Enhancing the Electrostatic Potential To Develop High-Performance Polymer Donors via a Ternary Copolymerization Strategy DOI

Xintong Shi,

Jiawei Huang,

Xiaoping Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Ternary copolymerization has been proven to be an effective method regulate the photovoltaic properties of polymer donors. However, terpolymers synthesized using ternary strategy inevitably disrupt periodic sequence distribution backbone, resulting in increased molecular disorder and heightened main-chain entropy. Herein, we developed two terpolymer donors by introducing electron-deficient fused-ring skeleton unit BTP with a large dipole moment into main chain PM6 via copolymerization. We found that presence enables exhibit enhanced crystallinity electrostatic potential, leading excellent miscibility more ordered packing than PM6. As result, maximum PCE 19.40% was achieved for PY5:L8-BO-based device. Overall, this work introduces novel approach developing high-performance combining third component moments restrain enhance intermolecular interaction force between acceptors.

Language: Английский

Isomerization Engineering of Solid Additives Enables Highly Efficient Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Active Layer DOI
Yawei Miao, Yanna Sun,

Wentao Zou

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 20, 2024

Morphology control is crucial in achieving high-performance organic solar cells (OSCs) and remains a major challenge the field of OSC. Solid additive an effective strategy to fine-tune morphology, however, mechanism underlying isomeric solid additives on blend morphology OSC performance still vague urgently requires further investigation. Herein, two based pyridazine or pyrimidine as core units, M1 M2, are designed synthesized explore working OSCs. The smaller steric hindrance larger dipole moment facilitate better π-π stacking aggregation M1-based active layer. M1-treated all-small-molecule OSCs (ASM OSCs) obtain impressive efficiency 17.57%, ranking among highest values for binary ASM OSCs, with 16.70% M2-treated counterparts. Moreover, it imperative investigate whether isomerization engineering works state-of-the-art polymer D18-Cl:PM6:L8-BO-based devices achieve exceptional 19.70% (certified 19.34%), work provides deep insights into design clarifies potential optimizing device through additives.

Language: Английский

Citations

31
High-Efficiency Ternary Polymer Solar Cells with a Gradient-Blended Structure Fabricated by Sequential Deposition DOI
Jianghao Jin, Qiao Wang, Wenfei Shen

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(12), P. 15121 - 15132

Published: March 19, 2024

Acquiring the ideal blend morphology of active layer to optimize charge separation and collection is a constant goal polymer solar cells (PSCs). In this paper, ternary strategy sequential deposition process were combined make sufficient use spectrum, energy-level structure, regulate vertical phase morphology, ultimately enhance power conversion efficiency (PCE) stability PSCs. Specifically, donor acceptor illustrated gradient-blended distribution in deposition-processed films, thus resulting facilitated carrier characteristics devices. Consequently, PSCs based on D18-Cl/Y6:ZY-4Cl have achieved device over 18% with synergetic improvement open-circuit voltage (VOC), short-circuit current density (JSC), fill factor (FF). Therefore, work reveals facile approach fabricating improved performance stability.

Language: Английский

Citations

19
Extending Exciton Diffusion Length via an Organic‐Metal Platinum Complex Additive for High‐Performance Thick‐Film Organic Solar Cells DOI Open Access

Wentao Zou,

Yanna Sun, Lei Sun

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

The long exciton diffusion length (LD) plays an important role in promoting dissociation, suppressing charge recombination, and improving the transport process, thereby performance of organic solar cells (OSCs), especially thick-film OSCs. However, limited LD hinders further improvement device as film thickness increases. Here, organic-metal platinum complex, namely TTz-Pt, is synthesized served a solid additive into D18-Cl:L8-BO system. addition TTz-Pt enhanced crystallinity blends, reduced energy disorder, trap density, decreased non-radiative recombination binding energy, which conducive to prolonging TTz-Pt-treated film, facilitating dissociation process along with inhibiting recombination. Consequently, D18:L8-BO:IDIC (100 nm) exhibits champion power conversion efficiency (PCE) 20.12% (certified 19.54%), one highest PCEs reported for OSCs date. Remarkably, record-breaking PCE 18.84% yielded active layer 300 nm. Furthermore, superior universality This work provides simple universal approach extending by introducing complex achieve highly efficient

Language: Английский

Citations

2
Establishing Co‐Continuous Network of Conjugated Polymers and Elastomers for High‐Performance Polymer Solar Cells with Extreme Stretchability DOI Creative Commons
Jin‐Woo Lee, Trieu Hoang‐Quan Nguyen, Eun Sung Oh

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(26)

Published: May 13, 2024

Abstract High power conversion efficiency (PCE) and mechanical robustness are prerequisites for wearable applications of organic solar cells (OSCs). However, stretchability present active systems (i.e., crack‐onset strain (COS) < 30%) should be improved. While introducing elastomers into is considered a simple method improving stretchability, the inclusion typically results in decrease PCE OSC with limited enhancement due to lack interconnected electrical pathways. In this study, it developed efficient intrinsically stretchable (IS)‐OSCs exceptional robustness, by constructing co‐continuous networks conjugated polymers (D18) (SEBS) within layers. It demonstrated that blend film specific ratio (40:60 w/w) D18:SEBS crucial forming structures, establishing well‐connected channels. Consequently, D18 0.4 :SEBS 0.6 /L8‐BO OSCs achieve 16‐times higher (COS = 126%) than based on D18/L8‐BO 8%), while achieving 4‐times (12.13%) compared SEBS‐rich layers (D18 0.2 0.8 /L8‐BO, 3.15%). Furthermore, ‐based IS‐OSCs preserve 86 90% original PCEs at 50% after 200 stretching/releasing cycles 15% strain, respectively, demonstrating highest among reported IS‐OSCs.

Language: Английский

Citations

15
Binary Organic Solar Cells with Exceeding 19% Efficiency via the Synergy of Polyfluoride Polymer and Fluorous Solvent DOI
Zhilong He, Siyuan Li, Rui Zeng

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(30)

Published: May 11, 2024

Rational molecular design and suitable device engineering are two important strategies to boost the efficiencies in organic solar cells (OSCs). Yet these approaches independently developed, while their synergy is believed be more productive. Herein, a branched polyfluoride moiety, heptafluoroisopropoxyl group, introduced into side chains of conjugated polymers for first time. Compared with conventional alkyl chain, this chain can endow resulting polymer namely PF7 highly packing order strong crystallinity owing polarization fluorine-induced interactions, good solubility moderate miscibility retained. As result, comprehensively outperforms state-of-the-art PM6 photovoltaic properties. More importantly, based on groups fluorous solvents, new post-treatment denoted as solvent vapor annealing (FSVA) proposed match PF7. Differing from existing post-treatments, FSVA selectively reorganize fluoropolymer molecules but less impact small blend films. By employing solvent, achieves remarkable efficiency 19.09%, which among best binary OSCs. The treatment exhibit excellent universality various OSCs different material combinations or architectures.

Language: Английский

Citations

14
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
Cost-effective polymer donors based on pyridine for efficient nonfullerene polymer solar cells DOI
Chuantao Gu, Yu Zhao, Kang Xiao

et al.

Polymer, Journal Year: 2024, Volume and Issue: 299, P. 126926 - 126926

Published: March 23, 2024

Language: Английский

Citations

11
Multi‐Selenophene Strategy Enables Dimeric Acceptors‐Based Organic Solar Cells with over 18.5% Efficiency DOI
Yuyang Bai, Tianqi Chen, Xinyi Ji

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(30)

Published: May 9, 2024

Abstract Dimeric acceptor (DMA) becomes a promising alternative to small‐molecular and polymeric acceptor‐based organic solar cells (OSCs) due its well‐defined chemical structure, high batch‐to‐batch reproducibility, low molecular diffusion properties. However, DMAs usually exhibit blueshifted absorptions, limiting their photon utilization abilities. Herein, multi‐selenophene strategies are adopted develop redshifted DMAs. From monomer (YSe) dimers (DYSe‐1 DYSe‐2), reduced electron reorganization energies exciton binding enable the efficient charge dynamics in DMAs‐based OSCs. Together with effective absorption extending ≈920 nm, DYSe‐1‐ DYSe‐2‐ based OSCs outstanding short‐circuit current densities ( J SC s) over 27 mA cm −2 , which best among Besides, compared YSe‐based device, both DMA‐based devices have higher electroluminescence quantum efficiencies thus reduce nonradiative recombination loss (ΔE 3 ), contributing energy losses. The resultant open‐circuit voltages V OC of ≈0.88 V, which, combining super values, lead power conversion 18.56% 18.22%, respectively. These results highlight great potential strategy for development performance.

Language: Английский

Citations

11
Tackling Energy Loss in Organic Solar Cells via Volatile Solid Additive Strategy DOI
Huimin Xiang,

Fengbo Sun,

Xufan Zheng

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(25)

Published: April 18, 2024

Abstract The energy loss induced open‐circuit voltage ( V OC ) deficit hampers the rapid development of state‐of‐the‐art organic solar cells (OSCs), therefore, it is extremely urgent to explore effective strategies address this issue. Herein, a new volatile solid additive 1,4‐bis(iodomethyl)cyclohexane (DIMCH) featured with concentrated electrostatic potential distribution utilized act as morphology‐directing guest reduce in multiple state‐of‐art blend system, leading one highest efficiency (18.8%) at forefront reported binary OSCs. Volatile DIMCH decreases radiative/non‐radiative recombination (Δ E 2 /Δ 3 by rationally balancing crystallinity donors and acceptors realizing homogeneous network structure crystal domain reduced D–A phase separation during film formation process weakens disorder trap density It believed that study brings not only profound understanding emerging additives but also hope further improve performance

Language: Английский

Citations

10
19.36% Efficiency Organic Solar Cells Based on Low‐Cost Terpolymer Donors with Simple Molecular Structures DOI
Xin Wu, Xixi Zhang, J.B. Zhang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: May 19, 2024

Abstract Low cost and high performance are key elements for the industrialization of organic solar cells (OSCs). In view this, developing highly‐efficient photovoltaic molecules with simple chemical structure is one most effective countermeasures. Herein, three simple‐structure terpolymers PTQ12‐5, PTQ12‐10, PTQ12‐15 designed synthesized, by embedding difluoro‐substituted bithiophene (2T‐2F) unit into backbone low‐cost high‐efficiency polymer PTQ10. The synthesis contains only two‐step synthetic routes over 85% yields from cheap raw compounds, thus exhibiting distinctly characteristic. Remarkably, PTQ12‐5 shows significantly higher absorbance coefficient hole mobility than Consequently, PTQ12‐5‐based OSCs more efficient exciton dissociation charge transfer, suppressed carrier recombination, tighter molecular π‐π stacking, faster balanced transport, demonstrates a improved efficiency 18.77% that PTQ10‐based device (18.03%). Moreover, an outstanding 19.36% achieved in ternary further modulating energy level alignment blending features photoactive molecules, which highest based on polymers to date. This work has significant implications guiding design high‐performance materials.

Language: Английский

Citations

10