Insulator Polymer Matrix Construction on All‐Small‐Molecule Photoactive Blend Towards Extrapolated 15000 Hour T₈₀ Stable Devices

Advanced Materials, Год журнала: 2024, Номер 36(35)

Опубликована: Июль 11, 2024

Abstract To boost the stability of all‐small‐molecule (ASM) organic photovoltaic (OPV) blends, an insulator polymer called styrene‐ethylene‐butylene‐styrene (SEBS) as morphology stabilizer is applied into host system small molecules BM‐ClEH:BO‐4Cl. Minor addition SEBS (1 mg/ml in solution) provides a significantly enhanced T 80 value 15000 hours (extrapolated), surpassing doping‐free (0 mg/ml) and heavy doping (10 counterparts (900 hours, 30 hours). The material reproducibility cost‐effectiveness active layer will not be affected by this industrially available polymer, where power conversion efficiency (PCE) can well maintained at 15.02%, which still decent for non‐halogen solvent‐treated ASM OPV. Morphological photophysical characterizations clearly demonstrate SEBS's pivotal effect on suppressing degradation donor blend film's crystallization/aggregation reorganization, protects exciton dynamics effectively. This work pays meaningful attention to stability, performs smart strategy suppress film degradation, releases comprehensive understanding mechanism device performance reduction.

Язык: Английский

---

High‐Performance Photoactive Polymers: Innovations in Ternary Polymerization for Solar Applications

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 2, 2025

Abstract In recent years, polymer solar cells (PSCs) have achieved rapid progress, with power conversion efficiencies (PCEs) reaching up to 20.25%, driven by significant advancements in device fabrication and active‐layer materials. The ternary polymerization strategy has proven be a straightforward effective approach for developing high‐performance photoelectric polymers incorporating third monomer into the backbone. This incorporation effectively optimizes intrinsic properties, including UV–vis absorption, energy levels, solubility, crystallinity, morphology, charge transfer, mechanical robustness, batch‐to‐batch reproducibility, stability. review highlights latest designing photoactive copolymers (both donors acceptors), particular focus on stability, potential applications commercial development. aim is provide valuable guidance development of materials using strategy.

Язык: Английский

---

Molecular Design of Dimeric Acceptor Enables Binary Organic Solar Cells with 19.78% Efficiency and Enhanced Stability

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract The development of organic solar cells (OSCs) with high efficiency and stability is highly desirable to facilitate its commercial applications. Although dimeric acceptors distinctive advantages have been widely studied, high‐performance binary OSCs based on such molecules rarely achieved. In this work, a new acceptor (DY‐FL) constructed by simultaneously optimizing the linking sites units, as well building blocks. Thanks effective molecular design, DY‐FL provides improved stacking for fibrous morphology favorable exciton/charge dynamics. Consequently, DY‐FL‐based render superior power conversion (PCE) 19.78%, representing record‐breaking acceptors. Importantly, devices display significantly enhanced operational under external stimuli light heat, in comparison their small molecule (Y‐F)‐based counterpart. These findings highlight significance blocks modes, providing insight into design strategy state‐of‐the‐art OSCs.

Язык: Английский

---

Biaxially Conjugated Materials for Organic Solar Cells

ACS Nano, Год журнала: 2023, Номер 18(1), С. 136 - 154

Опубликована: Дек. 26, 2023

Organic solar cells (OSCs) represent one of the most important emerging photovoltaic technologies that can implement energy conversion efficiently. The chemical structure organic semiconductors deployed in active layer OSCs plays a critical role performance and chemical/physical stability relevant devices. With innovation semiconductors, especially nonfullerene acceptors (NFAs), have been promoted rapidly recent years, with state-of-the-art power efficiencies (PCEs) exceeding 19.5%. Compared other photovoltaics like perovskite, shortcoming mainly lies high nonradiative recombination loss. However, photocurrent density is superior owing to easy modulation NFA band gap toward near-infrared region. In these regards, effort further boost PCE achieve milestone >21% should be devoted reducing loss while broadening absorption band. Developing biaxially extended conjugated structures has provided potential solution goals. Herein, we summarize design rules progress materials for OSCs. descriptions are divided into two major categories, i.e., polymers NFAs. For p-type polymers, focus on biaxial conjugation some representative building blocks, e.g., polythiophene, triphenylamine, quinoxaline. Whereas n-type large planes normal direction presented. We also elaborate strategies NFAs modification site at either π-core or side-group. general structure–property relationships retrieved within materials, short-wavelength Finally, provide an outlook highly efficient, stable, industry-compatible

Язык: Английский

---

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

Angewandte Chemie, Год журнала: 2024, Номер 136(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

---