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

Organic Solar Cells with Over 19% Efficiency Enabled by a 2D‐Conjugated Non‐Fullerene Acceptor Featuring Favorable Electronic and Aggregation Structures DOI
Kerui Liu, Yuanyuan Jiang, Feng Liu

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(32)

Published: May 27, 2023

The π-expansion of non-fullerene acceptors is a promising method for boosting the organic photovoltaic performance by allowing fine-tuning electronic structures and molecular packing. In this work, highly efficient solar cells (OSCs) are fabricated using 2D strategy to design new acceptors. Compared with quinoxaline-fused cores AQx-16, π-expanded phenazine-fused AQx-18 induce more ordered compact packing between adjacent molecules, affording an optimized morphology rational phase separation in blend film. This facilitates exciton dissociation inhibited charge recombination. Consequently, power conversion efficiency (PCE) 18.2% simultaneously increasing Voc , Jsc fill factor achieved AQx-18-based binary OSCs. Significantly, ternary devices via two-in-one alloy acceptor exhibit superior PCE 19.1%, one highest values ever reported OSCs, along high 0.928 V. These results indicate importance delicate regulation crystalline behaviors achieve performance, aimed at significantly promoting further development

Language: Английский

Citations

149
Donor–acceptor mutually diluted heterojunctions for layer-by-layer fabrication of high-performance organic solar cells DOI
Liang Wang, Chen Chen,

Yiwei Fu

et al.

Nature Energy, Journal Year: 2024, Volume and Issue: 9(2), P. 208 - 218

Published: Jan. 9, 2024

Language: Английский

Citations

139
In Situ Removable Additive Assisted Organic Solar Cells Achieving Efficiency over 19% and Fill Factor Exceeding 81% DOI

Lingchen Kong,

Zesheng Zhang, Ningjiu Zhao

et al.

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(25)

Published: May 24, 2023

Abstract Additive engineering can precisely regulate the bulk‐heterojunction active layer morphology with ideal domain size and purity, playing a critical role in development of organic solar cells (OSCs). Herein, two solid additives, 1,4‐dichlorobenzene (DCB) 1‐chloro‐4‐iodobenzene (CIB), low melting point (mp.) ≈52 °C, are investigated comprehensively comparison to 1,4‐diiodobenzene (DIB, mp. 131 °C). After spin‐coating, DIB residue is found as‐cast PM6:BTP‐eC9 based blend film, whereas DCB CIB completely removed during showing situ removable properties that enable convenient processing. In OSCs, DCB‐ CIB‐processed layers afford power‐conversion efficiencies (PCEs) 18.2% 18.4%, respectively, all higher than 17.8% for DIB. Among three most effective enhancements absorption coefficients donor acceptor, affording fast more balanced carrier transports, suppressing recombination. Of particular note, provide some universality as an additive, on its elevations PCEs several binary PM6:D18‐Cl:L8‐BO ternary layers. Impressively, prominent PCE 19.1% remarkable fill factor 81.1% achieved layer. This work demonstrates potential additive high‐efficiency OSCs.

Language: Английский

Citations

104
Electrostatic force promoted intermolecular stacking of polymer donors toward 19.4% efficiency binary organic solar cells DOI Creative Commons

Zirui Gan,

Liang Wang,

Jinlong Cai

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Oct. 9, 2023

Conjugated polymers are generally featured with low structural order due to their aromatic and irregular units, which limits light absorption charge mobility in organic solar cells. In this work, we report a conjugated molecule INMB-F that can act as molecular bridge via electrostatic force enhance the intermolecular stacking of BDT-based polymer donors toward efficient stable Molecular dynamics simulations synchrotron X-ray measurements reveal electronegative adsorb on electropositive main chain increase donor-donor interactions, leading enhanced shortened π-π distance consequently transport ability. Casting non-fullerene acceptor layer top modified donor fabricate cells layer-by-layer deposition evidences significant power conversion efficiency boosts range photovoltaic systems. A 19.4% (certified 18.96%) is realized PM6/L8-BO binary devices, one highest reported efficiencies material system. The by also leads six-fold enhancement operational stability

Language: Английский

Citations

101
Controlling Morphology and Voltage Loss with Ternary Strategy Triggers Efficient All-Small-Molecule Organic Solar Cells DOI

Mengyun Jiang,

Hong‐Fu Zhi,

Bao Zhang

et al.

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(2), P. 1058 - 1067

Published: Jan. 23, 2023

Herein, an emerging acceptor L8-BO as the third component was combined with B1:BO-4Cl system for constructing efficient ternary all-small-molecule organic solar cells (ASM-OSCs). Theoretical, morphological, and crystallographic studies reveal that BO-4Cl possess good compatibility, resulting in alloy-like state formation of two acceptors blends. The synergistic effect is conducive to forming favorable phase separation molecular stacking promoting charge splitting extraction, which contributes simultaneously boosting short-circuit current density fill factor. Furthermore, higher lowest unoccupied orbital energy level assist ASM-OSCs achieving lower voltage loss respect binary devices. optimal 20 wt % deliver a top-level efficiency 17.10%. This work demonstrates not only morphology but also small matrix can be well-manipulated by employing strategy.

Language: Английский

Citations

97
Geometry design of tethered small-molecule acceptor enables highly stable and efficient polymer solar cells DOI Creative Commons
Yang Bai, Ze Zhang, Qiuju Zhou

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 22, 2023

With the power conversion efficiency of binary polymer solar cells dramatically improved, thermal stability small-molecule acceptors raised main concerns on device operating stability. Here, to address this issue, thiophene-dicarboxylate spacer tethered are designed, and their molecular geometries further regulated via thiophene-core isomerism engineering, affording dimeric TDY-α with a 2, 5-substitution TDY-β 3, 4-substitution core. It shows that processes higher glass transition temperature, better crystallinity relative its individual acceptor segment isomeric counterpart TDY-β, more stable morphology donor. As result, based delivers 18.1%, most important, achieves an extrapolated lifetime about 35000 hours retaining 80% initial efficiency. Our result suggests proper geometry design, can achieve both high

Language: Английский

Citations

97
Non-covalent interactions (NCIs) in π-conjugated functional materials: advances and perspectives DOI Creative Commons
Ashanul Haque, Khalaf M. Alenezi, Muhammad S. Khan

et al.

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(2), P. 454 - 472

Published: Jan. 1, 2023

We describe the role of non-covalent intermolecular interactions in design π-conjugated functional materials. highlight opto-electronic applications these materials related to their structural and photophysical properties.

Language: Английский

Citations

92
Restrained energetic disorder for high-efficiency organic solar cells via a solid additive DOI

Zhihao Chen,

Huifeng Yao, Jingwen Wang

et al.

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(6), P. 2637 - 2645

Published: Jan. 1, 2023

A new morphology regulation approach using solid additive, 1,3,5-trimethoxybenzene, can restrict energetic disorder and optimize the nanoscale of organic solar cells, achieves a high power conversion efficiency 19.30%.

Language: Английский

Citations

92
Improved Molecular Ordering in a Ternary Blend Enables All‐Polymer Solar Cells over 18% Efficiency DOI Open Access

Yunhao Cai,

Cong Xie, Qian Li

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(8)

Published: Dec. 3, 2022

Although all-polymer solar cells (all-PSCs) show great commercialization prospects, their power conversion efficiencies (PCEs) still fall behind small molecule acceptor-based counterparts. In blends, the optimized morphology and high molecular ordering are difficult to achieve since there is troublesome competition between crystallinity of polymer donor acceptor during film-formation process. Therefore, it challenging improve performance all-PSCs. Herein, a ternary strategy adopted modulate an blend, in which PM6:PY-82 selected as host blend PY-DT employed guest component. Benefiting from favorable miscibility two acceptors higher regularity PY-DT, matrix features well-defined fibrillar improved ordering. Consequently, champion PM6:PY-82:PY-DT device produces record-high PCE 18.03%, with simultaneously open-circuit voltage, short-circuit current fill factor comparison binary devices. High-performance large-area (1 cm2 ) thick-film (300 nm) all-PSCs also successfully fabricated PCEs 16.35% 15.70%, respectively.Moreover, 16.5 organic module affords encouraging 13.84% when using non-halogenated solvent , showing potential "Lab-to-Fab" transition

Language: Английский

Citations

80
Film-formation dynamics coordinated by intermediate state engineering enables efficient thickness-insensitive organic solar cells DOI
Xin Song, Hao Xu, Xinyu Jiang

et al.

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(8), P. 3441 - 3452

Published: Jan. 1, 2023

In this work, by adding a low-cost and volatile 1,3,5-tribromobenzene solid as process-aid additive, champion power conversion efficiency high 19.1% together with remarkable fill factor of 80.7% is achieved based on the state-of-the-art PM6:L8-BO system.

Language: Английский

Citations

75