Spectroscopic studies on ultrathin poly(p-phenylenevinylene) film deposited by self-assembly and spin-coating methods

Hong, Jong‐Dal; Kim, Doosik; Cha, K.M.; Jin, Jung Il

doi:10.1016/s0379-6779(96)04160-4

Cited by 26 publications

(13 citation statements)

References 6 publications

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“…Figure 1 shows the absorption spectra of a BH-PPV/C 60 -HS multilayer film prepared on a quartz slide. The spectra exhibit a clear absorption around 431 nm, [24] which is the characteristic band of BH-PPV. In aqueous solution, the p±p* absorption was observed at l max = 441 nm.…”

Section: Resultsmentioning

confidence: 98%

Photocurrent Generation in Multilayer Self‐Assembly Films Fabricated from Water‐Soluble Poly(phenylene vinylene)

Zhai

et al. 2003

Chemistry A European J

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A novel, water-soluble, cationic PPV derivative poly[(2,5-bis(3-bromotrimethylammoniopropoxy)-phenylene-1,4-divinylene)-alt-1,4-(2,5-bis(2-(2-hydroxyethoxy)ethoxy))phenylene vinylene] (BH-PPV) has been synthesized by a Heck coupling reaction. Multilayered assemblies of the BH-PPV and the sodium salt of hexa(sulfobutyl)fullerenes (C(60)-HS) were fabricated successfully by an alternate deposition technique. The multilayer structures were studied by UV/Vis spectroscopy, small angle X-ray diffraction, and atomic force microscopy. The photoinduced charge transfer property of the self-assembled multilayer film was also measured by a three-electrode cell technique. A steady and rapid cathodic 5.5 microA cm(-2) photocurrent response was measured as the irradiation of the multilayer film was switched on and off. Importantly, the response of on/off cycling is prompt and reproducible. A possible mechanism for the electron-transfer process is proposed.

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Section: Resultsmentioning

confidence: 98%

Photocurrent Generation in Multilayer Self‐Assembly Films Fabricated from Water‐Soluble Poly(phenylene vinylene)

Zhai

et al. 2003

Chemistry A European J

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“…A layer-by-layer molecular level processing scheme has been also used to fabricate light-emitting diodes from self-assembled polymer layers [38]. Thus, ultrathin films of PPV have been prepared by a selfassembly method based on electrostatic attraction between opposite charges, enabling improved control over thickness and molecular architecture of the film [39].…”

Section: Electroluminescence In Conjugated Polymeric Systemsmentioning

confidence: 99%

The chemistry of electroluminescent organic materials

Segura¹

1998

Acta Polym.

287

200

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Electroluminescence has been a subject of interest for several decades because of its many applications in areas such as telecommunications or information displays. Light‐emitting diodes using p‐n junctions of inorganic semiconductors have dominated the field in the last twenty years; however, efficient blue emission has only recently been achieved and inorganic semiconductors are difficult to form over large areas, making the process uneconomic. During the last decade, an explosive growth of activity in the area of organic electroluminescence has occurred in both academia and industry, stimulated by the promise of light‐emitting plastics for the fabrication of large, flexible, inexpensive and efficient screens to be used in different applications. Thus, a substantial amount of research is presently directed towards color control and improvement of manufacturability and reliability of devices in order to make their commercialization viable. A great deal of work has been carried out by physicists and materials scientists concerned with the preparation of different device structures and with the use of different techniques for device manufacture. However, all this work would not be possible without the continuous efforts of synthetic chemists to prepare materials with enhanced luminescent properties and processabilities. This article provides a review of the main types of organic materials that have been used in the fabrica‐tion of light‐emitting diodes either as emitting materials or as charge‐transport layers. Special attention will be paid to the different synthetic strategies that have been followed in order to tune the color of the emission, to increase stability of materials and to enhance their processabilities.

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“…On the other hand, the fluorescence peak after annealing was red-shifted, and the peak and shoulder (500 and 524 nm, respectively) observed upon excitation at 400 nm were identical to the reported fluorescence spectra of PPV films. 11 These peak and shoulder features indicated that well-packed PPV chains were formed in the particles. 12 It is important to note that no precursor peaks were observed in the UV-vis or fluorescence spectra after thermal annealing.…”

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confidence: 98%

A simple route for fabricating poly(para-phenylene vinylene) (PPV) particles by using ionic liquids and a solvent evaporation process

et al. 2008

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Particles of a poly(para-phenylenevinylene) (PPV) precursor were prepared from an aqueous solution of the polymer by simple evaporation of water from the solution, which also contained an ionic liquid as a poor solvent (self-organized precipitation (SORP) method); PPV precursor nanoparticles were successfully converted to PPV nanoparticles after annealing at 240 degrees C under reduced pressure, this simple process constituting a novel route to nanoparticles of functional polymeric materials.

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Spectroscopic studies on ultrathin poly(p-phenylenevinylene) film deposited by self-assembly and spin-coating methods

Cited by 26 publications

References 6 publications

Photocurrent Generation in Multilayer Self‐Assembly Films Fabricated from Water‐Soluble Poly(phenylene vinylene)

Photocurrent Generation in Multilayer Self‐Assembly Films Fabricated from Water‐Soluble Poly(phenylene vinylene)

The chemistry of electroluminescent organic materials

A simple route for fabricating poly(para-phenylene vinylene) (PPV) particles by using ionic liquids and a solvent evaporation process

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