Synthetic Metals, Год журнала: 2024, Номер unknown, С. 117773 - 117773
Опубликована: Окт. 1, 2024
Язык: Английский
Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown
Опубликована: Окт. 30, 2024
Abstract Oligomeric acceptors (OAs) have attracted considerable attention in the organic photovoltaics (OPV) field owing to their capacity balancing merits from both monomeric and polymeric acceptors. A delicate control over distortion between blocks of OAs usually determines performance stability relevant OPV devices. However, it imposes great complexity realize a controllable degree by tuning skeleton position linker blocks. Herein, we developed facile strategy rationally geometry via straightforward substitution alkoxy side‐chains on This helps elucidate integrated influences molecular non‐bonded contacts selective interactions OA molecules host acceptor ternary blend. We demonstrate alkoxy‐OA having stronger self‐interactions would mitigate with acceptor, therefore alleviating kinetic diffusion excessive aggregation total Combining composite‐interlayer introducing phenyl‐substituted self‐assembled monolayer enhance doping polyoxometalate, an impressive efficiency 20.1 % is achieved accompanied negligible burn‐in loss against physical aging. study demonstrates validation towards high‐performance burn‐in‐free OPV.
Язык: Английский
Процитировано
8
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Дек. 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
Язык: Английский
Процитировано
8
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 27, 2024
Abstract Despite significant improvements in power conversion efficiencies (PCEs) of organic solar cells (OSCs), achieving excellent stability remains a great challenge to their commercial feasibility. Here, U ‐shaped dimeric acceptors (5‐IDT and 6‐IDT) with different molecular lengths are introduced into the binary OSCs as third component, respectively. The introduction component effectively reduces energetic disorder non‐radiative voltage losses improves exciton dissociation charge transport devices. Consequently, PCEs 6‐IDT‐ 5‐IDT‐treated significantly improved 19.32% 19.96%, respectively, which is highest PCE for oligomeric acceptors‐based ternary date. Meanwhile, thermal treated devices dramatically improved, initial efficiency retention increasing from 18% 32% 75%, after 1000 h stress. This mainly attributed ability smaller length 5‐IDT stabilize phase‐separated morphology polymeric donor small acceptor, rather than high glass transition temperature low diffusion coefficient.
Язык: Английский
Процитировано
7
ACS Energy Letters, Год журнала: 2024, Номер 9(11), С. 5541 - 5549
Опубликована: Окт. 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.
Язык: Английский
Процитировано
5
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Сен. 18, 2024
Abstract High efficiency, stability, and flexibility are key prerequisites for the commercial applications of organic solar cells (OSCs). Herein, three back‐to‐back connected dimers (2Qx‐TT, 2Qx‐C3, 2Qx‐C6) developed as guest acceptors OSCs with improved comprehensive performance. By regulating linkage from rigid bithiophene to flexible alkyl chain, display quite different molecular geometry intermolecular interactions, consequently influencing their packing arrangement, film‐forming process, carrier mobilities, device flexibility. introducing these dimer into active layer, form alloy phases host acceptor, promoting process charge dynamics. All ternary devices exhibit PCEs over 18% than control binary device. Among them, 2Qx‐C3‐based obtains best efficiency high 19.03%. Moreover, thanks stronger entanglement favored by linkage, PM6:BTP‐eC9:2Qx‐C3‐based shows outstanding stability The displays an PCE 16.09% a crack‐onset strain 15.0%, showing excellent mechanical robustness close all‐polymer devices. This work demonstrates potential highly efficient, stable OSCs.
Язык: Английский
Процитировано
4
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Сен. 24, 2024
Abstract Recent studies on narrow bandgap all‐conjugated block copolymer (BCP) single‐material–organic solar cells (SMOSCs) have made unprecedented progress in power conversion efficiency (PCE); however, it still lacks understanding of the structure‐property relationship these highly mixed materials. Herein, impact different synthetic protocols (direct synthesis ( d ‐BCP) versus sequential s ‐BCP)) is first investigated relevant photovoltaic properties. Targeting same BCP, namely PBDB‐T‐ b ‐PYIT, found that change polymerization reaction leads to quite optical and transport The ‐BCP outputs a record‐high PCE 15.02% for SMOSCs as well enhanced operation stability under simulated 1‐sun illumination, which significantly higher than (10.33%) even close its bulk heterojunction (BHJ) counterparts. Detailed transient absorption spectroscopy reveals ultrafast dynamics charge transfer (CT) exciton dissociation BCP. In together with morphology characterization, revealed has more phase pure composition, molecular ordering, intramolecular CT relative those ‐BCP. These findings gain insight into both structure carrier dynamic BCP demonstrate possibility achieving high‐efficiency stable SMOSCs.
Язык: Английский
Процитировано
4
Advanced Energy Materials, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 14, 2024
Abstract Molecular stacking behavior exerts a significant influence on the blend film morphology of organic solar cells (OSCs), further affecting device performance and stability. Modulation molecular structure, such as central unit end‐group, can profoundly impact this process. Herein, four quinoxaline (Qx)‐fused‐core‐based non‐fullerene acceptors (NFAs), Qx‐N4F Qx‐ o/m/p ‐N4F are synthesized combining π‐extended end‐groups optimized units. The isomeric fluorinated units lead to changes in local dipole moments electrostatic potential distribution, which influences pattern photoelectronic properties NFAs. Consequently, binary ternary devices based PM6:Qx‐ p achieve superior power conversion efficiencies (PCE) up 18.75% 19.48%, respectively. Grazing‐incidence wide‐angle X‐ray scattering (GIWAXS) characterization reveals ‐N4F's stronger crystallinity, aggregation, donor–acceptor interactions, separately enhance short‐circuit current density ( J SC ) fill factor (FF) through higher phase purity tighter maintaining more interfaces. Furthermore, ‐N4F‐based demonstrate exceptional thermal stability, retaining 93.2% initial PCE value after 3000 h heating due best morphological stability with most stable structure. These results underscore significance synergistic optimization NFAs conjugation expansion halogenation substitution for obtaining efficient OSCs.
Язык: Английский
Процитировано
4
Polymer science & technology., Год журнала: 2025, Номер unknown
Опубликована: Фев. 27, 2025
Язык: Английский
Процитировано
0
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 4, 2025
Abstract The contradiction between high transmittance and favorable conductivity poses a great challenge in developing effective cathode interlayer (CIL) materials with sufficient thickness tolerance, which hinders the further advancement of organic solar cells (OSCs). Herein, completely new class alcohol processable polyimide‐ionene hybrids (PIIHs) is proposed by melding pyromellitic diimide (PMD) subunits into imidazolium‐based ionenes backbone covalently. These PIIHs, named PMD‐DI PMD‐PD, boast transparency, suitable energy levels, decent conductivity. A higher PMD content endows PMD‐PD improved work function tunability, electrical properties, crystallinity, enabling as CIL material excellent thickness‐insensitive characteristics, while simultaneously improving device stability significantly. Furthermore, also exhibits good compatibility various electrodes active layers, offering cell efficiencies up to 19.91% 19.29% Ag Cu cathodes, respectively. More importantly, application can improve performance semi‐transparent OSCs without losing transmittance, thereby drastically enhancing light utilization efficiency 4.04% an ultrathin, low‐cost cathode, that competes leading optical modulation‐free semitransparent expensive cathodes. This opens pathway realize transparent conductive interlayers strategic molecular design, highly efficient, stable, cost‐effective for diverse applications.
Язык: Английский
Процитировано
0
Nano Energy, Год журнала: 2025, Номер unknown, С. 111085 - 111085
Опубликована: Май 1, 2025
Язык: Английский
Процитировано
0