High-efficiency organic solar cells processed from a real green solvent

Pang, Shuting; Chen, Zhili; Li, Junyu; Chen, Yuting; Liu, Zhitian; Wu, Hongbin; Duan, Chunhui; Huang, Fei; Cao, Yong

doi:10.1039/d2mh01314b

Cited by 42 publications

(31 citation statements)

References 66 publications

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“…[25,26] As shown in Figure 1 (red region), typically, these solvents, particularly non-halogen solvents, cannot afford PCEs as high as CF. [27] Most of the time, the eco-friendlier hydrocarbon solvents lead to PCEs significantly lower than CF, because the physical chemistry among donor-acceptor-solvent, for example, their phase diagram and the drying kinetics of the solution, are essentially different from fast-drying solvents such as CF. [28] Therefore, the conventional way of fabricating the active layer by blend-casting the co-dissolved donor and acceptor solution in one step, may not be able to achieve similar morphology when high boiling point solvents are used.…”

Section: Introductionmentioning

confidence: 99%

18.1% Ternary All‐Polymer Solar Cells Sequentially Processed from Hydrocarbon Solvent with Enhanced Stability

Zhao

Hou

et al. 2023

Advanced Energy Materials

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All‐polymer solar cells (all‐PSCs) have promising potential for industrial production due to their superior stability. Recently, the widespread application of the polymerized small molecule acceptor (PSMA) has led to a surge in the efficiency of all‐PSCs. However, the high efficiencies of these devices generally rely on the use of the highly volatile solvent, chloroform (CF). Furthermore, the molecular weights of PSMA are lower than polymer donors, yet their crystallinity is weaker than typical small molecules, making most PSMA‐based all‐PSCs suffer from low electron mobility. To improve device performance and facilitate large scale production of all‐PSCs, it is necessary to enhance electron mobility and avoid the use of CF. This paper investigates the use of sequential processing (SqP) for active layer preparation using toluene as the solvent to address these issues. This work reports 18.1% efficient all‐PSC devices, which is the highest efficiency of all‐PSCs prepared using non‐halogen solvents. This work systematically compares the conventional blend‐casting method with the SqP method using PM6 as the donor and PY‐V‐γ and PJ1‐γ as the acceptors, and compares the performance of binary and ternary blends in both methods. Finally, this work measures the device stability and finds that SqP can significantly improve the photostability of the device.

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Section: Introductionmentioning

confidence: 99%

18.1% Ternary All‐Polymer Solar Cells Sequentially Processed from Hydrocarbon Solvent with Enhanced Stability

Zhao

Hou

et al. 2023

Advanced Energy Materials

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“…In the field of organic photovoltaics (OPVs) and organic fieldeffect transistors (OFETs), nonhalogenated solvents, such as 2methyltetrahydrofuran (2-mTHF), p-xylene, and 2-methylanisole (o-MA), have been employed in the deposition of active thin-films based on polymer semiconductors. [26][27][28][29] However, research on the ecofriendly solvent-processed polymer light-emitting diodes (PLEDs) has been rarely reported due to the limited solubility of LCPs resulted by rigid aromatic backbone and complex intermolecular interactions, [30] especially for the blue PLEDs, [31] where achieving high-efficient and stable electroluminescence (EL) remain huge challenges. [32][33][34] On the other hand, although the classification and ranking of green solvents varies slightly from organization to organization, they all make qualitative assessment according to the criteria: low health hazard, high safety, and small environmental impact.…”

Section: Introductionmentioning

confidence: 99%

Large‐Area Printed Display Based on Green Solvent Processable Blue Light‐Emitting Conjugated Polymer

Bai

Zhang

Han

et al. 2023

Adv Materials Technologies

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Green‐processable printed large‐area light‐emitting diode (LED) is the crucial component of the high quality solid lighting and flat‐panel display. Accelerating the replacement from fossil‐based solvents to sustainable ecofriendly solvent is desirable for solution‐based printed organic electronics. Herein, by simple introducing methyl to the benzene groups of polydiarylfluorene‐based polymer, this work realizes the solution processing of blue polymer light‐emitting diodes (PLEDs) with a bio‐based solvent of limonene toward large‐area printed display. Film processed from this solvent exhibits satisfactory morphology and remarkable photophysical performances, even though the polymer chains show more serious aggregation in solution. What's more, devices fabricated with spin‐coated films present higher external quantum efficiency (EQE) and better spectra repeatability. Encouraged by the good film‐forming ability of this polymer in limonene, this work realizes the fabrication of printed large‐area films (5 × 5 cm2) with uniform emission and surface morphology by blade coating. Furthermore, this work develops passive matrix (PM) PLEDs arrays with 20 × 20 pixels that can dynamically display monochrome letters and numbers, demonstrating the potential application of cost‐effective printing techniques in large‐area display.

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“…For example, Cao et al reported a B→N based conjugated polymer called PBNT-TzTz as a donor, which can be dissolved in the food-grade solvent anisole to make OSCs (Figure 5). [48] The good solubility of this B→N conjugated polymer is due to the large dipole moment originating from B→N units, resulting in Reproduced with permission. [44] Copyright 2021, Springer Nature Publishing Group.…”

Section: Huang Et Al Introduced a New Non-fullerene Acceptor Dty6mentioning

confidence: 99%

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confidence: 99%

Green‐Processed Non‐Fullerene Organic Solar Cells Based on Y‐Series Acceptors

Liu

Duan

et al. 2023

Advanced Science

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The development of environmentally friendly and sustainable processes for the production of high‐performance organic solar cells (OSCs) has become a critical research area. Currently, Y‐series electron acceptors are widely used in high‐performance OSCs, achieving power conversion efficiencies above 19%. However, these acceptors have large fused conjugated backbones that are well‐soluble in halogenated solvents, such as chloroform and chlorobenzene, but have poor solubility in non‐halogenated green solvents. To overcome this challenge, recent studies have focused on developing green‐processed OSCs that use non‐chlorinated and non‐aromatic solvents to dissolve bulk‐heterojunction photoactive layers based on Y‐series electron acceptors, enabling environmentally friendly fabrication. In this comprehensive review, an overview of recent progress in green‐processed OSCs based on Y‐series acceptors is provided, covering the determination of Hansen solubility parameters, the use of non‐chlorinated solvents, and the dispersion of conjugated nanoparticles in water/alcohol. It is hoped that the timely review will inspire researchers to develop new ideas and approaches in this important field, ultimately leading to the practical application of OSCs.

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High-efficiency organic solar cells processed from a real green solvent

Abstract: The fabrication of organic solar cells (OSCs) depends heavily on highly toxic chlorinated solvents, which are incompatible with industrial manufacturing. The reported alternative solvents such as non-halogenated aromatic hydrocarbons and...

Cited by 42 publications

References 66 publications

18.1% Ternary All‐Polymer Solar Cells Sequentially Processed from Hydrocarbon Solvent with Enhanced Stability

18.1% Ternary All‐Polymer Solar Cells Sequentially Processed from Hydrocarbon Solvent with Enhanced Stability

Large‐Area Printed Display Based on Green Solvent Processable Blue Light‐Emitting Conjugated Polymer

Green‐Processed Non‐Fullerene Organic Solar Cells Based on Y‐Series Acceptors

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