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

et al.

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

Improving the Stability of Organic Solar Cells: From Materials to Devices DOI Open Access
Yanxun Li, Kai‐Kai Liu, Francis Lin

et al.

Solar RRL, Journal Year: 2023, Volume and Issue: 7(20)

Published: Aug. 24, 2023

Organic solar cells (OSCs) are a promising emerging photovoltaic technology for energy conversion. Recently, the power conversion efficiencies of OSCs have been improved to get closer their Schottky–Queisser limit. However, operational stability remains as major challenge ahead deployment practical applications. The main causes OSC instability stem from poor intrinsic materials, metastable morphology multicomponent active layer, unstable interfaces, and sensitivity moisture oxygen. To address these issues, it is necessary comprehensive in‐depth understanding fundamentals develop an integrated solution overcome them. Herein, state‐of‐art strategies used improve aspects material design, device processing, encapsulation techniques, in hope delivering rational solutions, summarized. In end, prospects toward future development efficient stable provided.

Language: Английский

Citations

35
Siloxane-induced robust photoactive materials with high humidity tolerance for ambient processing of organic solar cells DOI
Haizhen Liu, Dong Yuan, Haiying Jiang

et al.

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(8), P. 3474 - 3485

Published: Jan. 1, 2023

Photoactive materials comprising a siloxane-terminated side chain could enable active layers with high humidity tolerance and maintain efficiency.

Language: Английский

Citations

25
Selectively Modulating Componential Morphologies of Bulk Heterojunction Organic Solar Cells DOI Open Access
Xinyu He, Zhi‐Xi Liu, Hongzheng Chen

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(7)

Published: Oct. 9, 2023

Abstract Achieving precise control over the nanoscale morphology of bulk heterojunction films presents a significant challenge for conventional post‐treatments employed in organic solar cells (OSCs). In this study, near‐infrared photon‐assisted annealing (NPA) strategy is developed fabricating high‐performance OSCs under mild processing conditions. It revealed top NIR light illumination, together with bottom heating, enables selective tuning molecular arrangement and assembly narrow bandgap acceptors polymer networks to achieve optimal morphologies, as well acceptor‐rich surface active layers. The derived exhibit remarkable power conversion efficiency (PCE) 19.25%, representing one highest PCEs reported binary so far. Moreover, via NPA strategy, it has succeeded accessing top‐illuminated flexible using thermolabile polyethylene terephthalate from mineral water bottles, displaying excellent mechanical stabilities. Overall, work will hold potential develop various substrates.

Language: Английский

Citations

25
Suppression of energy disorder by incorporating a small-molecule acceptor into binary all-polymer solar cells DOI
Ye Xu, Jingwen Wang, Tao Zhang

et al.

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
Developing Efficient Benzene Additives for 19.43% Efficiency of Organic Solar Cells by Crossbreeding Effect of Fluorination and Bromination DOI

Yiyan Ran,

Chengxu Liang,

Zhihao Xu

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(8)

Published: Nov. 12, 2023

Abstract Employing volatile solid additives have emerged as a promising method to optimize the morphology and improve performance of organic solar cells (OSCs). However, principles governing efficient design remain elusive. Herein, programmed fluorination and/or bromination on benzene core develop for OSCs is reported. The endow five halogen derivatives, 1,3,5‐trifluorobenzene, hexafluorobenzene, 1,3,5‐tribromo‐2,4,6‐trifluorobenzene (TFTB), 1,3,5‐tribromobenzene, hexabromobenzene, with different melting boiling points, volatility, well interactions host blend. Studies indicate that extremely high low volatility are almost powerless even detrimental evolution. Among them, combination fluorine bromine atoms TFTB not only enables more appropriate m.p./b.p. but also exerts stronger molecular blend, giving rise higher ordered packing favorable morphology. Importantly, exhibits good universality performances power conversion efficiencies (PCEs; over 18%) in group binary blend systems, an impressive PCE 19.43% ternary PBTz‐F:PM6:L8‐BO system.

Language: Английский

Citations

23
The Influence of Donor/Acceptor Interfaces on Organic Solar Cells Efficiency and Stability Revealed through Theoretical Calculations and Morphology Characterizations DOI
Jingyu Shi,

Kexuan Sun,

Zhenyu Chen

et al.

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
In‐Situ Removable Solid Additive Optimizing Active Layer and Cathode Interlayer of Organic Solar Cells DOI

Lingchen Kong,

Xinkang Wang,

Mingke Li

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(40)

Published: July 21, 2024

Abstract In situ removable (ISR) solid additive can employ cold sublimation process to optimize active layer morphology for organic solar cells (OSCs), thus remaining unique potential. Herein, a feasible guideline is proposed discover new ISR 1‐bromo‐4‐chlorobenzene (CBB), whose removing time ( T R ) between those of reported additives 1,4‐dichlorobenzene (DCB) and 1‐chloro‐4‐iodobenzene (CIB). The CBB with moderate beneficial affording the optimal achieving highest power conversion efficiency (PCE) 18.58% D18:L8‐BO binary layer, as supported by most efficient exciton splitting, fastest transfer, balanced carrier transports. Due ability, DCB, CBB, CIB are further aggregation PDINN cathode interlayer. Particularly, CBB‐ CIB‐treated interlayers afforded based OSCs excellent PCEs 19.38% 19.26%, along remarkable fill factors 80.98% 81.37%, respectively. suppress non‐radiative recombination devices, resulting in higher open‐circuit voltage. This work not only provides an effective approach flourish but also expands application OSCs.

Language: Английский

Citations

13
Recent development in solid additives enables high-performance organic solar cells DOI

Waqar Ali Memon,

Zihao Deng, Feng He

et al.

EnergyChem, Journal Year: 2024, Volume and Issue: 6(4), P. 100129 - 100129

Published: June 15, 2024

Language: Английский

Citations

12
Synergistically optimizing the optoelectronic properties and morphology using a photo-active solid additive for high-performance binary organic photovoltaics DOI
Mengting Wang, Tianyi Chen,

Yaokai Li

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(7), P. 2598 - 2609

Published: Jan. 1, 2024

This work explores a new solid additive with TADF properties for high-performance OPVs. The fine-tunes the morphology and enhances exciton diffusion dissociation, resulting in an efficiency of 19.4%, making it one top binary

Language: Английский

Citations

11
Regulating Electron‐Phonon Coupling by Solid Additive for Efficient Organic Solar Cells DOI

Zhongwei Ge,

Jiawei Qiao,

Yun Li

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(1)

Published: Aug. 30, 2024

Strong electron-phonon coupling can hinder exciton transport and induce undesirable non-radiative recombination, resulting in a shortened diffusion distance constrained dissociation organic solar cells (OSCs). Therefore, suppressing is crucially important for achieveing high-performance OSCs. Here, we employ the solid additive to regulating The planar configuration of SA1 confers significant advantage lattice vibrations active layers, reducing scattering excitons by phonons. Consequently, slow but sustained hole transfer process identified SA1-assisted film, indicating an enhancement efficiency. Prolonged length lifetime are achieved blend film processed with SA1, attributed low recombination rate energetic disorder charge carrier transport. As result, high efficiency 20 % was ternary device remarkable short-circuit current. This work highlights role improving photovoltaic performance

Language: Английский

Citations

11