A Mixed‐Pure Planar Heterojunction Structure of Active Layers for Efficient Sequential Blade‐Coating Organic Solar Cells DOI Open Access

Yilin Wang,

Yabing Tang,

Yanni Ouyang

et al.

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

Published: Nov. 7, 2024

Precise modulating the vertical structure of active layers to boost charge transfer is an effective way achieve high power conversion efficiencies (PCEs) in organic solar cells (OSCs). Herein, efficient OSCs with a well-controlled are realized by rapid film-forming method combining low boiling point solvent and sequential blade-coating (SBC) technology. The results grazing incident wide-angle X-ray scattering measurement show that component distribution varied changing processing solvent. Novel characterization technique such as tilt resonant soft used test films, demonstrating dichloromethane (DCM)-processed film truly planar heterojunction. devices chloroform (CF) processed upper layer increased mixed phase region compared these toluene (TL) or -DCM-, which beneficial for improving generation achieving superior PCE 17.36%. Despite significant morphological varies, DCM-processed perform slightly lower 16.66%, highest value heterojunction devices, higher tolerance. This work proposes solvent-regulating optimize through SBC technology, provides practical guidance optimization active-layer microstructure.

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

3
Understanding photochemical degradation mechanisms in photoactive layer materials for organic solar cells DOI Creative Commons
Jianhua Han, Han Xu, Sri Harish Kumar Paleti

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(14), P. 7426 - 7454

Published: Jan. 1, 2024

Over the past decades, field of organic solar cells (OSCs) has witnessed a significant evolution in materials chemistry, which resulted remarkable enhancement device performance, achieving efficiencies over 19%. The photoactive layer OSCs play crucial role light absorption, charge generation, transport and stability. To facilitate scale-up OSCs, it is imperative to address photostability these electron acceptor donor materials, as their photochemical degradation process remains challenge during photo-to-electric conversion. In this review, we present an overview development emphasizing aspects chemical stability behavior that are linked OSCs. Throughout each section, highlight pathways for link degradation. We also discuss existing interdisciplinary challenges obstacles impede photostable materials. Finally, offer insights into strategies aimed at enhancing future directions developing photo-active layers, facilitating commercialization

Language: Английский

Citations

15
A Fluorinated Imide‐Functionalized Arene Enabling a Wide Bandgap Polymer Donor for Record‐Efficiency All‐Polymer Solar Cells DOI
Mingwei An, Qian Liu,

Sang Young Jeong

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 15, 2024

Abstract All‐polymer solar cells (all‐PSCs) present compelling advantages for commercial applications, including mechanical durability and optical thermal stability. However, progress in developing high‐performance polymer donors has trailed behind the emergence of excellent acceptors. In this study, we report a new electron‐deficient arene, fluorinated bithiophene imide (F‐BTI) its donor SA1, which two fluorine atoms are introduced at outer β ‐positions thiophene rings BTI to fine‐tune energy levels aggregation resulting polymers. SA1 exhibits deep HOMO level −5.51 eV, wide bandgap 1.81 eV suitable miscibility with acceptor. Polymer chains incorporating F‐BTI result highly ordered π–π stacking favorable phase‐separated morphology within all‐polymer active layer. Thus, : PY‐IT‐based all‐PSCs exhibit an efficiency 16.31 % stability, is further enhanced record value 19.33 (certified: 19.17 %) by constructing ternary device. This work demonstrates that offers effective route materials improved optoelectronic properties, will change scenario terms stable all‐PSCs.

Language: Английский

Citations

9
Tetrahydrofuran Processable Organic Solar Cells with 19.45% Efficiency Realized by Introducing High Molecular Dipole Unit Into the Terpolymer DOI Open Access

Chentong Liao,

Xiaopeng Xu,

Tongyan Yang

et al.

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

Published: Oct. 14, 2024

Developing organic solar cells (OSCs) processable with halogen-free, non-aromatic solvents is crucial for practical applications, yet challenging due to the limited solubility of most photoactive materials. This study introduces high-performance terpolymers in tetrahydrofuran (THF) by incorporating dithienophthalimide (DPI) into PM6 backbone. DPI extends absorption band, lowers HOMO levels, and improves THF film crystallinity through its large dipole moment effect. Optimal PBD-10:L8-BO devices processed achieved a competitive power conversion efficiency (PCE) 18.79%, approaching chloroform-processed (19.04%). By introducing PBTz-F as second donor, ternary OSCs reached an impressive 19.45% PCE when THF. improvement stems from enhanced photon generation, improved morphology, better charge transport, longer exciton lifetimes, efficient dissociation collection, suppressed recombination. These PCEs 18.79% binary blend OSCs, respectively, represent highest reported efficiencies solvents. work demonstrates significant progress eco-friendly OSC fabrication, paving way more sustainable commercially viable photovoltaic technologies.

Language: Английский

Citations

8
CF3-Functionalized Side Chains in Nonfullerene Acceptors Promote Electrostatic Interactions for Highly Efficient Organic Solar Cells DOI
Yongjoon Cho, Zhe Sun, Guoping Li

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

The advent of next-generation nonfullerene acceptors (NFAs) has propelled major advances in organic solar cells (OSCs). Here we report an NFA design incorporating CF

Language: Английский

Citations

7
Transport Resistance Dominates the Fill Factor Losses in Record Organic Solar Cells DOI Creative Commons

Chen Wang,

Roderick C. I. MacKenzie, Uli Würfel

et al.

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

Published: March 5, 2025

Abstract Organic photovoltaics (OPV) are a promising solar cell technology well‐suited to mass production using roll‐to‐roll processes. The efficiency of lab‐scale cells has exceeded 20% and considerable attention is currently being given understanding minimizing the remaining loss mechanisms preventing higher efficiencies. While recent improvements partly owed reducing non‐radiative recombination losses at open circuit, low fill factor ( FF ) due significant transport resistance becoming Achilles heel OPV. term refers voltage light intensity‐dependent charge collection in low‐mobility materials. In this perspective, it demonstrated that even highest organic (OSCs) reported to‐date have performance can be attributed lead high losses. A closer look material properties influencing provided. How experimentally characterize quantify described by providing easy follow instructions. Furthermore, causes theory behind detailed. particular, relevant figures merit (FoMs) different viewpoints on integrated. Finally, we outline strategies followed minimize these future cells.

Language: Английский

Citations

1
Highly electronegative additives suppress energetic disorder to realize 19.19 % efficiency binary organic solar cells DOI

Luye Cao,

Hengyuan Zhang,

Xiaoyang Du

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 129, P. 110016 - 110016

Published: July 17, 2024

Language: Английский

Citations

5
End‐extended Conjugation Strategy to Reduce the Efficiency‐Stability‐Mechanical Robustness Gap in Binary All‐Polymer Solar Cells DOI
Xu Zhang, Huanhuan Gao,

Yuanyuan Kan

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 10, 2024

Concurrently achieving high efficiency, mechanical robustness and thermal stability is critical for the commercialization of all-polymer solar cells (APSCs). However, APSCs usually demonstrate complicated morphology, primarily attributed to polymer chain entanglement which has a detrimental effect on their fill factors (FF) morphology stability. To address these concerns, an end-group extended acceptor, PY-NFT, was synthesized studied. The analysis showed tightly ordered molecular packing mode favorable phase separation formed. PM6 : PY-NFT-based device achieved exceptional PCE 19.12 % (certified as 18.45 %), outperforming control PY-FT devices (17.14 %). This significant improvement highlights record-high binary APSCs. aging study revealed that PY-NFT blend exhibited excellent morphological stability, thereby superior retaining 90 initial efficiency after enduring stress (65 °C) 1500 hours. More importantly, film outstanding ductility with crack onset strain 24.1 %. Overall, rational chemical structure innovation, especially conjugation extension strategy trigger appropriate stable key improved robust

Language: Английский

Citations

5
Molecular Control of the Donor/Acceptor Interface Suppresses Charge Recombination Enabling High‐Efficiency Single‐Component Organic Solar Cells DOI Creative Commons
Yao Li, Richard A. Pacalaj, Yongmin Luo

et al.

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

Published: Aug. 28, 2024

Abstract Single‐component organic solar cells based on double cable polymers have achieved remarkable performance, with DCPY2 reaching a high efficiency of over 13%. In this study, is further optimized an 13.85%, maintaining fill factor (FF) without compromising the short circuit current. Despite its intermixed morphology, shows reduced recombination rate compared to their binary counterpart (PBDB‐T:Y‐O6). This slower in attributed wavefunction overlap delocalized charges, by spatially separating donor and acceptor units alkyl linker, thereby restricting pathways. Adding 1,8‐diiodooctane (DIO) into facilitating aggregation, allowing free charges become more delocalized. The DIO‐assisted aggregation (5% DIO) evidenced increased pseudo‐pure domain size Y‐O6. Fine molecular control at donor/acceptor interface double‐cable polymer achieves non‐geminate under efficient charge generation, mobility, carrier lifetime, achieving superior performance. Nevertheless, FF still limited relatively low mobility blend, suggesting potential for improvement through enhanced higher‐dimensional packing material.

Language: Английский

Citations

4
Asymmetrically Substituted Quinoxaline Enabling Conformation-Locked Polymer Donors toward High-Performance Polymer Solar Cells DOI
Hongru Chen,

Jiongjiong Zhang,

Qingyuan Wang

et al.

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

Published: Jan. 2, 2025

Polymer donors are a key component for high-performance polymer solar cells (PSCs), and the emergence of giant acceptors presents challenge in designing accessible that improve miscibility device performance. In this study, we developed series quinoxaline (Qx)-based polymers by introducing monosubstituted conjugated side chains employing noncovalent conformational locks to maintain backbone rigidity. This approach minimizes steric hindrance enhances molecular rigidity while simplifying synthesis, potentially reducing cost Qx-based materials. Among these polymers, F atom-substituted PF-2F demonstrated superior planarity due CH···F hydrogen bonds, thereby improving crystallinity with tethered dimeric (DY2). As result, binary PSC based on achieved PCE 17.5%, which increased 18.3% after addition additional donor D18 construct ternary PSCs. work highlights how asymmetric modulate photovoltaic properties, providing new insights rational design materials complement acceptors.

Language: Английский

Citations

0