Theoretical Chemistry Accounts, Journal Year: 2023, Volume and Issue: 142(10)
Published: Sept. 28, 2023
Language: Английский
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)
Published: June 19, 2024
In the recent advances of organic solar cells (OSCs), quinoxaline (Qx)-based nonfullerene acceptors (QxNFAs) have attracted lots attention and enabled recorded power conversion efficiency approaching 20%. As an excellent electron-withdrawing unit, Qx possesses advantages many modifiable sites, wide absorption range, low reorganization energy, so on. To develop promising QxNFAs to further enhance photovoltaic performance OSCs, it is necessary systematically summarize reported far. this review, all focused are classified into five categories as following: SM-Qx, YQx, fused-YQx, giant-YQx, polymer-Qx according molecular skeletons. The design concepts, relationships between structure optoelectronic properties, intrinsic mechanisms device discussed in detail. At end, kind materials summed up, direction prospected, challenges faced by given, constructive solutions existing problems advised. Overall, review presents unique viewpoints conquer challenge thus boost OSCs development toward commercial applications.
Language: Английский
Citations
33
Nano Energy, Journal Year: 2024, Volume and Issue: 125, P. 109542 - 109542
Published: March 24, 2024
Language: Английский
Citations
12
SusMat, Journal Year: 2024, Volume and Issue: 4(3)
Published: May 10, 2024
Abstract Side‐chain symmetry‐breaking strategy plays an important role in developing photovoltaic materials for high‐efficiency all‐small‐molecule organic solar cells (ASM OSCs). However, the power conversion efficiencies (PCEs) of ASM OSCs still lag behind their polymer‐based counterparts, which can be attributed to difficulties achieving favorable morphology. Herein, two asymmetric porphyrin‐based donors named DAPor‐DPP and DDPor‐DPP were synthesized, presenting stronger intermolecular interaction closer molecular stacking compared symmetric ZnP‐TEH. The DAPor‐DPP:6TIC blend afforded a morphology with nanoscale phase separation more ordered packing, thus efficient charge transportation suppressed recombination. Consequently, DAPor‐DPP:6TIC‐based device exhibited superior parameters, yielding champion PCE 16.62% higher than that DDPor‐DPP‐based (14.96%). To our knowledge, ranked as one highest values among binary OSC filed. This work provides prospective approach address challenge improving film further high efficiency via side‐chain strategy, exhibiting great potential constructing OSCs.
Language: Английский
Citations
11
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
11
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: July 18, 2024
Abstract In organic solar cells (OSCs), the short exciton lifetime poses a significant limitation to diffusion and dissociation. Extending suppressing recombination are crucial strategies for improving OSC performance. Herein, an effective approach is proposed by introducing phosphorescent emitter, tris(2‐(4‐(tert‐butyl)phenyl)‐5‐fluoropyridine)Iridium(III), with long‐lived triplet in OSCs. This research reveals that steric structure of fac ‐Ir(tBufppy) 3 exhibits excellent compatibility both donor PM6 acceptor BTP‐eC9, maintaining efficiencies over 90% even 30% third component loading. Moreover, 10% addition mitigates excessive aggregation optimizing active layer morphology fill factor. Transient absorption spectroscopy transient photoluminescence measurements demonstrate introduction significantly extends lifetimes suppresses recombination, which increases short‐circuit current ( J SC ). Ultimately, employing non‐halogenated solvent o‐xylene processing, impressive power conversion efficiency (PCE) 18.54% achieved devices based on PM6:10% :BTP‐eC9, surpassing binary PM6:BTP‐eC9 (17.41%). work provides promising further improve PCEs OSCs iridium(III) complex as component.
Language: Английский
Citations
8
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 16, 2024
Abstract The development of high‐performance organic photovoltaics (OPVs) with thick film active layers is key to moving this technology from laboratory preparation industrial production. Design and synthesis layer materials achieve a bi‐continuous interpenetrating morphology appropriate nanoscale phase separation has been demonstrated as an effective method realize high‐efficiency devices. Here, two non‐fullerene acceptors are developed compare the effect symmetric (diDT‐BO) asymmetric (DTC11‐BO) substituted alkyl chains on device performance by introducing side central core pyrrole ring. Based solubility crystallinity differences DTC11‐BO diDT‐BO, power conversion efficiencies (PCEs) 19.0% 18.1% realized D18 donor. Importantly, D18:DTC11‐BO devices 300 500 nm excellent PCEs 17.7% 16.1%, which among top‐class values for OPVs reported date. work demonstrates that tunning optimizing material design strategy OPVs.
Language: Английский
Citations
8
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 9, 2024
Abstract Organic solar cells (OSCs) are gaining attention in building‐integrated and agricultural photovoltaics due to their light weight, mechanical flexibility, low‐cost solution processability. To achieve commercial viability, understanding the relationships between active layer material structure, film morphology, photovoltaic performance is crucial. Nanoscale infrared spectroscopy coupled with atomic force microscopy (nanoIR‐AFM) offers an advanced characterization of morphology at high resolution help understand OSC performance. This review outlines recent developments applications nanoIR‐AFM research, detailing its principles, instruments, functions. Strategies enhance morphological by discussed, offering insights into evolution device The highlights challenges faced potential role advancing technology. As continues evolve, it will play a critical development, providing essential technical means for further progress.
Language: Английский
Citations
6
ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(5), P. 1984 - 1991
Published: April 15, 2024
Precise adjustment of the nanoscale morphology within active layers is crucial for optimizing photovoltaic performance all-small-molecule organic solar cells (ASM-OSCs), and halogen substituent strategy materials plays a vital role in development evolution. In this work, we systematically study series acceptor–donor–acceptor (A-D-A) type small-molecule donors by incorporating halogenation at thienyl benzo[1,2-b:4,5-b′]dithiophene (BDT-T) donor core unit named BSTR-F, BSTR-Cl, BSTR-Br. Such demonstrated to induce significant increase ionization potential, i.e., deeper HOMO, more ordered packing property. Using N3 as acceptor, BSTR-F-based devices achieve power conversion efficiency (PCE) up 15.93%, compared with control nonhalogenated BSTR-H-based 13.80%, indicating that suitable could effectively promote high ASM-OSCs.
Language: Английский
Citations
3
Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: 42(23), P. 3075 - 3082
Published: Aug. 1, 2024
Comprehensive Summary Small‐molecular organic solar cells usually exhibited unsatisfactory device stability, which might originate from their molecular diffusion behaviors. Herein, based on the all‐small‐molecule system HD‐1:BTP‐eC9, we reported a dimerized acceptor DC9, and its corresponding monomer eOD. In comparison with eOD, dimeric DC9 displayed higher glass transition temperature ( T g ) but reduced planarity crystallinity. The all‐small molecule blend utilizing HD‐1:eOD demonstrated power conversion efficiency (PCE) of 15.13%, surpassing value 14.10% for HD‐1:DC9 blend. While, incorporating polymer donor PM6 into improved morphology charge transport dynamics, resulting in over 16%, representing rare case small‐molecular PCE 16%. Morphological characterization results affirmed that surface morphologies packing behaviors films HD‐1 were largely retained even after prolonged annealing aging at 85 °C. Consequently, PCEs HD‐1:eOD, HD‐1:DC9, HD‐1:PM6:DC9 consistently remained 98% initial 1000 h thermal These findings highlight potential active layer fabrication efficient stable OSCs.
Language: Английский
Citations
3
Materials Science in Semiconductor Processing, Journal Year: 2025, Volume and Issue: 190, P. 109303 - 109303
Published: Jan. 24, 2025
Language: Английский
Citations
0