A Pyrene‐Fused Dimerized Acceptor for Ternary Organic Solar Cells with 19% Efficiency and High Thermal Stability

Angewandte Chemie International Edition, Год журнала: 2023, Номер 63(1)

Опубликована: Ноя. 21, 2023

A pyrene-fused dimerized electron acceptor has been successfully synthesized and subsequently incorporated as the third component in ternary organic solar cells (OSCs). Diverging from traditional acceptors with a linear configuration, this novel displays distinctive "butterfly-like" structure, comprising two Y-acceptors wings fused pyrene-based backbone. The extended π-conjugated backbone electron-donating nature of pyrene enable new to show low solubility, elevated glass transition temperature (Tg ), low-lying frontier energy levels. Consequently, seamlessly integrates into OSCs, enhancing transporting properties, reducing non-radiative voltage loss, elevating open-circuit voltage. These merits have enabled OSCs an exceptional efficiency 19.07%, marked improvement compared 17.6% attained binary OSCs. More importantly, high Tg exhibited by helps stabilize morphology photoactive layer thermal-treated at 70 °C, retaining 88.7% over 600 hours. For comparison, experience decline 73.7% after same duration. results indicate that design incorporation unit is promising strategy development for

Язык: Английский

---

Step-by-Step Modulation of Crystalline Features and Exciton Kinetics for 19.2% Efficiency Ortho-Xylene Processed Organic Solar Cells

Nano-Micro Letters, Год журнала: 2023, Номер 16(1)

Опубликована: Ноя. 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.

Язык: Английский

---

Rigid- and soft-block-copolymerized conjugated polymers enable high-performance intrinsically stretchable organic solar cells

Joule, Год журнала: 2023, Номер 8(1), С. 204 - 223

Опубликована: Дек. 1, 2023

Язык: Английский

---

Design of Star‐Shaped Trimer Acceptors for High‐Performance (Efficiency > 19%), Photostable, and Mechanically Robust Organic Solar Cells

Advanced Energy Materials, Год журнала: 2024, Номер 14(8)

Опубликована: Янв. 2, 2024

Abstract High power conversion efficiency (PCE), long‐term stability, and mechanical robustness are prerequisites for the commercial applications of organic solar cells (OSCs). In this study, a new star‐shaped trimer acceptor (TYT‐S) is developed high‐performance OSCs with PCE 19.0%, high photo‐stability ( t 80% lifetime = 2600 h under 1‐sun illumination), crack‐onset strain (COS) 21.6% achieved. The isotropic molecular structure TYT‐S affords efficient multi‐directional charge transport electron mobility. Furthermore, its amorphous prevents formation brittle crystal‐to‐crystal interfaces, significantly enhancing properties OSC. As result, TYT‐S‐based demonstrate higher (19.0%) stretchability (COS 21.6%) than linear‐shaped (TYT‐L)‐based (PCE 17.5% COS 6.4%) small‐molecule (MYT)‐based 16.5% 1.3%). addition, increased size TYT‐S, relative to that MYT dimer (DYT), suppresses diffusion kinetics molecules, substantially improving photostability OSCs. Finally, effectively potential intrinsically stretchable (IS)‐OSCs constructed. IS‐OSCs exhibit device (strain at 31%) 14.4%.

Язык: Английский

---

Recent progress and prospects of dimer and multimer acceptors for efficient and stable polymer solar cells

Chemical Society Reviews, Год журнала: 2024, Номер 53(9), С. 4674 - 4706

Опубликована: Янв. 1, 2024

This review summarizes the recent progress, key design principles and prospects of dimer multimer acceptors for developing polymer solar cells (PSCs) with high efficiency long-term stability.

Язык: Английский

---

Strengthening the Hetero‐Molecular Interactions in Giant Dimeric Acceptors Enables Efficient Organic Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(4)

Опубликована: Ноя. 23, 2023

Abstract Giant dimeric acceptor (G‐Dimer) is becoming one of the most promising organic solar cell (OSC) materials because its definite structure, long‐term stability, and high efficiency. Strengthening hetero‐molecular interactions by monomer modification greatly influences morphology thus device performance, but lacks investigation. Herein, two novel quinoxaline core‐based G‐Dimers, Dimer‐QX Dimer‐2CF, are synthesized. By comparing trifluoromethyl‐substituted Dimer‐2CF non‐substituted Dimer‐QX, trifluoromethylation effect on G‐Dimer investigated revealed. The trifluoromethyl with strong electronegativity increases electrostatic potential reduces surface energy G‐Dimer, weakening homo‐molecular ordered packing reinforcing interaction donor. suppresses fast assembly during film formation, facilitating small domains molecular in blend, which a trade‐off conventional control. Together favorable vertical phase separation, efficient charge generation, reduced bimolecular recombination concurrently obtained. Hence, Dimer‐2CF‐based OSCs obtain cutting‐edge efficiency 19.02% fill factor surpassing 80%, an averaged extrapolated T 80 ≈12 000 h under continuous °C heating. This study emphasizes importance strategy, providing facile strategy for designing highly stable OSC materials.

Язык: Английский

---

Non‐Fully Conjugated Dimerized Giant Acceptors with Different Alkyl‐Linked Sites for Stable and 19.13 % Efficiency Organic Solar Cells

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(14)

Опубликована: Фев. 9, 2024

Abstract Achieving both high power conversion efficiency (PCE) and device stability is a major challenge for the practical development of organic solar cells (OSCs). Herein, three non‐fully conjugated dimerized giant acceptors (named 2Y‐sites, including wing‐site‐linked 2Y‐wing, core‐site‐linked 2Y‐core, end‐site‐linked 2Y‐end) are developed. They share similar monomer precursors but have different alkyl‐linked sites, offering fine‐tuned molecular absorption, packing, glass transition temperature, carrier mobility. Among their binary active layers, D18/2Y‐wing has better miscibility, leading to optimized morphology more efficient charge transfer compared D18/2Y‐core D18/2Y‐end. Therefore, D18/2Y‐wing‐based OSCs achieve superior PCE 17.73 %, attributed enhanced photocurrent fill factor. Furthermore, exhibit balance improved stability, distinguishing them within 2Y‐sites. Building on success 2Y‐wing in systems, we extend its application ternary by pairing it with near‐infrared absorbing D18/BS3TSe‐4F host. Thanks complementary absorption 300–970 nm further morphology, obtain higher 19.13 setting new benchmark dimer‐derived OSCs. This approach site engineering constructing presents promising pathway improve

Язык: Английский

---

Binary All‐polymer Solar Cells with a Perhalogenated‐Thiophene‐Based Solid Additive Surpass 18 % Efficiency

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(9)

Опубликована: Янв. 3, 2024

Abstract Morphological control of all‐polymer blends is quintessential yet challenging in fabricating high‐performance organic solar cells. Recently, solid additives (SAs) have been approved to be capable tuning the morphology polymer: small‐molecule improving performance and stability devices. Herein, three perhalogenated thiophenes, which are 3,4‐dibromo‐2,5‐diiodothiophene (SA‐T1), 2,5‐dibromo‐3,4‐diiodothiophene (SA‐T2), 2,3‐dibromo‐4,5‐diiodothiophene (SA‐T3), were adopted as SAs optimize cells (APSCs). For blend PM6 PY‐IT, benefitting from intermolecular interactions between thiophenes polymers, molecular packing properties could finely regulated after introducing these SAs. In situ UV/Vis measurement revealed that assist morphological character evolution blend, leading their optimal morphologies. Compared as‐cast device : all SA‐treated binary devices displayed enhanced power conversion efficiencies 17.4–18.3 % with obviously elevated short‐circuit current densities fill factors. To our knowledge, PCE 18.3 for SA‐T1‐treated ranks highest among APSCs date. Meanwhile, universality SA‐T1 other demonstrated unanimously improved performance. This work provide a new pathway realizing APSCs.

Язык: Английский

---

High efficiency and thermally stable ternary all-polymer solar cells achieved by alloyed vinyl-linked polymerized small-molecule acceptors

Nano Energy, Год журнала: 2024, Номер 122, С. 109338 - 109338

Опубликована: Янв. 25, 2024

Язык: Английский

---

Polymer-like tetramer acceptor enables stable and 19.75% efficiency binary organic solar cells

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Фев. 20, 2025

Abstract Limited by large batch differences and inferior polymerization degree of current polymer acceptors, the potential high efficiency stability advantages all-polymer solar cells (all-PSCs) cannot be fully utilized. Alternatively, largely π-extended structurally definite oligomer acceptors are effective strategies to realize overall performance acceptors. Herein, we report a linear tetramer acceptor namely 4Y-BO with identical molecular skeleton comparable molecular-weight relative control PY-BO. The shows refined film-forming kinetics improved ordering, offering uniform crystallinity donor hence well-defined fibrous heterojunction textures. Encouragingly, PM6:4Y-BO devices achieve an up 19.75% (certified efficiency:19.58%), surpassing that PM6:PY-BO device (15.66%) ranks highest among based on More noticeably, thermal stability, photostability mechanical flexibility collectively enhanced for devices. Our study provides important approach fabricating stable organic photovoltaics.

Язык: Английский

---