Organic Letters, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 9, 2024
Synthesis of size and functional-group tunable dansyl-appended fluorescent macrocycles
Language: Английский
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(14)
Published: Feb. 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
Language: Английский
Citations
41
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: Jan. 20, 2025
Language: Английский
Citations
2
Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 345, P. 127408 - 127408
Published: April 6, 2024
Language: Английский
Citations
10
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(35)
Published: July 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.
Language: Английский
Citations
10
Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(12), P. 4184 - 4193
Published: May 21, 2024
Language: Английский
Citations
9
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 5, 2024
Abstract Significant advancements in power conversion efficiency have been achieved organic solar cells with small molecule acceptors. However, stability remains a primary challenge, impeding their widespread adoption renewable energy applications. This review summarizes the degradation of different layers within device structure under varying conditions, including light, heat, moisture, and oxygen. For photoactive layers, chemical pathways polymer donors acceptors are examined detail, alongside morphological bulk heterojunction structure, which plays crucial role performance. The mechanisms commonly used anode cathode interlayers electrodes addressed, as these significantly influence overall stability. Mitigation methods for identified provided each section to offer practical insights improving longevity. Finally, an outlook presents remaining challenges achieving long‐term stability, emphasizing research directions that require further investigation enhance reliability performance real‐world
Language: Английский
Citations
8
Giant, Journal Year: 2024, Volume and Issue: 20, P. 100336 - 100336
Published: Aug. 23, 2024
Language: Английский
Citations
6
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 19, 2024
Abstract Organic photovoltaics (OPVs) have made significant strides with efficiencies now exceeding 20%, positioning them as potential competitors to inorganic solar technologies. One of the most critical challenges toward this goal is severe open‐circuit voltage ( V oc ) loss caused by nonradiative charge recombination (NRCR). Herein, review comprehensively summarizes NRCR mechanisms and suppression techniques OPVs across various scales from molecule device. Specifically, origins in a single are first summarized, molecular design principles high photoluminescence quantum yield reviewed following Marcus theory. Next, effect aggregation on reviewed, well processing strategies modulate film packing for suppression. Furthermore, progresses avoidance pathways mediated transfer states triplet donor:acceptor bulk heterojunctions tracked. Besides, interfacial optimization device structure maximize electroluminescent efficiency presented. Finally, several curtailing high‐performance outlined. Therefore, shows an insightful perspective understand mitigate at multi‐scales, poised provide clear roadmap next breakthrough OPVs.
Language: Английский
Citations
5
FlexMat., Journal Year: 2024, Volume and Issue: 1(3), P. 221 - 233
Published: Aug. 18, 2024
Abstract Ultra‐thin (also known as ultra‐flexible) organic photovoltaics (OPVs) represent a strong contender among emerging photovoltaic technologies. However, due to the imbalance between optical and electrical properties of indium tin oxide (ITO)‐free transparent electrodes, ultra‐thin OPVs often exhibit lower efficiency compared brittle yet more balanced rigid ITO counterparts. Here, we design fabricate an advanced OPV, which involves thoroughly optimized silver nanowires (AgNWs) electrode (named AZAT) with excellent optical, mechanical properties. Specifically, high‐kinetic energy spray‐coating method successfully yields curve‐shaped, tightly connected uniformly distributed AgNWs film, complemented by capping layer zinc oxide:aluminum‐doped (ZnO:AZO) improve charge collection capability. Simultaneously, transparency is enhanced through precise optimization. Thus, implant AZAT‐based devices on 1.3 μm polyimide substrates demonstrate record 18.46% power density 40.31 W g −1 , highest value for PV Encouragingly, AZAT also enables 10.0 cm 2 device high 15.67%. These results provide valuable insights development efficiency, low cost, superior flexibility, up‐scaling capacity.
Language: Английский
Citations
4
ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(11), P. 5541 - 5549
Published: Oct. 25, 2024
The efficiencies of dimer-based devices still lag those their small molecule-based counterparts. This is primarily due to the considerable dihedrals in dimer skeleton, which compromises molecular packing, thus influencing charge generation and nonradiative voltage loss (ΔVoc,nr). Herein, we developed two dimeric acceptors with varied π-linkers investigate influence linker-induced conformational lock on ΔVoc,nr. We find that helically lapped O-shaped delivers better intermolecular packing than planar S-shaped one incorporates a bulkier π-linker. However, its skeleton instead more favorable for forming compact ordered stacking host acceptor ternary blend. possibly promotes exciton dissociation, reducing decay excited states. Moreover, longer lifetime could offer additional charge-transfer channels. These contributions effectively minimize ΔVoc,nr 0.195 eV, while delivering high efficiency approaching 20% derived device.
Language: Английский
Citations
4