Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 18, 2024
In order to realize high-performance bulk-heterojunction (BHJ) all-polymer solar cells, achieving appropriate aggregation and moderate miscibility of the polymer blends is one critical factor. Herein, this study designs synthesizes two new acceptors (P
Language: Английский
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(21)
Published: Feb. 22, 2024
All-polymer solar cells (all-PSCs) have been regarded as one of the most promising candidates for commercial applications owing to their outstanding advantages such mechanical flexibility, light weight and stable film morphology. However, compared large amount new-emerging excellent polymer acceptors, development high-performance donor lags behind. Herein, a new D-π-A type donor, namely QQ1, was developed based on dithienoquinoxalineimide (DTQI) A unit, benzodithiophene with thiophene-conjugated side chains (BDTT) D alkyl-thiophene π-bridge, respectively. QQ1 not only possesses strong dipole moment, but also shows wide band gap 1.80 eV deep HOMO energy level -5.47 eV, even without halogen substituents that are commonly indispensable donors. When blended classic acceptor PY-IT, QQ1-based all-PSC delivers an PCE 18.81 %. After introduction F-BTA3 third component, record 19.20 % obtained, highest value reported so far all-PSCs. The impressive photovoltaic performance originates from broad absorption range, reduced loss, compact π-π stacking. These results provide insight in rational design novel nonhalogenated donors further
Language: Английский
Citations
61
Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 16(1)
Published: Nov. 23, 2023
Abstract With plenty of popular and effective ternary organic solar cells (OSCs) construction strategies proposed applied, its power conversion efficiencies (PCEs) have come to a new level over 19% in single-junction devices. However, previous studies are heavily based chloroform (CF) leaving behind substantial knowledge deficiencies understanding the influence solvent choice when introducing third component. Herein, we present case where newly designed asymmetric small molecular acceptor using fluoro-methoxylated end-group modification strategy, named BTP-BO-3FO with enlarged bandgap, brings different morphological evolution performance improvement effect on host system PM6:BTP-eC9, processed by CF ortho-xylene ( o -XY). detailed analyses supported series experiments, best PCE 19.24% for green solvent-processed OSCs is found be fruit finely tuned crystalline ordering general aggregation motif, which furthermore nourishes favorable charge generation recombination behavior. Likewise, can achieved replacing spin-coating blade coating active layer deposition. This work focuses commonly met yet frequently ignored issues building blends demonstrate cutting-edge device performance, hence, will instructive other OSC works future.
Language: Английский
Citations
56
SusMat, Journal Year: 2025, Volume and Issue: unknown
Published: March 17, 2025
ABSTRACT All‐polymer solar cells (all‐PSCs) are of interest owing to their unique advantages, including remarkably improved device stability and exceptional mechanical stretchability. Over recent years, there has been a notable increase in the power conversion efficiency (PCE) all‐PSCs, largely attributed advancements morphology control active layer. Notably, domain size is paramount importance as it impacts critical factors such exciton dissociation, charge transport, collection. However, low glass transition temperature conjugated polymers, coupled with minimal change mixing entropy, often results an excessive degree phase separation. Consequently, essential comprehend evolution separation develop strategies regulate size. In this review, we elucidate key parameters that contribute enhancement present qualitative quantitative characterization techniques for Building on foundation, introduce principles regulating sizes, encompassing crystallinity, miscibility, molecular conformation from thermodynamic perspective, well film‐forming kinetics crystallization sequence kinetic perspective. Lastly, offer insights into current challenges potential future prospects all‐PSCs.
Language: Английский
Citations
3
Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 474, P. 145531 - 145531
Published: Aug. 19, 2023
Language: Английский
Citations
24
Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(12), P. 5863 - 5870
Published: Jan. 1, 2023
The energy disorder of binary all-PSCs based on PDBQ x -TCl and PY-IT is suppressed by adding a new small molecule (BTA3-4F), leading to an impressive power conversion efficiency 18.6%.
Language: Английский
Citations
23
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(19)
Published: Jan. 11, 2024
Abstract To achieve commercial application of organic solar cells (OSCs), it is necessary to reduce material costs and improve device efficiency. This paper reports on the utilization a multifunctional building block, namely 3‐cyanoesterthiophene, which exhibits simple structure accessibility synthetic for cost‐effective high‐performance polymer donors (PDs). Meanwhile, ternary terpolymerization strategies have been studied. Two similar PDs, PBTCl0‐TCA PBTCl100‐TCA, are synthesized, devices exhibit less‐than‐satisfactory efficiency 13.21% 11.53% due mismatching energy level imperfect morphology. The two PDs with comparable structures commendable compatibility easily form alloy‐like phase in active layer, can effectively boost 14.17% retained high J SC significant improved open‐circuit voltage ( V OC ) fill factor (FF). Encouraged by blending phenomenon, donor (PBTCl50‐TCA) same ratio random designed. And over 17% binary OSCs using demonstrated. synergies incorporation cyanoester‐group terpolymer endow developed deep‐lying levels, face‐on orientation, thermodynamic miscibility prevailing nonfullerene acceptor appropriate crystallinity. findings study provide valuable insights support advancement PDs.
Language: Английский
Citations
15
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(10)
Published: Jan. 8, 2024
Abstract End‐groups halogenation strategies, generally refers to fluorination and chlorination, have been confirmed as simple efficient methods regulate the photoelectric performance of non‐fullerene acceptors (NFAs), but a controversy over which one is better has existed for long time. Here, two novel NFAs, C9N3‐4F C9N3‐4Cl, featured with different end‐groups were successfully synthesized blended renowned donors, D18 PM6, electron‐withdrawing units. Detailed theoretical calculations morphology characterizations interface structures indicate NFAs based on possess binding energy miscibility shows an obvious influence phase‐separation morphology, charge transport behavior device performance. After verified by other three pairs reported universal conclusion obtained devices fluorination‐end‐groups‐based PM6 chlorination‐end‐groups‐based show excellent efficiencies, high fill factors stability. Finally, D18: PM6: C9N3‐4Cl yield outstanding efficiency 18.53 % 18.00 %, respectively. Suitably selecting donor regulating donor/acceptor can accurately present conversion ability points out way further molecular design selection high‐performance stable organic solar cells.
Language: Английский
Citations
14
Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(21)
Published: Feb. 22, 2024
Abstract All‐polymer solar cells (all‐PSCs) have been regarded as one of the most promising candidates for commercial applications owing to their outstanding advantages such mechanical flexibility, light weight and stable film morphology. However, compared large amount new‐emerging excellent polymer acceptors, development high‐performance donor lags behind. Herein, a new D‐π‐A type donor, namely QQ1, was developed based on dithienoquinoxalineimide (DTQI) A unit, benzodithiophene with thiophene‐conjugated side chains (BDTT) D alkyl‐thiophene π‐bridge, respectively. QQ1 not only possesses strong dipole moment, but also shows wide band gap 1.80 eV deep HOMO energy level −5.47 eV, even without halogen substituents that are commonly indispensable donors. When blended classic acceptor PY‐IT, QQ1‐based all‐PSC delivers an PCE 18.81 %. After introduction F‐BTA3 third component, record 19.20 % obtained, highest value reported so far all‐PSCs. The impressive photovoltaic performance originates from broad absorption range, reduced loss, compact π–π stacking. These results provide insight in rational design novel nonhalogenated donors further
Language: Английский
Citations
12
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(47)
Published: Aug. 13, 2024
Abstract Tuning full‐color emission of polymers holds significant promise. However, preparing unconventional luminescence with color‐tunability in dilute solution and understanding the relationship between non‐covalent interactions luminescent behavior remains a great challenge. We report two emitters (P1 P2) incorporating tetracoordinate boron. The P1 non‐conjugated D‐π‐A structure, exhibited red delayed fluorescence at 645 nm quantum yield 9.15 % aggregates. Notably, wavelength can be tuned from 418 to 588 different solvent. Similarly, P2 also adjusted by manipulating solvent fluorophore. Experimental characterization theoretical calculations indicate that B←N bond electronic fluorophore significantly regulate equilibrium electrostatic potential (ESP) intramolecular O⋅⋅⋅O P1, thereby modulating its wavelength. Additionally, these showed excellent fluoride ions detection. This work provides new insights into complex effects intermolecular on properties.
Language: Английский
Citations
10
Macromolecules, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 10, 2025
Unconventional fluorescent polymers have attracted wide attention due to their excellent biocompatibility, facile preparation, and unique properties. However, developing high-performance revealing the emission mechanism are still challenging. Herein, explore relationship between chemical structures properties, four hyperbranched poly(silicophosphate) esters (HSiP0-HSiP3) were prepared. Increasing P═O(O)3:Si(O)3 ratios generated enhanced red fluorescence. Experimental theoretical calculation results showed that n-π interactions P═O O/N atoms promoted concentration of negative electrostatic potential spatial electronic communications, then decreased energy gap strong emission. Meanwhile, cluster functional groups a charge isolated groups, which further Additionally, these in bacterial imaging information encryption. Thus, this work provides an efficient method for long-wavelength materials while providing new insights into origin.
Language: Английский
Citations
1