Light-Emitting Characteristics of Conjugated Polymers

Shim, Hong‐Ku; Jin, Jung‐Il

doi:10.1007/3-540-44608-7_4

Cited by 73 publications

(17 citation statements)

References 76 publications

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“…Light‐emitting and charge‐ (electron‐ and hole‐) transporting polymers have attracted much attention as organic materials for electroluminescent (EL) devices 9, 10. Active research on EL materials has been done all over the world 9, 11–14. In the case of applications of these polymers to the EL devices, an important problem is how intermolecular interaction and aggregation during annealing or passage of current, which results in less emitting properties, are suppressible.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of liquid‐ crystalline triblock copolymers by ATRP, having electron‐transporting thiadiazole unit

Nakashima

Sato

Yamaguchi

2007

Polymer International

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ABA-type block copolymers composed of 2,5-diphenyl-1,3,4-thiadiazole (DPTD) oligoester and poly(methyl methacrylate) (PMMA) segments (M n = 16 200 and 23 000) were synthesized by atom-transfer radical polymerization and their liquid-crystalline (LC) and photoluminescence (PL) properties were examined. The structures of block copolymers were identified by Fourier transform infrared and 1 H NMR spectroscopies. Differential scanning calorimetry measurement, polarizing microscopy observation and wide-angle X-ray analysis revealed that the block copolymers form thermotropic LC phase (smectic C) independent of molecular weights of PMMA segments, but a model polymer (PMMA segments having the DPTD unit in the central part) has no LC melt. Solution and solid-state PL spectra indicated that all the block copolymers display blue emission arising from the DPTD unit. Their quantum yields are 17-21%, which increase with the PMMA chain lengths. The block copolymers have good aligned structures in the LC states, but their order parameter (S) values in sheared LC states were lower than those in the sheared LC compounds. The PL properties in the LC states were independent of the LC aligned structures. Cyclic voltammetry measurements showed that these block copolymers have deep HOMO levels compared with polymers composed of oxadiazole rings.

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Section: Introductionmentioning

confidence: 99%

Synthesis and properties of liquid‐ crystalline triblock copolymers by ATRP, having electron‐transporting thiadiazole unit

Nakashima

Sato

Yamaguchi

2007

Polymer International

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“…The UV visible spectra show similar allures with one absorption maxima at 364 nm, which is attributed to the p ? p ⁄ transitions in the PPV system [23]. The analysis of the optical absorption spectra reveals the optical energy gap (E g ) between the HUMO and LUMO band due to p ?…”

Section: Optical Properties Of the Thin Filmsmentioning

confidence: 99%

Effect of the side-chain size on the optical and electrical properties of confined-PPV derivatives

Benzarti-Ghédira

Hrichi

Jaballah

et al. 2015

Superlattices and Microstructures

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“…Friend research group from Cambridge (UK) in 1989 [1] have attracted a huge interest for this class of conjugated polymers due to their organic light-emitting diodes (OLED), [2][3][4][5][6][7] organic field-effect transistors (OFET), [8,9] and photovoltaic applications. [10][11][12] The advantages of using conjugated polymers in electronics are based both on their good processability, flexibility, and environmental stability relative to inorganic counterparts and large scale of applications.…”

Section: Introductionmentioning

confidence: 99%

Linear and hyperbranched triphenylamine-based polyarylenevinylenes: a comparative optoelectronic study

Ivan¹,

Vacareanu²,

Grigoraş³

2013

Designed Monomers and Polymers

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The synthesis of triphenylamine-based polyarylenevinylene with linear and hyperbranched architecture is described. The synthetic route is based on Wittig polycondensation reaction at room temperature using as partners di-or tri-aldehyde of triphenylamine and bis-or tris-phosphonium salts. The polymers are separated as two fractions, one insoluble in chloroform and another one soluble in chloroform and insoluble in methanol. All polymers are obtained mostly in cis configuration, but cis linear polymers are thermally isomerized to corresponding trans structures, while branched structures are more thermally stable and isomerization process was not clearly evidenced. Characterization of the polymers was performed using NMR and FT-IR spectroscopy and thermal gravimetric analysis, while the optoelectronic properties were studied by UV-Vis and fluorescence and cyclic voltammetry, and compared with model compounds.

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Light-Emitting Characteristics of Conjugated Polymers

Cited by 73 publications

References 76 publications

Synthesis and properties of liquid‐ crystalline triblock copolymers by ATRP, having electron‐transporting thiadiazole unit

Synthesis and properties of liquid‐ crystalline triblock copolymers by ATRP, having electron‐transporting thiadiazole unit

Effect of the side-chain size on the optical and electrical properties of confined-PPV derivatives

Linear and hyperbranched triphenylamine-based polyarylenevinylenes: a comparative optoelectronic study

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