Efficiency Boost in All‐Small‐Molecule Organic Solar Cells: Insights from the Re‐Ordering Kinetics DOI
Xiaokang Sun, Jie Lv, Fei Wang

et al.

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(3)

Published: Nov. 21, 2023

Abstract Achieving high‐performance in all‐small‐molecule organic solar cells (ASM‐OSCs) significantly relies on precise nanoscale phase separation through domain size manipulation the active layer. Nonetheless, for ASM‐OSC systems, forging a clear connection between tuning of and intricacies proves to be formidable challenge. This study investigates intricate interplay adjustment creation optimal morphology, crucial ASM‐OSCs’ performance. It is demonstrated that exceptional layer achieved by meticulously controlling continuity uniformity domains via re‐packing process. A series halogen‐substituted solvents (Fluorobenzene, Chlorobenzene, Bromobenzene, Iodobenzene) adopted tune kinetics, ASM‐OSCs treated with CB exhibited an impressive 16.2% power conversion efficiency (PCE). The PCE enhancement can attributed gradual crystallization process, promoting smoothly interconnected uniformly distributed size. This, turn, leads favorable enhanced charge transfer, extended carrier lifetime, consequently, reduced recombination free charges. findings emphasize pivotal role kinetics achieving ASM‐OSCs, offering valuable insights designing fabrication strategies.

Language: Английский

19.7% efficiency binary organic solar cells achieved by selective core fluorination of nonfullerene electron acceptors DOI Creative Commons
Kerui Liu, Yuanyuan Jiang, Guangliu Ran

et al.

Joule, Journal Year: 2024, Volume and Issue: 8(3), P. 835 - 851

Published: Jan. 30, 2024

Language: Английский

Citations

149
Tunable Donor Aggregation Dominance in a Ternary Matrix of All‐Polymer Blends with Improved Efficiency and Stability DOI
Ruijie Ma, Hongxiang Li, Top Archie Dela Peña

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(15)

Published: July 7, 2023

Abstract Using two structurally similar polymer acceptors in constructing high‐efficiency ternary all‐polymer solar cells is a widely acknowledged strategy; however, the focus thus far has not been on how acceptor(s) would tune aggregation of donors, and furthermore film morphology device performance (efficiency stability). Herein, it reported that matching celebrity acceptor PY‐IT donor PBQx‐TCl results enhanced H ‐ PBQx‐TCl, which can be finely tuned by controlling amount second PY‐IV. Consequently, efficiency‐optimized PY‐IV weight ratio (0.2/1.2) leads to state‐of‐the‐art power conversion efficiency 18.81%, wherein light‐illuminated operational stability also along with well‐protected thermal stability. Such enhancements stabilities attributed optimization desired glass transition temperature target active layer based comprehensive characterization. In addition being high‐power case for cells, these are successful attempt using combined toward optimal morphology, provides theoretical basis construction other types organic photovoltaics beyond cells.

Language: Английский

Citations

61
1,5-Diiodocycloctane: a cyclane solvent additive that can extend the exciton diffusion length in thick film organic solar cells DOI

Fengbo Sun,

Xufan Zheng, Tianyu Hu

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(5), P. 1916 - 1930

Published: Jan. 1, 2024

The addition of cyclane 1,5-diiodocycloctane (DICO) provides critical roles in extending exciton diffusion length within active layer, consequently contributing to the improvement power conversion. efficiency thick film organic solar cells.

Language: Английский

Citations

55
Isomerized Green Solid Additive Engineering for Thermally Stable and Eco‐Friendly All‐Polymer Solar Cells with Approaching 19% Efficiency DOI Open Access
Bin Liu,

Wan Xu,

Ruijie Ma

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(49)

Published: Oct. 12, 2023

Laboratory-scale all-polymer solar cells (all-PSCs) have exhibited remarkable power conversion efficiencies (PCEs) exceeding 19%. However, the utilization of hazardous solvents and nonvolatile liquid additives poses challenges for eco-friendly commercialization, resulting in trade-off between device efficiency operation stability. Herein, an innovative approach based on isomerized solid additive engineering is proposed, employing volatile dithienothiophene (DTT) isomers to modulate intermolecular interactions facilitate molecular stacking within photoactive layers. Through elucidating underlying principles DTT-induced polymer assembly level, a PCE 18.72% achieved devices processed with environmentally benign solvents, ranking it among highest record values all-PSCs. Significantly, such superiorities DTT-isomerized strategy afford excellent compatibility large-area blade-coating techniques, offering promising pathway industrial-scale manufacturing Moreover, these demonstrate enhanced thermal stability extrapolated T80 lifetime 14 000 h, further bolstering their potential sustainable technological advancement.

Language: Английский

Citations

53
Solid Additive‐Assisted Selective Optimization Strategy for Sequential Deposited Active Layers to Construct 19.16% Efficiency Binary Organic Solar Cells DOI
Manjun Xiao,

Yongdie Meng,

Luting Tang

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(13)

Published: Dec. 21, 2023

Abstract Volatile solid (VS)‐additives are regarded as an effective tool to manipulate morphology of sequential deposited (SD) active layers for improving power conversion efficiencies (PCEs) organic solar cells (OSCs), while the independent effect VS‐additives on donor and acceptor is often overlooked. Herein, a new VS‐additive named 2‐(2‐methoxyphenyl)benzo[ b ]thiophene (BTO) synthesized applied in SD binary PM6/L8‐BO layers. Introducing it into bottom PM6 layer (PM6 + ), BTO has low volatility longer volatilization distance, which prolongs interaction time between L8‐BO /L8‐BO film, leading over‐aggregated L8‐BO. While inserting top (L8‐BO fast evaporation excellent dipole help enhance molecular absorption, crystallinity, ordered packing system. Therefore, optimized with proper phase separation achieved increase exciton dissociation charge transfer properties, restrain recombination energy loss OSCs, yielding impressive PCE over 19%. Furtherly, using D18 instead PM6, SD‐systems offer record‐high 19.16%. The developed selective optimization strategy provides deep insight working mechanism boosting OSCs.

Language: Английский

Citations

43
Cyano-functionalized pyrazine: an electron-deficient unit as a solid additive enables binary organic solar cells with 19.67% efficiency DOI

Lijun Tu,

Hao Wang,

Weixu Duan

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(10), P. 3365 - 3374

Published: Jan. 1, 2024

A strong electron-deficient unit CNPz as a solid additive was developed in PTQ10/ m -BTP-PhC6 binary organic solar cells. high PCE of 19.67% achieved with significant increase the J SC and FF (81.8%).

Language: Английский

Citations

37
Designing a Novel Wide Bandgap Small Molecule Guest for Enhanced Stability and Morphology Mediation in Ternary Organic Solar Cells with over 19.3% Efficiency DOI Creative Commons
Chenyang Zhang,

Xiuzun Zhong,

Xiaokang Sun

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(23)

Published: April 3, 2024

Abstract In this study, a novel wide‐bandgap small molecule guest material, ITOA, designed and synthesized for fabricating efficient ternary organic solar cells (OSCs) ITOA complements the absorbance of PM6:Y6 binary system, exhibiting strong crystallinity modest miscibility. optimizes morphology by promoting intensive molecular packing, reducing domain size, establishing preferred vertical phase distribution. These features contribute to improved well‐balanced charge transport, suppressed carrier recombination, exciton dissociation. Consequently, significantly enhanced efficiency 18.62% device is achieved, accompanied increased short‐circuit current density ( J SC ), fill factor (FF), open‐circuit voltage V OC ). Building on success, replacing Y6 with BTP‐eC9 leads an outstanding PCE 19.33% OSCs. Notably, introduction expedites formation optimized morphology, resulting in impressive 18.04% without any postprocessing. Moreover, exhibits operational stability under maximum power point (MPP) tracking. This comprehensive study demonstrates that rationally can optimize reduce energy loss, streamline fabrication process, essential achieving high OSCs, paving way practical commercial applications.

Language: Английский

Citations

35
Defining Solid Additive's Pivotal Role on Morphology Regulation in Organic Solar Cells Produced by Layer‐by‐layer Deposition DOI Creative Commons
Weiwei Wu, Yongmin Luo, Top Archie Dela Peña

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(22)

Published: March 8, 2024

Abstract Herein, two emerging device optimization methods, solid additive and layer‐by‐layer (LBL) process, for organic solar cells (OSCs) are simultaneously studied. Through traditional blend cast recently proposed identical solvent LBL cast, BDCB (2‐monobromo‐1,3‐dichloro‐bezene), a benzene derivative, is used to improve the performance based on celebrity combination PM6:L8‐BO. The results reveal that finely optimized concentration in PM6 solution can push efficiency of 19.03% compared with only 18.12% while power conversion (PCE) changing trend determined by BDCB's ratio L8‐BO's precursor. morphology characterizations confirm there exists no significant stratification LBL‐processed devices, supported previously reported swelling‐intercalation‐phase separation (SIPS) model. Thereby, additive's 2D considered smart strategy tuning SIPS which various final states. This work not reports cutting‐edge binary OSCs, but also new insight deep understanding method‐based development.

Language: Английский

Citations

32
Oligothiophene Additive‐Assisted Morphology Control and Recombination Suppression Enable High‐Performance Organic Solar Cells DOI
Wenting Liang, Lu Chen, Zhibo Wang

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(11)

Published: Jan. 9, 2024

Abstract Tuning the morphology through processing additives represents one of most promising strategies to boost performance organic solar cells (OSCs). However, it remains unclear how oligothiophene‐based solid influence molecular packing and OSCs. Here, two namely 2T 4T, are introduced into state‐of‐the‐art PM6:Y6‐based OSCs understand they film formation process, nanoscale morphology, photovoltaic performance. It is found that additive can improve both donor polymer non‐fullerene acceptor, resulting in lower Urbach energy reduced loss. Furthermore, blend with treatment displays enhanced domain purity a more favorable distribution acceptor materials vertical direction, which enhance charge extraction efficiency while simultaneously suppressing recombination. Consequently, processed realize 18.1% for devices. general applicability demonstrated, an impressive 18.6% PM6:L8‐BO‐based achieved. These findings highlight uncomplicated oligothiophenes have excellent potential fine‐adjustment active layer crucial future development

Language: Английский

Citations

30
Phase separation and domain crystallinity control enable open‐air‐printable highly efficient and sustainable organic photovoltaics DOI Creative Commons
Jie Lv, Xiaokang Sun, Hua Tang

et al.

InfoMat, Journal Year: 2024, Volume and Issue: 6(3)

Published: Jan. 31, 2024

Abstract Organic solar cells (OSCs) have emerged as a promising solution for sustainable energy production, offering advantages such low carbon footprint, short payback period, and compatibility with eco‐solvents. However, the use of hazardous solvents continues to dominate best‐performing OSCs, mainly because challenges controlling phase separation domain crystallinity in In this study, we combined solvent vapor treatment CS 2 thermal annealing precisely control PM6:M‐Cl PM6:O‐Cl systems processed eco‐solvent o‐xylene. This method resulted maximum power conversion efficiency (PCE) 18.4%, which is among highest values reported binary OSCs. Furthermore, fabrication techniques were transferred from spin coating nitrogen environment blade printing ambient air, retaining PCE 16.0%, showing its potential high‐throughput scalable production. addition, comparative analysis OSCs green was conducted reveal differences aggregation. work not only underscores significance sustainability but also lays groundwork unlocking full open‐air‐printable commercialization.

Language: Английский

Citations

17