Volatile Additive Assists Binary Layer‐by‐Layer Solution Processing Organic Solar Cells to Achieve 19% Efficiency DOI

Luye Cao,

Hengyuan Zhang,

Xiaoyang Du

и другие.

Chinese Journal of Chemistry, Год журнала: 2024, Номер 42(24), С. 3581 - 3587

Опубликована: Ноя. 4, 2024

Comprehensive Summary Layer‐by‐layer (LbL) solution processing is an efficient method to realize high performance organic solar cells (OSCs). One of the drawbacks LbL‐processed active layer large difference in crystallinity donor and acceptor, which will lead imbalance charge transfer result unfavorable recombination. Herein, we combined a novel volatile additive 3,5‐dichloro‐2,4,6‐ trifluorobenzotrifluoride (DTBF) with LbL high‐efficiency OSCs. DTBF interacts non‐fullerene acceptor BTP‐4F by non‐covalent bonding, enhances compact stacking BTP‐4F. doped OSC has balanced electron transport properties, longer carrier lifetime, higher exciton dissociation collection efficiencies, lower energetic disorder than control without any additives. Benefiting from optimization dynamics micro‐morphology DTBF, binary achieved synergistic improvements open‐circuit voltage, short‐circuit current density fill factor. As result, champion power conversion efficiency ( PCE ) 19% realized for DTBF‐optimized OSC, superior (17.55%). This work demonstrates promising approach modulate morphology fabricate

Язык: Английский

Understanding photochemical degradation mechanisms in photoactive layer materials for organic solar cells DOI Creative Commons
Jianhua Han, Han Xu, Sri Harish Kumar Paleti

и другие.

Chemical Society Reviews, Год журнала: 2024, Номер 53(14), С. 7426 - 7454

Опубликована: Янв. 1, 2024

Over the past decades, field of organic solar cells (OSCs) has witnessed a significant evolution in materials chemistry, which resulted remarkable enhancement device performance, achieving efficiencies over 19%. The photoactive layer OSCs play crucial role light absorption, charge generation, transport and stability. To facilitate scale-up OSCs, it is imperative to address photostability these electron acceptor donor materials, as their photochemical degradation process remains challenge during photo-to-electric conversion. In this review, we present an overview development emphasizing aspects chemical stability behavior that are linked OSCs. Throughout each section, highlight pathways for link degradation. We also discuss existing interdisciplinary challenges obstacles impede photostable materials. Finally, offer insights into strategies aimed at enhancing future directions developing photo-active layers, facilitating commercialization

Язык: Английский

Процитировано

15

Halogenated Dibenzo[f,h]quinoxaline Units Constructed 2D‐Conjugated Guest Acceptors for 19% Efficiency Organic Solar Cells DOI Creative Commons

Jingshun Gao,

Hairui Bai,

Ping Li

и другие.

Advanced Science, Год журнала: 2024, Номер 11(31)

Опубликована: Июнь 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

Язык: Английский

Процитировано

14

Halogenation Engineering of Solid Additives Enables 19.39% Efficiency and Stable Binary Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Both Donor and Acceptor Components DOI

Wenyan Su,

Xuming Zhou,

Qiang Wu

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 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.

Язык: Английский

Процитировано

10

Conjugated π-Extension of Small Molecular Nonfullerene Acceptor for Efficient Ternary Organic Solar Cells with an Efficiency of 19.10% DOI
Cheng Luo, Dongdong Xia,

Jie Wu

и другие.

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

In this study, we have successfully incorporated a small molecular acceptor, Y-LC, with conjugated π-extension as secondary acceptor in the PM6:BTP-eC9-based organic photovoltaics. The performance of device was significantly promoted from 18.45% binary system PM6:BTP-eC9 to over 19% ternary minimal Y-LC loading. This enhancement can be attributed alloy-like structures acceptors and optimized active layer morphology, which leads improved hole electron mobilities, thereby suppressing charge recombination, finally resulting higher photocurrent solar cells. Furthermore, complementary absorption is observed PM6 BTP-eC9, broaden spectrum photoactive enable more photons sunlight absorbed. Additionally, facilitates efficient transfer donor by forming cascade energy levels between BTP-eC9. These advantages collectively contribute superior obtained work also highlights that adoption nonfullerene suitable π-extensions minor additive photovoltaics powerful approach for achieving state-of-the-art

Язык: Английский

Процитировано

1

Precise Control Over Crystallization Kinetics by Combining Nucleating Agents and Plasticizers for 20.1% Efficiency Organic Solar Cells DOI Open Access
Bowen Cheng, Xinxin Xia,

Sixuan Cheng

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Abstract Obtaining controllable active layer morphology plays a significant role in boosting the device performance of organic solar cells (OSCs). Herein, quaternary strategy, which incorporates polymer donor D18‐Cl and small molecule acceptor AITC into host D18:N3, is employed to precisely modulate crystallization kinetics for favorable evolution within layer. In situ spectroscopic measurements during film‐formation demonstrate that while works as nucleator promote aggregation D18 foster donor/acceptor intermixing, has exactly opposite impact on N3 intermixing acceptor, working plasticizer. The mutually compensational effect dual‐guests, result, enables synergistic control over fibrillar networks, multi‐length scale morphology, vertical phase distribution, leading optimized 3D greatly enhanced exciton dissociation charge transfer, suppressed recombination, reduced energy loss. Consequently, OSCs based D18:D18‐Cl:N3:AITC achieved an excellent power conversion efficiency 20.1%, represents one highest efficiencies single‐junction OSCs. This work presents effective strategy regulate toward advanced high‐performance

Язык: Английский

Процитировано

1

Dimeric Small Molecule Acceptors via Terminal‐End Connections: Effect of Flexible Linker Length on Photovoltaic Performance DOI Open Access
Zhengkai Li, Qingyuan Wang, Qi Chen

и другие.

Macromolecular Rapid Communications, Год журнала: 2024, Номер unknown

Опубликована: Сен. 3, 2024

Abstract The dimerization of small molecule acceptors (SMAs) holds significant potential by combining the advantages both SMAs and polymer in realizing high power conversion efficiency (PCE) operational stability organic solar cells (OSCs). However, advancements selection innovation dimeric linkers are still challenging enhancing their performance. In this study, three new acceptors, namely DY‐Ar‐4, DY‐Ar‐5, DY‐Ar‐6 synthesized, linking two Y‐series SMA subunits via an “end‐to‐end” strategy using flexible spacers (octyl, decyl, dodecyl, respectively). influence spacer lengths on device performance is systematically investigated. results indicate that DY‐Ar‐5 exhibits more compact ordered packing, leading to optimal morphology. OSCs based PM6: achieves a maximum PCE 15.76%, attributes enhance balance carrier mobility, reduce recombination. This suitable non‐conjugated units provides rational principle for designing high‐performance non‐fullerene acceptors.

Язык: Английский

Процитировано

4

Weak Absorptive Component Boosts Exciton Dissociation in Indoor Organic Photovoltaics DOI Open Access

Zhenchuan Wen,

Jiawei Qiao,

Yuying Yang

и другие.

Chinese Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Comprehensive Summary Indoor organic photovoltaic (OPV) cells have emerged as promising candidates for harvesting energy from artificial light sources. However, the limited spectral range and low photon flux of indoor sources restrict photocurrent power output these devices. In this work, we investigate role a weak absorptive third component in enhancing exciton dissociation improving OPV performance. By introducing eC9‐2Cl into D18‐Cl:F‐BTA3 binary system, create ternary blend that demonstrates significant improvements device efficiency. Transient absorption spectroscopy time‐resolved photoluminescence measurements reveal facilitates efficient transfer dissociation. Under lighting conditions, where acts component, devices exhibit conversion efficiency increase 24.7% to 26.2%. These findings highlight potential components optimizing processes overcoming limitations systems.

Язык: Английский

Процитировано

0

Non‐Halogenated Solvent Processed Ternary All‐Polymer Solar Cell with PCE of 18.55% Enabled by Two Compatible Polymer Acceptors DOI Creative Commons

Rouren Chen,

Tianyi Zhang,

Qiqing Ruan

и другие.

Chinese Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Май 29, 2025

Comprehensive Summary Herein, a theory‐guided ternary construction case on boosting power conversion efficiency (PCE) for all‐polymer solar cell (all‐PSC) is reported, where guest acceptor's characteristics include high miscibility with host polymer acceptor, significantly larger optical bandgap, and improved luminescence. Consequently, only 10 wt% PFFO‐Th (third component) addition, the PCE of binary control promoted to 18.55% from 16.69%, 11.1% relative increase, demonstrating great effectiveness this strategy. Besides, realized at state‐of‐the‐art level all‐PSCs processed by ortho ‐xylene, widely acknowledged green non‐ halogenated solvent field. This study shares new thought designing high‐performance photovoltaic devices reduced energy losses favorable charge dynamics, which would nourish future development all‐PSCs, even other organic electronics.

Язык: Английский

Процитировано

0

Volatile Additive Assists Binary Layer‐by‐Layer Solution Processing Organic Solar Cells to Achieve 19% Efficiency DOI

Luye Cao,

Hengyuan Zhang,

Xiaoyang Du

и другие.

Chinese Journal of Chemistry, Год журнала: 2024, Номер 42(24), С. 3581 - 3587

Опубликована: Ноя. 4, 2024

Comprehensive Summary Layer‐by‐layer (LbL) solution processing is an efficient method to realize high performance organic solar cells (OSCs). One of the drawbacks LbL‐processed active layer large difference in crystallinity donor and acceptor, which will lead imbalance charge transfer result unfavorable recombination. Herein, we combined a novel volatile additive 3,5‐dichloro‐2,4,6‐ trifluorobenzotrifluoride (DTBF) with LbL high‐efficiency OSCs. DTBF interacts non‐fullerene acceptor BTP‐4F by non‐covalent bonding, enhances compact stacking BTP‐4F. doped OSC has balanced electron transport properties, longer carrier lifetime, higher exciton dissociation collection efficiencies, lower energetic disorder than control without any additives. Benefiting from optimization dynamics micro‐morphology DTBF, binary achieved synergistic improvements open‐circuit voltage, short‐circuit current density fill factor. As result, champion power conversion efficiency ( PCE ) 19% realized for DTBF‐optimized OSC, superior (17.55%). This work demonstrates promising approach modulate morphology fabricate

Язык: Английский

Процитировано

2