an outstanding power conversion efficiency 19.65 %, setting new record for binary devices date. Furthermore, was applied fabricate OSCs other common systems, leading significant enhancements device performance. summary, research introduces universal materials, ultimately resulting highest performance reported organic cells.

Language: Английский

Citations

111
Stability of organic solar cells: toward commercial applications DOI
Pengfei Ding, Daobin Yang,

Shuncheng Yang

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(5), P. 2350 - 2387

Published: Jan. 1, 2024

Organic solar cells (OSCs) have attracted a great deal of attention in the field clean energy due to their advantages transparency, flexibility, low cost and light weight. Introducing them market enables seamless integration into buildings windows, while also supporting wearable, portable electronics internet-of-things (IoT) devices. With development photovoltaic materials optimization fabrication technology, power conversion efficiencies (PCEs) OSCs rapidly improved now exceed 20%. However, there is significant lack focus on material stability device lifetime, causing severe hindrance commercial applications. In this review, we carefully review important strategies employed improve over past three years from perspectives design engineering. Furthermore, analyze discuss current progress terms air, light, thermal mechanical stability. Finally, propose future research directions overcome challenges achieving highly stable OSCs. We expect that will contribute solving problem OSCs, eventually paving way for applications near future.

Language: Английский

Citations

110
20.2% Efficiency Organic Photovoltaics Employing a π‐Extension Quinoxaline‐Based Acceptor with Ordered Arrangement DOI
Zhenyu Chen, Jinfeng Ge, Wei Song

et al.

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

Published: June 20, 2024

Organic solar cells, as a cutting-edge sustainable renewable energy technology, possess myriad of potential applications, while the bottleneck problem less than 20% efficiency limits further development. Simultaneously achieving an ordered molecular arrangement, appropriate crystalline domain size, and reduced nonradiative recombination poses significant challenge is pivotal for overcoming limitations. This study employs dual strategy involving development novel acceptor ternary blending to address this challenge. A non-fullerene acceptor, SMA, characterized by highly arrangement high lowest unoccupied orbital level, synthesized. By incorporating SMA guest in PM6:BTP-eC9 system, it observed that staggered liquid-solid transition donor facilitating crystallization ordering maintaining suitable size. Furthermore, optimized vertical morphology bimolecular recombination. As result, device achieved champion 20.22%, accompanied increased voltage, short-circuit current density, fill factor. Notably, stabilized 18.42% attained flexible devices. underscores synergistic approach integrating material innovation techniques optimizing bulk heterojunction photovoltaic performance.

Language: Английский

Citations

94
Electronic Configuration Tuning of Centrally Extended Non‐Fullerene Acceptors Enabling Organic Solar Cells with Efficiency Approaching 19 % DOI Open Access
Tainan Duan,

Wanying Feng,

Yulu Li

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(42)

Published: Aug. 26, 2023

In the molecular optimizations of non-fullerene acceptors (NFAs), extending central core can tune energy levels, reduce nonradiative loss, enhance intramolecular (donor-acceptor and acceptor-acceptor) packing, facilitate charge transport, improve device performance. this study, a new strategy was employed to synthesize featuring conjugation-extended electron-deficient cores. Among these, acceptor CH-BBQ, embedded with benzobisthiadiazole, exhibited an optimal fibrillar network morphology, enhanced crystallinity, improved generation/transport in blend films, leading power conversion efficiency 18.94 % for CH-BBQ-based ternary organic solar cells (OSCs; 18.19 binary OSCs) owing its delicate structure design electronic configuration tuning. Both experimental theoretical approaches were used systematically investigate influence on properties The modulation paves pathway engineering NFAs, propelling relevant research forward.

Language: Английский

Citations

63
Step-by-Step Modulation of Crystalline Features and Exciton Kinetics for 19.2% Efficiency Ortho-Xylene Processed Organic Solar Cells DOI Creative Commons
Bosen Zou, Weiwei Wu, Top Archie Dela Peña

et al.

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 16(1)

Published: Nov. 23, 2023

Abstract With plenty of popular and effective ternary organic solar cells (OSCs) construction strategies proposed applied, its power conversion efficiencies (PCEs) have come to a new level over 19% in single-junction devices. However, previous studies are heavily based chloroform (CF) leaving behind substantial knowledge deficiencies understanding the influence solvent choice when introducing third component. Herein, we present case where newly designed asymmetric small molecular acceptor using fluoro-methoxylated end-group modification strategy, named BTP-BO-3FO with enlarged bandgap, brings different morphological evolution performance improvement effect on host system PM6:BTP-eC9, processed by CF ortho-xylene ( o -XY). detailed analyses supported series experiments, best PCE 19.24% for green solvent-processed OSCs is found be fruit finely tuned crystalline ordering general aggregation motif, which furthermore nourishes favorable charge generation recombination behavior. Likewise, can achieved replacing spin-coating blade coating active layer deposition. This work focuses commonly met yet frequently ignored issues building blends demonstrate cutting-edge device performance, hence, will instructive other OSC works future.

Language: Английский

Citations

56
Designing A–D–A Type Fused‐Ring Electron Acceptors with a Bulky 3D Substituent at the Central Donor Core to Minimize Non‐Radiative Losses and Enhance Organic Solar Cell Efficiency DOI
Hao Lu,

Dawei Li,

Wenlong Liu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(33)

Published: May 29, 2024

Designing and synthesizing narrow band gap acceptors that exhibit high photoluminescence quantum yield (PLQY) strong crystallinity is a highly effective, yet challenging, approach to reducing non-radiative energy losses (▵E

Language: Английский

Citations

53
Embedded Host/Guest Alloy Aggregations Enable High‐Performance Ternary Organic Photovoltaics DOI Open Access
Xiaoning Wang, Jianxiao Wang, Pengchao Wang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(51)

Published: July 31, 2023

The ternary strategy has been intensively studied to improve the power conversion efficiencies of organic photovoltaics. Thereinto, location guest component plays a critical role, but few reports have devoted this concern. Hereon, distribution LA1 as acceptor in variety scenarios is reported and dominating driving forces managing operating modes are outlined. Governed by appropriate relationship compatibility, crystallinity, surface energies between host acceptors, well interfacial interactions donor dual most molecules permeate into internal phases, forming embedded host/guest alloy-like aggregations. characteristic distributions greatly optimize morphologies, maximize energy transfer, enhance exciton/charge behaviors. Particularly, PM6:IT-4F:LA1 cells afford high efficiency 15.27% with impressive fill factors (FF) over 81%. popularization studies further verify superiority LA1-involved alloy structures, Y6-family component, an outstanding 19.17% received. results highlight importance systems shed light on governing distributing guests cells.

Language: Английский

Citations

50
Thermodynamic Phase Transition of Three‐Dimensional Solid Additives Guiding Molecular Assembly for Efficient Organic Solar Cells DOI Open Access
Runnan Yu,

Rui Shi,

Zhang-Wei He

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(40)

Published: Aug. 16, 2023

Abstract Fine‐tuning the thermodynamic self‐assembly of molecules via volatile solid additives has emerged to be an effective way construct high‐performance organic solar cells. Here, three‐dimensional structured have been designed and applied facilitate formation organized molecular assembly in active layer. By means systematic theory analyses film‐morphology characterizations based on four candidates, we preselected optimal one, 4‐fluoro‐ N,N ‐diphenylaniline (FPA), which possesses good volatility strong charge polarization. The solids can induce packing layers intermolecular interactions subsequently provide sufficient space for self‐reassembly during transition process. Benefitting from optimized morphology with improved transport reduced energy disorder FPA‐processed devices, high efficiencies over 19 % were achieved. strategy inducing ordered structure represents a practical approach rational control highly efficient contributing deeper insights into structural design additives.

Language: Английский

Citations

49
Self‐Assembled Molecules with Asymmetric Backbone for Highly Stable Binary Organic Solar Cells with 19.7 % Efficiency DOI

Xueliang Yu,

Pengfei Ding, Daobin Yang

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(18)

Published: March 9, 2024

The hole-transporting material (HTM), poly (3,4-ethylene dioxythiophene) poly(styrene sulfonate) (PEDOT : PSS), is the most widely used in realization of high-efficiency organic solar cells (OSCs). However, stability PEDOT PSS-based OSCs quite poor, arising from its strong acidity and hygroscopicity. In addition, PSS has an absorption infrared region high highest occupied molecular orbital (HOMO) energy level, thus limiting enhancement short-circuit current density (J

Language: Английский

Citations

45