Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: March 26, 2025
Language: Английский
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(33)
Published: May 29, 2024
Designing and synthesizing narrow band gap acceptors that exhibit high photoluminescence quantum yield (PLQY) strong crystallinity is a highly effective, yet challenging, approach to reducing non-radiative energy losses (▵E
Language: Английский
Citations
60
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(19)
Published: Jan. 14, 2024
Abstract As simple and versatile tools, additives have been widely used to refine active layer morphology played a crucial role in boosting the power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, three novel solvent named Th‐FSi, Th‐ClSi, Th‐BrSi with same backbone 2,5‐bis(trimethylsilyl)thiophene are designed synthesized by substituting different halogens fluorine, chlorine, bromine, respectively. Notably, Th‐ClSi exhibits more significant dipole moment engages non‐covalent interactions small‐molecule acceptor (SMA) L8‐BO, which slight adjustments intermolecular interaction, crystallinity, molecular packing PM6:L8‐BO layer. Consequently, OSCs incorporating outperform their Th‐FSi counterparts photo‐capturing, reduced energy loss, superior exciton dissociation, charge transfer properties, out‐coming yields an enhanced PCE 18.29%. Moreover, integrating near‐infrared absorbing SMA (BTP‐eC9) guest into matrix, absorption spectrum span 880–930 nm, resultant ternary achieve commendable 19.17%, ranking among highest efficiencies reported date is expanded. These findings underscore promise halogenated thiophene‐based as potent avenue for morphological fine‐tuning consequent enhancement OSCs.
Language: Английский
Citations
37
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(30)
Published: June 5, 2024
Abstract Leveraging breakthroughs in Y‐series nonfullerene acceptors (NFAs), organic solar cells (OSCs) have achieved impressive power conversion efficiencies (PCEs) exceeding 19%. However, progress advancing OSCs has decelerated due to constraints realizing the full potential of NFAs. Herein, a simple yet effective solid additive‐induced preaggregation control method employing 2‐chloro‐5‐iodopyridine (PDCI) is reported unlock Specifically, PDCI interacts predominantly with NFAs enabling enhanced and ordered phase‐aggregation solution. This leads notable improvement redshifted absorption acceptor phase during film formation, along improved crystallinity. Moreover, PDCI‐induced solution enables molecule packing film‐formation process through delicate intermediate states transition. Consequently, preaggregated significantly improves PCE PM6:Y6 from 16.12% 18.12%, among best values for OSCs. Importantly, this approach universally applicable other NFA‐based OSCs, achieving champion 19.02% PM6:BTP‐eC9 system. Thus, strategy further unlocks NFAs, offering promising avenue enhancing photovoltaic performance
Language: Английский
Citations
18
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
14
EnergyChem, Journal Year: 2024, Volume and Issue: 6(4), P. 100129 - 100129
Published: June 15, 2024
Language: Английский
Citations
13
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 22, 2024
Abstract Solution‐processed bulk heterojunction (BHJ) organic solar cells (OSCs) have emerged as a promising next‐generation photovoltaic technology. In this emerging field, there is growing trend of employing solid additives (SAs) to fine‐tune the BHJ morphology and unlock full potential OSCs. SA engineering offers several significant benefits for commercialization, including ability i) control film‐forming kinetics expedite high‐throughput fabrication, ii) leverage weak noncovalent interactions between materials enhance efficiency stability OSCs, iii) simplify procedures facilitate cost‐effective production scaling‐up. These features make key catalyst accelerating development Recent breakthroughs shown that can achieve an 19.67% in single‐junction demonstrating its effectiveness promoting commercialization devices. This review provides comprehensive overview pivotal contributions SAs, focusing on their roles governing dynamics, stabilizing phase separation, addressing other crucial aspects. The rationale design rules SAs highly efficient stable OSCs are also discussed. Finally, remaining challenges summarized, perspectives future advances offered.
Language: Английский
Citations
12
Advanced Science, Journal Year: 2024, Volume and Issue: 11(23)
Published: March 25, 2024
Abstract Volatile solid additives have attracted increasing attention in optimizing the morphology and improving performance of currently dominated non‐fullerene acceptor‐based organic solar cells (OSCs). However, underlying principles governing rational design volatile remain elusive. Herein, a series efficient are successfully developed by crossbreeding effect chalcogenation iodination for photovoltaic performances OSCs. Five benzene derivatives 1,4‐dimethoxybenzene (DOB), 1‐iodo‐4‐methoxybenzene (OIB), 1‐iodo‐4‐methylthiobenzene (SIB), 1,4‐dimethylthiobenzene (DSB) 1,4‐diiodobenzene (DIB) systematically studied, where widely used DIB is as reference. The on overall property comprehensively investigated, which indicates that versatile functional groups provided various types noncovalent interactions with host materials modulating morphology. Among them, SIB combination sulphuration enabled more appropriate blend, giving rise to highly ordered molecular packing favorable As result, binary OSCs based PM6:L8‐BO PBTz‐F:L8‐BO well ternary PBTz‐F:PM6:L8‐BO achieved impressive high PCEs 18.87%, 18.81% 19.68%, respectively, among highest values
Language: Английский
Citations
10
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 3, 2024
Abstract By selectively interacting with acceptor components, various typed solid additives achieve boosted power conversion efficiency (PCE) in organic solar cells (OSCs). However, due to the efficient active layer being composed of donor and materials, it is difficult obtain desired morphology by manipulating component alone, limiting further improvement PCEs. Herein, two a same backbone thiophene‐benzene‐thiophene (halogen‐free D1‐H) but different halogen substituents (fluorinated D1‐F chlorinated D1‐Cl) are developed probe working mechanism halogenated variation OSCs. Unlike D1‐H continuous charge distributions, D1‐Cl show isolated positive distribution benzene‐core negative thiophene, offering stronger non‐covalent interactions both (PM6) (L8‐BO), especially D1‐Cl. Consequently, D1‐Cl‐treated obtains an optimized phase separation improved molecular packing, boosting PCE 18.59% device stability OSCs, 17.62% for D1‐H‐treated counterparts. Moreover, using D18:L8‐BO D18:BTP‐eC9 as layers, binary OSCs impressive PCEs 19.29% 19.39%, respectively. This work indicates that halogenation engineering can effectively regulate improving elucidates underlying mechanism.
Language: Английский
Citations
10
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
10
Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 164, P. 100977 - 100977
Published: March 18, 2025
Language: Английский
Citations
2