Systematic investigation of self-organization behavior in supramolecular π-conjugated polymer for multi-color electroluminescence

Lin, Jinyi; Liu, Bin; Yu, Mengna; Wang, Xu-Hua; Bai, Lubing; Han, Yamin; Ou, Changjin; Xie, Linghai; Liu, Feng; Zhu, Wen-Sai; Zhang, Xinwen; Ling, Haifeng; Stavrinou, Paul N.; Wang, Jianpu; Bradley, Donal D. C.; Huang, Wei

doi:10.1039/c7tc04833e

Cited by 25 publications

(22 citation statements)

References 56 publications

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“…As self‐organization processes play a key role in the efficient production of highly ordered functional systems, they have been massively explored concerning the organic, inorganic, and organic–inorganic hybrid entities with molecular‐ and mesoscale periodicities . Among these, the self‐organizations of inorganics in polymers are of particular interest, which could lead to the construction of previously unknown functional materials with elaborate hybridized structures .…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanolights in Piezopolymers are Self‐Organizing Toward Color Tunable Luminous Hybrids for Kinetic Energy Harvesting

Wang

Huang

et al. 2020

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Herein, an all‐solid‐state sequential self‐organization and self‐assembly process is reported for the in situ construction of a color tunable luminous inorganic/polymer hybrid with high direct piezoresponse. The primary inorganic self‐organization in solid polymer and the subsequent polymer self‐assembly are achieved at high pressure with the first utilization of piezo‐copolymer (PVDF‐TrFE) as the host matrix of guest carbon quantum dots (CQDs). This process induces the spontaneous formation of a highly ordered, microscale, polygonal, and hierarchically structured CQDs/PVDF‐TrFE hybrid with multicolor photoluminescence, consisting of very thermodynamic stable polar crystalline nanowire arrays. The electrical polarization‐free CQDs/PVDF‐TrFE hybrids can efficiently harvest the environmental available kinetic mechanical energy with a new large‐scale group‐cooperation mechanism. The open‐circuit voltage and short‐circuit current outputs reach up to 29.6 V cm−2 and 550 nA cm−2, respectively. The CQDs/PVDF‐TrFE–based hybrid nanogenerator demonstrates drastically improved durable and reliable features during the real‐time demonstration of powering commercial light emitting diodes. No attenuation/fluctuation of the electrical signals is observed for ≈10 000 continuous working cycles. This study may offer a new design concept for progressively but spontaneously constructing novel multiple self‐adaptive complex inorganic/polymer hybrids that promise applications in the next generation of self‐powered autonomous optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Carbon Nanolights in Piezopolymers are Self‐Organizing Toward Color Tunable Luminous Hybrids for Kinetic Energy Harvesting

Wang

Huang

et al. 2020

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“…However, the R h was obviously increased to 89.0 nm with THF increased to 20%, while the R h was further increased up to 99.0 nm in 100% THF solvent (Figure b). From the correlation curve of dynamic light scattering (Figure a), it could be seen that when THF ratio increased gradually in the solution, PPFOH chains relaxation behavior slowed obviously, it indicated chain aggregation size became bigger gradually with THF ratio increase until cross-links or clusters structure was formed in a large-scale aggregation . From Figure b, it could be found that chain aggregate size presented rapid increase at first with THF ratio increase to 20%, and then increased slowly.…”

Section: Results and Discussionmentioning

confidence: 92%

“…This indicates that solvents in the PPFOH solution had less effect on condense state structure of the film after film-forming by spin coating. Reason was that the solvents could be volatilized in the process of solution to film due to low boiling point of CF 61 °C and THF 66 °C, strong intermolecular interaction between PPFOH molecules were formed in the process . But, in film from CF solvent, intermolecular interaction between PPFOH molecules was the strongest because of its lower boiling point than that of THF.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The chemical structure of the PPFOH is shown in Figure . There is a hydroxyl group at the 9-position on PPFOH, here, intermolecular hydrogen bond can be formed. − Therefore, the solvents can also be divided into two types based on whether there are hydrogen bonds interaction between solvent molecules and PPFOH chains or not. We select chloroform (CF) and tetrahydrofuran (THF) as solvents in this research because of their good solubility to PPFOH.…”

Section: Methodsmentioning

confidence: 99%

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Effect of Solvents on the Solution State and Film Condensed State Structures of a Polyfluorene Conjugated Polymer in the Dynamic Evolution Process from Solution to Film

Zhang

et al. 2019

J. Phys. Chem. C

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Although much progress has been made in basic research on conjugated polymers and their practical applications in optoelectronic devices, so far research on the solution state, especially on the effect of solvent on conjugated polymers solution state and films condensed state structure in the dynamic evolution process from solution to film, is scarce. In this research, we focused on a special polyfluorene conjugated polymer, poly(9-(4-(octyloxy)phenyl)-2,7-fluoren-9-ol) (PPFOH), hydrogen bonding with supramolecular conjugated polymers in which intermolecular hydrogen bonds could be formed with different solvents, to explore the effect of solvents on PPFOH’s solution state and the film’s condensed state structure in the dynamic evolution process from solution to film. Dynamic/static light scattering, giving shape parameters and fractal dimension, UV–vis absorption spectra, photoluminescence spectra, fluorescence lifetime measurements, and transmission electron microscopy were used for this research. It was found that chain aggregation size, shape, and aggregated density presented obvious differences in PPFOH solutions with different solvents. Chain aggregation size was obviously increased in PPFOH chloroform (CF)/tetrahydrofuran (THF) mixed solution with different THF ratios, such as 0% THF (pure CF solvent), with CF/20% THF mixed solvent, and 100% THF solvent. A stretched and rigid chain conformation with dense chain aggregation was present in pure CF solvent, and there was a small number of fine lattice fringes with spacing 0.229 nm and an irregular crystalline appearance with the CF solvent. Although the ordered structures region was increased in the aggregation of PPFOH CF/THF mixed solution with 20% THF, the direction was cluttered with increased lattice fringe spacing of 0.252 nm. However, a large-area and long-range ordered chain aggregation was present in the PPFOH mixed solution with 100% THF solvent, with lattice fringes spacing 0.596 nm, quite high chain aggregation order, and high consistent lattice fringe direction. Interchain interaction between PPFOH chains or between PPFOH chains and solvents molecules (CF or THF) led to the difference in chain aggregate state structure in the PPFOH solution state. More importantly, it was found that there was heredity of the chain condensed state structure from solution to films in CF solvent in the dynamic evolution process due to strong intermolecular hydrogen-bonding interactions between PPFOH molecules in solution state and film. However, the influence of solvent on the film condensed state structure was limited because of solvent evaporation in the filming process, thus leading to enhancement of interchain interactions between PPFOH chains in all solvents. The condensed state structure of the final film was mainly decided by interactions of PPFOH chain itself but no solvents. Therefore, a rule for deciding chain aggregated state structure heredity from solution to film was revealed, that is, whether the intermolecular forces in both the solution and film ar...

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“…[ 1–13 ] Specially relevant are those whose emission can be controlled with temperature, as luminescence can be detected remotely with highly sensitive and fast responsive techniques and offers time and spatial resolution at the macro‐ (e.g., luminescent labels) and nanoscale (e.g., fluorescence microscopy). Inherent thermofluorochromic materials involve thermoresponsive molecular dyes, [ 14–20 ] quantum dots, and lanthanide‐doped nanoparticles, [ 21 ] conjugated polymers, [ 22 ] or polymorphic dyes. [ 23 , 24,25 ] Even though several reports of the materials are available nowadays, their wide range of temperature responses and limited tunability of the color emission and/or switching temperature still hamper their complete implementation in commercial applications.…”

Section: Introductionmentioning

confidence: 99%

Tunable Thermofluorochromic Sensors Based on Conjugated Polymers

Bellacanzone

Otaegui

Hernando

et al. 2022

Advanced Optical Materials

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Even though thermofluorochromic materials are eternal candidates for their use in multiple applications, they are still limited as they require complex synthetic strategies to accomplish tunable optical properties and/or provide optical changes only over a very wide temperature range. By taking advantage of the high sensitivity of the optical properties of conjugated polymers and oligomers to the external environment, herein phase change material (PCM)‐based thermofluorochromic mixtures are created, where the solid‐to‐liquid transition of the PCM host triggers a sharp fluorescence color change of the dispersed polymers/oligomers. Fluorophore conjugation length, concentration, and PCM nature can be used to vary the spectral properties of the resulting materials along the visible region, covering a large part of the CIE 1931 color space. For the preparation of functional devices, this behavior can be directly transferred to the solid state by soaking or printing cellulose papers with the obtained thermofluorochromic mixtures as well as by structuring them into solid lipid particles that can be dispersed within polymer matrices. The resulting materials show very promising features as thermal sensors and anticounterfeiting labels.

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Systematic investigation of self-organization behavior in supramolecular π-conjugated polymer for multi-color electroluminescence

Abstract: Understanding the chain behavior and conformational/aggregation behavior of supramolecular π-conjugated polymer for multi-color electroluminescence.

Cited by 25 publications

References 56 publications

Carbon Nanolights in Piezopolymers are Self‐Organizing Toward Color Tunable Luminous Hybrids for Kinetic Energy Harvesting

Carbon Nanolights in Piezopolymers are Self‐Organizing Toward Color Tunable Luminous Hybrids for Kinetic Energy Harvesting

Effect of Solvents on the Solution State and Film Condensed State Structures of a Polyfluorene Conjugated Polymer in the Dynamic Evolution Process from Solution to Film

Tunable Thermofluorochromic Sensors Based on Conjugated Polymers

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