Controlling morphology and microstructure of conjugated polymers via solution-state aggregation

Yao, Ze‐Fan; Wang, Jie‐Yu; Pei, Jian

doi:10.1016/j.progpolymsci.2022.101626

Cited by 48 publications

(44 citation statements)

References 192 publications

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“…The state of the polymer in solution has a decisive influence on chain conformation, packing, and charge transfer in the solid state. This idea is the basis of the strategy of “control of the supramolecular structure in the solution state” to control the electrophysical and optical properties of thin films [ 28 , 29 ]. In this case, the strength of the polymer–solvent interaction can be controlled by changing the concentration of the polymer in the solution or the temperature of the solution [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Non-Conjugated Copoly(Arylene Ether Ketone) for the Current-Collecting System of a Solar Cell with Indium Tin Oxide Electrode

et al. 2023

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The mechanism of charge carrier transport in the indium tin oxide (ITO)/polymer/Cu structure is studied, where thin films of copoly(arylene ether ketone) with cardo fluorene moieties are used. This copoly(arylene ether ketone) is non-conjugated polymer which has the properties of electronic switching from the insulating to the highly conductive state. The dependence on the polymer film thickness of such parameters as the potential barrier at the ITO/polymer interface, the concentration of charge carriers, and their mobility in the polymer is studied for the first time. The study of this system is of interest due to the proven potential of using the synthesized polymer in the contact system of a silicon solar cell with an ITO top layer. The parameters of charge carriers and ITO/polymer barrier are evaluated based on the analysis of current–voltage characteristics of ITO/polymer/Cu structure within the injection current models and the Schottky model. The thickness of the polymer layer varies from 50 nm to 2.1 µm. The concentration of intrinsic charge carriers increases when decreasing the polymer film thickness. The charge carrier mobility depends irregularly on the thickness, showing a maximum of 9.3 × 10−4 cm2/V s at 210 nm and a minimum of 4.7 × 10−11 cm2/V s at 50 nm. The conductivity of polymer films first increases with a decrease in thickness from 2.1 µm to 210 nm, but then begins to decrease upon transition to the globular structure of the films at smaller thicknesses. The dependence of the barrier height on polymer thickness has a minimum of 0.28 eV for films 100–210 nm thick. The influence of the supramolecular structure and surface charge field of thin polymer films on the transport of charge carriers is discussed.

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Section: Resultsmentioning

confidence: 99%

Non-Conjugated Copoly(Arylene Ether Ketone) for the Current-Collecting System of a Solar Cell with Indium Tin Oxide Electrode

et al. 2023

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“…Moreover, the aggregation state of the materials, such as an amorphous state, a semi-crystalline state and a single crystal state, plays an important role in the fabrication of final high-performance or multi-functional devices. [394][395][396][397] To obtain efficient charge transport properties, materials are always designed and assembled with highly ordered stacking structures and low defect density. In particular, organic semiconductor single crystals with long range order have always been considered as the best platforms to achieve high carrier transport performance, irrespective of whether they are n-type, ambipolar or p-type organic semiconductors.…”

Section: Discussionmentioning

confidence: 99%

Recent advances in n-type and ambipolar organic semiconductors and their multi-functional applications

et al. 2023

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“…It is always different and elusive. To better study these issues, we first introduce the concept of multilevel microstructures of conjugated polymers, as well as their effects on the related optoelectronic properties and device performance. , The multilevel microstructures of conjugated polymers containing multiple spatial scales ranging from Å∼nm at the molecular level to nm∼mm at the crystalline domain and device size level. − The related characterization techniques suited are also summarized. Based on the structural features at different spatial scales of conjugated polymers, Pei divided the multilevel microstructures of conjugated polymers into quaternary structures like proteins, as shown in Figure .…”

Section: Charge Transport Through Multilevel Microstructuresmentioning

confidence: 99%

Polymer Semiconductors: Synthesis, Processing, and Applications

Ding

Yao

et al. 2023

Chem. Rev.

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Polymer semiconductors composed of a carbon-based π conjugated backbone have been studied for several decades as active layers of multifarious organic electronic devices. They combine the advantages of the electrical conductivity of metals and semiconductors and the mechanical behavior of plastics, which are going to become one of the futures of modulable electronic materials. The performance of conjugated materials depends both on their chemical structures and the multilevel microstructures in solid states. Despite the great efforts that have been made, they are still far from producing a clear picture among intrinsic molecular structures, microstructures, and device performances. This review summarizes the development of polymer semiconductors in recent decades from the aspects of material design and the related synthetic strategies, multilevel microstructures, processing technologies, and functional applications. The multilevel microstructures of polymer semiconductors are especially emphasized, which plays a decisive role in determining the device performance. The discussion shows the panorama of polymer semiconductors research and sets up a bridge across chemical structures, microstructures, and finally devices performances. Finally, this review discusses the grand challenges and future opportunities for the research and development of polymer semiconductors.

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Controlling morphology and microstructure of conjugated polymers via solution-state aggregation

Cited by 48 publications

References 192 publications

Non-Conjugated Copoly(Arylene Ether Ketone) for the Current-Collecting System of a Solar Cell with Indium Tin Oxide Electrode

Non-Conjugated Copoly(Arylene Ether Ketone) for the Current-Collecting System of a Solar Cell with Indium Tin Oxide Electrode

Recent advances in n-type and ambipolar organic semiconductors and their multi-functional applications

Polymer Semiconductors: Synthesis, Processing, and Applications

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