Interlayer Interactions in Self-Assembled Poly(Phenylene Vinylene) Multilayer Heterostructures, Implications for Light-Emitting and Photorectifying Diodes

1994 ◽  
Vol 369 ◽  
Author(s):  
A.C. Fou ◽  
O. Onitsuka ◽  
M. Ferreira ◽  
M.F. Rubner ◽  
B.R. Hsieh
Keyword(s):  
Ultrathin Films ◽  
Self Assembly ◽  
Organic Light Emitting Diodes ◽  
Phenylene Vinylene ◽  
Layer By Layer ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Emission Color ◽  
Multilayer Heterostructures ◽  
Self Assembled

AbstractLayer-by-layer molecular self-assembly has been used to fabricate multilayer heterostructures containing poly(phenylene vinylene) (PPV) and a variety of polyanions. These ultrathin films exhibit widely different photoluminescence intensities and peak positions (emission color) depending on the polyanion used. The characteristics of light-emitting devices based on such films are described. This represents the first demonstration of working organic light-emitting diodes, the active layer of which consists of ultrathin, self-assembled films of between 130 - 500 Å

Microring light-emitting devices with self-assembled multilayer structures based on poly(p-phenylene vinylene)s

2001 ◽  
Vol 121 (1-3) ◽  
pp. 1739-1740 ◽  
Author(s):  
T. Fujisawa ◽  
T Sonoda ◽  
R. Ootake ◽  
A. Fujii ◽  
K. Yoshino
Keyword(s):  
Multilayer Structures ◽  
Phenylene Vinylene ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Self Assembled

Luminescence Behavior of Self-Assembled Multilayer Heterostructures of Poly (Phenylenevinylene)

1993 ◽  
Vol 328 ◽  
Author(s):  
Marysilvia Ferreira ◽  
M. F. Rubner ◽  
B. R. Hsieh
Keyword(s):  
Self Assembly ◽  
Phenylene Vinylene ◽  
Multilayer Thin Film ◽  
Sulfonated Polystyrene ◽  
Photoinduced Charge Transfer ◽  
Multilayer Heterostructures ◽  
Assembly Technique ◽  
Self Assembled ◽  
Photoinduced Charge ◽  
Luminescence Behavior

ABSTRACTMultilayer thin film heterostrutuctures comprised of alternating layers of a poly (phenylene vinylene) (PPV) precursor and various polyanions were fabricated using a new self-assembly technique. Thermal treatment of these films produced multilayers of the fully conjugated form of PPV. Alternating Multilayers fabricated with inert polyanions such as sulfonated polystyrene exhibited a very strong photoluminescence whereas alternating multilayers fabricated with electron acceptor polyanions such as sulfonated C?O and poly (thiophene acetic acid) displayed a highly quenched luminescence. This latter behavior suggests that self-assembled Multilayers can be used to examine photoinduced charge transfer interactions between PPV and various electron acceptors.

FABRICATION AND CHARACTERIZATION OF SPIN SELF-ASSEMBLED PPV/MONTMORILLONITE MULTILAYER THIN FILMS

2004 ◽  
Vol 13 (03n04) ◽  
pp. 581-586
Author(s):  
TAE-HO KIM ◽  
O OK PARK
Keyword(s):  
Thin Films ◽  
Self Assembly ◽  
Environmental Stability ◽  
Phenylene Vinylene ◽  
Multilayer Thin Films ◽  
Layer By Layer ◽  
Assembly Method ◽  
Fabrication And Characterization ◽  
Self Assembled

Multilayer nanostructural thin films through a layer-by-layer spin self-assembly method were prepared using poly(p-phenylene vinylene)/montmorillonite. Sodium montmorillonite particles exfoliated into single sheets and cationic PPV precursor and such anionic MMT plates were spin self-assembled by electrostatic attraction. Self-assembled MMT layers blocked the penetration of oxygen and moisture and they reduced the photo-oxidation of the emitting material. Spin self-assembled films showed higher environmental stability and luminescence, and their PL spectra were somewhat different from that of bulk PPV films.

Preparation and Characterization of Quaternary Chitosan/sodium Alginate Self-Assembled Microcapsules

2012 ◽  
Vol 554-556 ◽  
pp. 263-267
Author(s):  
Hui Chen ◽  
Xiao Hui Wang ◽  
Dong Li ◽  
Yan Zhu Guo ◽  
Run Cang Sun
Keyword(s):  
Sodium Alginate ◽  
Self Assembly ◽  
Colloidal Particles ◽  
Red Light ◽  
Formaldehyde Resin ◽  
Layer By Layer ◽  
Light Emitting ◽  
Resin Microspheres ◽  
Self Assembled

Biocompatible quaternary chitosan/sodium alginate multilayer microcapsules were prepared by layer-by-layer (LBL) self-assembly on the template of monodispersed melamine formaldehyde resin microspheres (MF). The process of self-assembly was monitored by measuring the surface zeta-potential of colloidal particles. The particle size was determined by digital light scattering (DLS) after each deposition, and the average thickness of monolayer film was revealed to be 3.9 nm. Using rhodamine B-labeled quaternary chitosan as the positive polyelectrolyte and sodium alginate as the negative polyelectrolyte, self-assembled multilayer microcapsules with strong red-light emitting were obtained and observed with fluorescence microscope. The fluorescent microcapsules self-assembled from the biocompatible natural polysaccharides may be potentially applied in drug delivery and fluorescence diagnosis.

THE APPLICATION OF SELF-ASSEMBLY MONOLAYER TECHNIQUE INTO FABRICATING MULTILAYER NANOFILM

2004 ◽  
Vol 03 (04n05) ◽  
pp. 649-654 ◽  
Author(s):  
Z. PENG ◽  
L.-X. KONG
Keyword(s):  
Self Assembly ◽  
Optical Materials ◽  
Nonlinear Optical ◽  
Nonlinear Optical Materials ◽  
Layer By Layer ◽  
Simple Process ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Conductive Films ◽  
Printing Technique

Self-Assembly Monolayer (SAM) technique, as a novel and developing technique for fabricating layer-by-layer nanofilm on substrates of various sizes, shapes and materials, has received more and more attention in the areas of light-emitting devices, nonlinear optical materials, conductive films, permselective gas membranes, sensors, modification of electrodes, resistance and printing technique. In comparison with other traditional methods, SAM technique has many significant advantages, including simple process, universality, formation with densely packed, well defined, highly ordered surfaces. This paper will give a review on the recent development in SAM technique.

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