Harnessing the Structure‐Performance Relationships in Designing Non‐Fused Ring Acceptors for Organic Solar Cells

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(21)

Опубликована: Фев. 17, 2023

Abstract The prerequisite for commercially viable organic solar cells (OSC) is to reduce the efficiency‐stability‐cost gap. Therefore, cost of materials should be reduced by minimizing synthetic steps, yet maintaining molecular planarity and efficiencies achieved fused ring acceptors (FRA). In this respect, developing non‐fused (NFRA) with suitable functionalization favor conformational effective packing beneficial cost‐effective. Presently, power conversion efficiency (PCE) NFRAs around 16 %, lower than 19 % FRAs. Despite their potential, a thorough understanding structural design necessary efficient OSCs. This article pays special attention concept developed in last years analyzed approach toward improvement, an important step technological application.

Язык: Английский

---

Oligomeric Acceptor Enables High‐Performance and Robust All‐Polymer Solar Cells with 17.4% Efficiency

Advanced Energy Materials, Год журнала: 2023, Номер 13(20)

Опубликована: Апрель 6, 2023

Abstract Developing efficient and stable all‐polymer solar cells (all‐PSCs) has received increasing attention because of their mechanical robustness for flexible devices. Based on the CH‐series small molecule acceptors, a new polymer acceptor (PZC24) is reported obtains decent power conversion efficiency (PCE) 16.82% when blended with PM6. To further improve performance, an oligomeric (CH‐D1), which possesses same backbone structure as PZC24, proposed synthesized third component all‐PSC system. The creative strategy improves crystallinity molecular packing, can maintain charge transport channels all‐PSCs binary Therefore, PM6:PZC24:CH‐D1 based ternary devices exhibit impressive PCE 17.40%, among highest value all‐PSCs. Compared to PM6:PZC24, device exhibits enhanced photosoaking stability thermal stability, simultaneously. In addition, introduction does not weaken As such, display excellent 15.35%. Importantly, this shows universality in PM6:PY‐IT PM6:PY‐V‐γ improved PCEs over 17%. results provide feasible simultaneously photovoltaic herald bright future

Язык: Английский

---

High‐Efficiency Binary and Ternary Organic Solar Cells Based on Novel Nonfused‐Ring Electron Acceptors

Advanced Materials, Год журнала: 2023, Номер 36(7)

Опубликована: Окт. 9, 2023

Abstract In this study, three nonfused‐ring electron acceptors ( 2TT , 2TT‐C6‐F, and 2TT‐C11‐F ) with the same steric hindrance groups (2,4,6‐tripropylbenzene) are designed synthesized impact of electron‐withdrawing lateral alkyl side chains on performance binary ternary organic solar cells (OSCs) is explored. For OSCs, IC‐2F terminal undecyl display a red shifted absorption spectrum suitable energy levels, corresponding blend film exhibits appropriate phase separation crystallinity. Thus, OSCs based achieve an impressive power conversion efficiency 13.03%, much higher than efficiencies those (9.68%) 2TT‐C6‐F (12.11%). CC hexyl exhibit complementary cascade levels host system (D18:BTP‐eC9‐4F). Hence, remarkable 19.39%, ranking among highest reported values. The research yields comprehensive ‐series acceptors, demonstrating their great potential for fabrication high‐performance OSCs.

Язык: Английский

---

Powering the Future: A Critical Review of Research Progress in Enhancing Stability of High‐Efficiency Organic Solar Cells

Advanced Functional Materials, Год журнала: 2023, Номер 33(50)

Опубликована: Авг. 21, 2023

Abstract Organic solar cells (OSCs) are a promising photovoltaic technology that employs organic semiconductor material as the photoactive layer, which has unique advantages of light weight, large‐area flexible fabrication, low‐cost, and semitransparent. In recent years, performance OSCs been significantly improved, highest power conversion efficiency exceeded 19%. Despite tremendous progress in OSCs, major bottleneck realizing commercialization is device stability. Therefore, reviewing research on stability high‐performance urgent necessary. This review discusses factors limiting lifetime, such metastable morphology, air, irradiation, heat, mechanical stresses. Additionally, this presents over last 5 focusing enhancing from perspective layers other functional layers, includes design engineering, solid additives, optimizing buffer using stable electrodes, encapsulation. Lastly, explores current challenges prospects, including advanced machine learning techniques to assist experimental research.

Язык: Английский

---

Simple‐Structured Acceptor with Highly Interconnected Electron‐Transport Pathway Enables High‐Efficiency Organic Solar Cells

Advanced Materials, Год журнала: 2024, Номер 36(23)

Опубликована: Фев. 19, 2024

Abstract Achieving desirable charge‐transport highway is of vital importance for high‐performance organic solar cells (OSCs). Here, it shown how molecular packing arrangements can be regulated via tuning the alkyl‐chain topology, thus resulting in a 3D network stacking and highly interconnected pathway electron transport simple‐structured nonfused‐ring acceptor (NFREA) with branched alkyl side‐chains. As result, record‐breaking power conversion efficiency 17.38% (certificated 16.59%) achieved NFREA‐based devices, providing an opportunity constructing low‐cost high‐efficiency OSCs.

Язык: Английский

---

Molecular Design of Fully Nonfused Acceptors for Efficient Organic Photovoltaic Cells

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(13), С. 9205 - 9215

Опубликована: Март 25, 2024

The nonfused thiophene–benzene–thiophene (TBT) unit offers advantages in obtaining low-cost organic photovoltaic (OPV) materials due to its simple structure. However, OPV cells, including TBT-based acceptors, exhibit significantly lower energy conversion efficiencies. Here, we introduce a novel approach involving the design and synthesis of three acceptors by substituting different position-branched side chains on TBT unit. In comparison TBT-10 TBT-11, TBT-13, which exclusively incorporates α-position branched with large steric hindrance, demonstrates more planar stable conformation. When blended donor PBQx-TF, TBT-13-based blend film achieves favorable π–π stacking aggregation characteristics, resulting excellent charge transfer performance corresponding device. Due simultaneous enhancements short-circuit current density fill factor, cell obtains an outstanding efficiency 16.1%, marking highest value for cells based fully acceptors. Our work provides practical molecular strategy high-performance materials.

Язык: Английский

---

Simplified fabrication of high-performance organic solar cells through the design of self-assembling hole-transport molecules

Joule, Год журнала: 2024, Номер 8(6), С. 1723 - 1734

Опубликована: Апрель 10, 2024

Язык: Английский

---

A dendritic hexamer acceptor enables 19.4% efficiency with exceptional stability in organic solar cells

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

Опубликована: Янв. 20, 2025

Язык: Английский

---

Macrocyclic Encapsulation in a Non‐fused Tetrathiophene Acceptor for Efficient Organic Solar Cells with High Short‐Circuit Current Density

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(52)

Опубликована: Ноя. 10, 2023

Non-fullerene acceptors have shown great promise for organic solar cells (OSCs). However, challenges in achieving high efficiency molecular system with conformational unicity and effective stacking remain. In this study, we present a new design of non-fused tetrathiophene acceptor R4T-1 via employing the encapsulation macrocyclic ring. The single crystal structure analysis reveals that cyclic alkyl side chains can perfectly encapsulate central part molecule generate stable planar backbone. Whereas, control 4T-5 without restriction displays cis- twisted conformation. As result, based OSCs achieved an outstanding power conversion (PCE) exceeding 15.10 % short-circuit current density (Jsc ) 25.48 mA/cm2 , which is significantly improved by ≈30 relative to control. Our findings demonstrate strategy could assist fully electron (FNEAs) achieve photovoltaic performance pave way FNEAs design.

Язык: Английский

---

Organic small molecule acceptor materials for organic solar cells

eScience, Год журнала: 2023, Номер 3(5), С. 100171 - 100171

Опубликована: Авг. 6, 2023

The active layer of organic solar cells (OSCs) is composed a p-type conjugated polymer as the donor and an n-type semiconductor acceptor. Since report bulk-heterojunction OSCs with soluble C60 derivative PCBM acceptor in 1995, fullerene derivatives, including C70 PC71BM, have been dominant acceptors for 20 years. In 2015, A–D–A structured small molecule (SMA) was developed, which possesses advantages narrow bandgap, strong absorption long wavelength region, suitable electronic energy levels, contrast to acceptors. SMAs boost power conversion efficiency (PCE) 10–14% level. Recently, benefiting from innovation A–DA'D–A SMAs, PCE has rapidly increased 15% 19%. this review, development history materials briefly introduced. molecular structures physicochemical photovoltaic properties acceptors, derivatives bandgap are described. particular, effect regulating packing miscibility on their performance discussed. Finally, current challenges prospects analyzed

Язык: Английский

---