Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 55, P. 105418 - 105418
Published: Nov. 9, 2024
Language: Английский
National Science Review, Journal Year: 2025, Volume and Issue: 12(3)
Published: Jan. 21, 2025
Polymer solar cells (PSCs) leverage blend films from polymer donors and small-molecule acceptors (SMAs), offering promising opportunities for flexible power sources. However, the inherent rigidity crystalline nature of SMAs often embrittle donor in constructed bulk heterojunction structure. To address this challenge, we improved stretchability by designing synthesizing a tethered giant tetrameric acceptor (GTA) with increased molecular weight that promotes entanglement individual SMA units. The key to design is using tetraphenylmethane as linking core create three-dimensional high C2 symmetry structure, which successfully regulates their aggregation relaxation behavior. With GTA acceptor, its PM6 exhibit significantly stretchability, nearly 150% increase crack onset strain value compared PM6:Y6. Moreover, PSCs achieve an efficiency up 18.71% demonstrate outstanding photostability, maintaining >90% initial conversion after operating over 1000 hours. Our findings specifically aligning weights more closely those counterparts, can enhanced without compromising morphological stability or device efficiency.
Language: Английский
Citations
3
Nature Nanotechnology, Journal Year: 2025, Volume and Issue: unknown
Published: April 17, 2025
Language: Английский
Citations
1
Organic Electronics, Journal Year: 2025, Volume and Issue: unknown, P. 107207 - 107207
Published: Jan. 1, 2025
Language: Английский
Citations
0
Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown
Published: March 6, 2025
Large dipole moment additives have strong interactions with the host materials, which can optimize morphology and improve photovoltaic performance of organic solar cells (OSCs). However, these are difficult to remove due their intermolecular interactions, may impair stability. Developing volatile large moments is challenging. Herein, we first report imide that could effectively OSCs through modification. Three N-(o-chlorophenyl)phthalimide (oClPA), N-(m-chlorophenyl)phthalimide (mClPA), N-(p-chlorophenyl)phthalimide (pClPA) were screened investigate effort positional isomerization on molecular configuration interaction. These (ClPAs) larger (2.0664 Debye for oClPA, 4.2361 mClPA, 4.7896 pClPA) compared reported solid additives. In contrast traditional simultaneous nucleation crystal growth, ClPAs induce acceptor nucleate then grow, contributes forming high-quality domains better crystallinity. To our knowledge, this unique film formation kinetics was first. The power conversion efficiency (PCE) based PM6:BTP-eC9 treated pClPA improved from 16.13 % 18.58 %. Additive also performed well in PM6:L8-BO, PM6:Y6, D18:L8-BO systems, a high PCE 19.04 achieved. Our results indicate using unit construct simple effective strategy, halogen atom has effect performance.
Language: Английский
Citations
0
Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown
Published: March 10, 2025
Advancements in narrow bandgap organic small molecule acceptors (SMAs) has promoted solar cell (OSC) efficiencies beyond 20%. Achieving this milestone necessitates precise control over the active layer morphology, particularly its crystallinity and phase distribution, to optimize light absorption, charge transport, suppress recombination. However, controlling SMA morphology remains a significant challenge due their strong aggregation tendency. Existing methods, including high-temperature annealing, introducing high boiling point additives, frequently yield disordered polymorphs with limited scalability. Here, we report novel approach of utilizing 4-bromochlorobenzene as volatile solid additive induce formation highly ordered polymorph BTP-eC9 through mild annealing at 60 °C. This marks first demonstration such an polymorph, exhibiting optical properties comparable ideal crystals, enhanced anisotropy, refractive index, extinction coefficients. The specific further enables well-organized PM6 donor arrangement, establishing optimal bicontinuous network morphology. Consequently, OSCs based on PM6:BTP-eC9 achieve power conversion efficiency 19.53%, which increases 20.32% addition antireflection layer. work provides scalable effective strategy for enhancing OSC performance highlights critical role polymorphism optimizing photovoltaic performance.
Language: Английский
Citations
0
Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown
Published: March 6, 2025
Abstract Large dipole moment additives have strong interactions with the host materials, which can optimize morphology and improve photovoltaic performance of organic solar cells (OSCs). However, these are difficult to remove due their intermolecular interactions, may impair stability. Developing volatile large moments is challenging. Herein, we first report imide that could effectively OSCs through modification. Three N ‐( o ‐chlorophenyl)phthalimide ( ClPA), m p ClPA) were screened investigate effort positional isomerization on molecular configuration interaction. These (ClPAs) larger (2.0664 Debye for ClPA, 4.2361 4.7896 compared reported solid additives. In contrast traditional simultaneous nucleation crystal growth, ClPAs induce acceptor nucleate then grow, contributes forming high‐quality domains better crystallinity. To our knowledge, this unique film formation kinetics was first. The power conversion efficiency (PCE) based PM6:BTP‐eC9 treated ClPA improved from 16.13 % 18.58 %. Additive also performed well in PM6:L8‐BO, PM6:Y6, D18:L8‐BO systems, a high PCE 19.04 achieved. Our results indicate using unit construct simple effective strategy, halogen atom has effect performance.
Language: Английский
Citations
0
Next Materials, Journal Year: 2025, Volume and Issue: 8, P. 100595 - 100595
Published: March 22, 2025
Language: Английский
Citations
0
Small, Journal Year: 2025, Volume and Issue: unknown
Published: April 21, 2025
Abstract Achieving high‐performance organic solar cells (OSCs) relies heavily on precise morphology optimization, a challenging task due to the intrinsic differences in crystallization kinetics and interfacial compatibility between polymer donors small‐molecule acceptors. In this work, 2,7‐dibromonaphthalene (DBN) is introduced as an innovative solid additive that uniquely regulates both donor acceptor phases within PM6:Y6 system. Unlike conventional liquid additives, which often induce excessive Y6 crystallization, DBN achieves balanced enhancing molecular order PM6 while mitigating over‐aggregation Y6. This dual‐phase effect improves light absorption, exciton generation dissociation, charge transport, reduces recombination losses. As result, OSCs treated with achieved remarkable power conversion efficiency (PCE) of 18.5%, open‐circuit voltage ( V OC ) 0.848 V, high short‐circuit current density J SC 28.15 mA cm −2 , enhanced fill factor (FF) 77.7%. Adding anti‐reflection MgF 2 layer further boosts 19.0%, setting new benchmark for binary devices. study establishes promising regulator presents robust strategy control, advancing development photovoltaic applications.
Language: Английский
Citations
0
ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 10, 2025
Morphology optimization of blend films is an essential strategy to enhance the photovoltaic performance organic solar cells (OSCs). Additive engineering effective for fine-tuning active layer morphology. Given limited efforts and achievements in designing synthesizing liquid additives, new solid additives manipulate morphology layers have gained widespread attention. Herein, 1,4-dimethoxynaphthalene (DMNA), with merits simple structure, low cost, ecofriendliness, successfully incorporated as a novel additive optimize OSCs based on D18-Cl:N3. The relationship between different DMNA contents device has been investigated. It found that can be effectively regulated by DMNA, leading enhanced molecular packing films, which favors exciton dissociation, charge transfer, suppression recombination. As result, 18.61% power conversion efficiency (PCE) obtained D18-Cl:N3 binary devices better than 17.21% PCE control device. This primarily due simultaneous increase short-circuit current density fill factor. Furthermore, general applicability confirmed other systems. These results suggest presents potential prospects regulating bulk heterojunction toward high-performance high-stability OSCs.
Language: Английский
Citations
0
Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown
Published: March 10, 2025
Abstract Advancements in narrow bandgap organic small molecule acceptors (SMAs) has promoted solar cell (OSC) efficiencies beyond 20%. Achieving this milestone necessitates precise control over the active layer morphology, particularly its crystallinity and phase distribution, to optimize light absorption, charge transport, suppress recombination. However, controlling SMA morphology remains a significant challenge due their strong aggregation tendency. Existing methods, including high‐temperature annealing, introducing high boiling point additives, frequently yield disordered polymorphs with limited scalability. Here, we report novel approach of utilizing 4‐bromochlorobenzene as volatile solid additive induce formation highly ordered polymorph BTP‐eC9 through mild annealing at 60 °C. This marks first demonstration such an polymorph, exhibiting optical properties comparable ideal crystals, enhanced anisotropy, refractive index, extinction coefficients. The specific further enables well‐organized PM6 donor arrangement, establishing optimal bicontinuous network morphology. Consequently, OSCs based on PM6:BTP‐eC9 achieve power conversion efficiency 19.53%, which increases 20.32% addition antireflection layer. work provides scalable effective strategy for enhancing OSC performance highlights critical role polymorphism optimizing photovoltaic performance.
Language: Английский
Citations
0