Science China Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 28, 2024
Language: Английский
Advanced Science, Journal Year: 2024, Volume and Issue: 11(31)
Published: June 17, 2024
Abstract Halogenation of Y‐series small‐molecule acceptors (Y‐SMAs) is identified as an effective strategy to optimize photoelectric properties for achieving improved power‐conversion‐efficiencies (PCEs) in binary organic solar cells (OSCs). However, the effect different halogenation 2D‐structured large π‐fused core guest Y‐SMAs on ternary OSCs has not yet been systematically studied. Herein, four 2D‐conjugated (X‐QTP‐4F, including halogen‐free H‐QTP‐4F, chlorinated Cl‐QTP‐4F, brominated Br‐QTP‐4F, and iodinated I‐QTP‐4F) by attaching halogens into 2D‐conjugation extended dibenzo[ f , h ]quinoxaline are developed. Among these X‐QTP‐4F, Cl‐QTP‐4F a higher absorption coefficient, optimized molecular crystallinity packing, suitable cascade energy levels, complementary with PM6:L8‐BO host. Moreover, among PM6:L8‐BO:X‐QTP‐4F blends, PM6:L8‐BO:Cl‐QTP‐4F obtains more uniform size‐suitable fibrillary network morphology, well vertical phase distribution, thus boosting charge generation, transport, extraction, suppressing loss OSCs. Consequently, PM6:L8‐BO:Cl‐QTP‐4F‐based achieve 19.0% efficiency, which state‐of‐the‐art based superior devices host (17.70%) guests H‐QTP‐4F (18.23%), Br‐QTP‐4F (18.39%), I‐QTP‐4F (17.62%). The work indicates that promising gain efficient
Language: Английский
Citations
13
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(1)
Published: Aug. 24, 2024
Disordered polymer chain entanglements within all-polymer blends limit the formation of optimal donor-acceptor phase separation. Therefore, developing effective methods to regulate morphology evolution is crucial for achieving morphological features in organic solar cells (APSCs). In this study, two isomers, 4,5-difluorobenzo-c-1,2,5-thiadiazole (SF-1) and 5,6-difluorobenzo-c-1,2,5-thiadiazole (SF-2), were designed as solid additives based on widely-used electron-deficient benzothiadiazole unit nonfullerene acceptors. The incorporation SF-1 or SF-2 into PM6 : PY-DT blend induces stronger molecular packing via interaction, leading continuous interpenetrated networks with suitable phase-separation vertical distribution. Furthermore, after treatment SF-2, exciton diffusion lengths films are extended over 40 nm, favoring charge transport. asymmetrical characterized by an enhanced dipole moment, increases power conversion efficiency (PCE) PY-DT-based device 18.83 % due electrostatic interactions. Moreover, a ternary strategy boosts PCE SF-2-treated APSC 19 %. This work not only demonstrates one best performances APSCs but also offers approach manipulate using rational-designed additives.
Language: Английский
Citations
12
National Science Review, Journal Year: 2024, Volume and Issue: 11(12)
Published: Nov. 4, 2024
ABSTRACT Solid additive engineering has been intensively explored on morphology tuning for highly efficient all-polymer solar cells (all-PSCs), a promising photovoltaic technology towards multi-scenario application. Although the nano-fibrillar network of active layer induced by treatment is confirmed as key factor power conversion efficiency (PCE) all-PSCs, its formation mechanism not clearly revealed, lack precise and convincing real-time observation crystallization phase separation during liquid-to-solid transition process spin-coating. Herein we report an in-situ grazing incidence wide-angle/small-angle X-ray scattering (GIWAXS/GISAXS) screening that reveals fact naphthalene derived solid additives can suppress aggregation polymer acceptor (PY-IT) at beginning stage spin coating, which provides sufficient time space donor (PM6) to form fibril structure. Moreover, guided this knowledge, ternary system proposed, achieves cutting-edge level PCEs both small-area (0.04 cm2) (also decent operational stability) large-area (1 devices.
Language: Английский
Citations
9
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160416 - 160416
Published: Feb. 1, 2025
Language: Английский
Citations
1
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: Feb. 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.
Language: Английский
Citations
1
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 15, 2025
Abstract Developing high‐performance all‐polymer solar cells (all‐PSCs) remains a challenge due to the difficulty in controlling morphology of polymer blends. In this study, benzo[1,2‐d:4,5‐d′]bisthiazole (BBTz) is incorporated into PM6 main chain create series terpolymer donors, leveraging entropy increase and superior miscibility with acceptors modulate blend morphology. The introduction BBTz broadened absorption range, enhanced film crystallinity, significantly improved donor‐acceptor through its low dipole moment high electrostatic potential. This facilitated formation nanofiber structures active layer, thus optimizing As result, PBZ‐10:PY‐IT‐based device achieved an impressive power conversion efficiency (PCE) 19.06%. Incorporation PBQx‐TF binary can further improve morphology, charge transport, exciton lifetime, dissociation, collection, as well suppressed recombination, finally leading record‐breaking PCE 20.04% for all‐PSCs date. findings demonstrate effectiveness strategy enhancing all‐PSC performance. By molecular design component selection, approach provides viable pathway achieving higher supports advancement renewable energy technologies.
Language: Английский
Citations
1
Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 26, 2024
Abstract This 5th annual “ Emerging PV Report” highlights the latest advancements in performance of emerging photovoltaic (e‐PV) devices across various e‐PV research areas, as documented peer‐reviewed articles published since August 2023. Updated graphs, tables, and analyses are provided, showcasing several key parameters, including power conversion efficiency, open‐circuit voltage, short‐circuit current, fill factor, light utilization stability test energy yield. These parameters presented functions bandgap average visible transmittance for each technology application contextualized using benchmarks such detailed balance efficiency limit.
Language: Английский
Citations
5
Giant, Journal Year: 2024, Volume and Issue: 20, P. 100336 - 100336
Published: Aug. 23, 2024
Language: Английский
Citations
4
Journal of Power Sources, Journal Year: 2025, Volume and Issue: 631, P. 236206 - 236206
Published: Jan. 13, 2025
Language: Английский
Citations
0
The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 11, 2025
Language: Английский
Citations
0