Effect and Mechanism of Solvent Properties on Solution Behavior and Films Condensed State Structure for the Semi-rigid Conjugated Polymers

Zhang, Hao; Li, Tao; Liu, Bin; Ma, Tengning; Huang, Long; Bai, Zhang; Lu, Dan

doi:10.1007/s10118-021-2555-6

Cited by 6 publications

(6 citation statements)

References 49 publications

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“…to enhance the dynamic stability of the conjugated polymers solution is worthy of our deep exploration. Our studies have demonstrated the existence of cross-phase transfer of self-assembled ordered structures from the solution to the film; 39,42,43 we have confirmed that the ordered self-assembly structure formed in the precursor solution has intrinsic physical correlation with a highly ordered solid film under the action of the external field, which is of great significance for constructing the structure−function connection among the conjugated polymer solution, film condensed state structure, and photoelectronic devices and enhancing the carrier mobility and efficiency of photoelectronic devices fundamentally. Commonly used external fields include temperature field, solvent field, force field, external electric field, etc.…”

Section: Introductionmentioning

confidence: 70%

Study of the Dynamic Process of Enhancing the Stability of Conjugated Polymer Solutions and Films Induced by an External Electric Field

Zhang

Liu

2022

Macromolecules

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Taking the classic red light conjugated polymer MEH-PPV material as a representative, aiming at the common problem, that is, its degradation over time in the natural environment, which leads to unstability of the solution and film, a new idea and method based on the self-assembly of molecular chains in solution induced by an external electric field are proposed to manipulate the condensed-state structure of molecular chains in solution and enhance the dynamic stability of its solution. Then, the stability of the film was enhanced by transferring the condensed-state structure of the solution to the film in the dynamic evolution process from the solution to the film. First, the molecular mechanism of the unstability of the MEH-PPV precursor solution with time change was explored. Then, the self-built external electric field equipment was used for enhancing the dynamic stability of the conjugated polymer MEH-PPV solution and film by induction of an external electric field. Surprisingly, it was found that the precursor solutions with different concentrations all responded significantly to the induction of an external electric field during the 30 day storage period, forming large-scale, close-packed, chain-aggregated structures. More importantly, this structure can stably exist in the process of dynamic evolution with time change, thereby enhancing the stability of the solution. Through a series of studies on the films, it was found that the chain-aggregated structure formed in the solution could be stably transferred to the film in the process of dynamic transition from the solution to the film. Under the induction of the external electric field, a large-area, compact arrangement and ordered chain structures also appeared in the films, which not only enhanced the stability of the film but also revealed that there was an internal and intrinsic physical connection between the condensed-state structures of the solution and film in the dynamic evolution process. The study also revealed the molecular mechanism of the stability enhancement for the conjugated polymer MEH-PPV solution and film induced by the external electric field.

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Section: Introductionmentioning

confidence: 70%

Study of the Dynamic Process of Enhancing the Stability of Conjugated Polymer Solutions and Films Induced by an External Electric Field

Zhang

Liu

2022

Macromolecules

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“…Numerous studies have concentrated on manipulating chain conformation and pre-aggregate formation by employing a range of solvents or solvent mixtures. 15 These solvents possess diverse characteristics including solubility, toxicity, boiling point, viscosity, and polarity. 16,17 Newbloom et al investigated the gelation of poly(3-alkylthiophene)s (P3ATs) in a mixture of good and poor solvents.…”

Section: Introductionmentioning

confidence: 99%

Effect of solvent quality and sidechain architecture on conjugated polymer chain conformation in solution

Ma,

Li,

Fang

et al. 2024

Nanoscale

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“…10 These types of polymers possess natural long-chain characteristics, leading to a generally disordered structure when dissolved. During the film preparation, minor changes may occur in the structure of these solutions, [11][12][13] which can lead to consistency with the structure depicted in the film and a decrease in the transmission efficiency of optoelectronic devices. [14][15][16] Therefore, to improve the efficiency of the device by controlling the morphology of the thin film, adjusting the structure of the polymer solution's condensation state is a potentially effective approach.…”

Section: Introductionmentioning

confidence: 99%

Concentration effect on the chain structure and photoelectric properties of conjugated polymer precursor solutions and thin films: A mini review

Zhang,

Cheng,

et al. 2023

Journal of Polymer Science

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Conjugated polymers have attracted extensive attention in numerous research fields because of their exceptional photoelectric properties and distinctive solution processing capabilities. The conformation of the chain and the structure of the condensed state in solution are closely related to various factors, such as concentration and solvent. Concentration, as a significant external parameter, plays a crucial role in the self‐assembly and formation of crystalline structures in conjugated polymers. It also affects the properties of the solution, the structure of the membrane, and the performance of the fabricated devices. Recently, there have been an increasing number of studies conducted from the perspective of solution concentration. Therefore, it is important to comprehensively summarize the effect of concentration on the transition process of chain structure from solution to film, as well as the impact of concentration on the performance of related devices. In this review, we summarize the effects of concentration on the chain motion, particle size, ordered structure, and photoelectric properties of conjugated polymers in solutions and thin films, as well as on device efficiency. This provides a unique perspective on the fundamental characteristics of conjugated polymers, which can assist in the development and improvement of optoelectronic devices.

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Effect and Mechanism of Solvent Properties on Solution Behavior and Films Condensed State Structure for the Semi-rigid Conjugated Polymers

Cited by 6 publications

References 49 publications

Study of the Dynamic Process of Enhancing the Stability of Conjugated Polymer Solutions and Films Induced by an External Electric Field

Study of the Dynamic Process of Enhancing the Stability of Conjugated Polymer Solutions and Films Induced by an External Electric Field

Effect of solvent quality and sidechain architecture on conjugated polymer chain conformation in solution

Concentration effect on the chain structure and photoelectric properties of conjugated polymer precursor solutions and thin films: A mini review

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