National Science Council

Tsinghua University

National Science Council of Taiwan

Show-An Chen

Gue-Wuu Hwang

Liang-Chang Lin

Yuh-Zheng Lee

Xiwen Chen

Jin-long Liao

Yongmin Liang

Chien-Hsiun Liao

Hsin-Hung Lu

Chin-Chang Lee

Chih-Hao Chang

Sih-Hao Liao

Yun-Chung Wu

Ching-Yang Liu

Mu-Yi Hua

Yun-Sheng Ma

An water/alcohol soluble electron-injection/hole-blocking composite layer contains a conjugated polymer grafted with a side chain crown ether and with pseudo-metallic state of metal-ion stabilized by the crown ether (to reduce electron-injection barrier and facilitate electron transport), and a polymer with hole-blocking function. This composite layer is able to improve the performance of an organic light emitting diode with oxygen- and moisture-stable cathode (such as Al and Au), and the performance of an organic solar cell.

Composite material of hole-blocking polymer and electron-injection/electron-transport conjugated polymer grafted with crown ether into which metal ion is intercalated, and uses thereof in OLED and organic solar cell

A simple and efficient method for transforming conformation of parts of chains in the amorphous phase in a conjugated polymer to extended conjugation length (termed as &#x3b2; phase) is disclosed. The &#x3b2; phase acts as a dopant and can be termed self-dopant. The generated self-dopant in the amorphous host allows an efficient energy transfer and charge trapping to occur and leads to more balanced charge fluxes and more efficient charge recombination. For example, a polyfluorene film was dipped into a mixed solvent/non-solvent, tetrahydrofuran/methanol in volume ratio of 1:1, to generate a &#x3b2;-phase content up to 1.32%. A polymer light emitting diode with the dipped polyfluorene film as a light emitting layer therein provides a more pure and stable blue-emission (solely from the self-dopant) with CIE color coordinates x+y&#x3c;0.3 and a performance of 3.85 cd A(external quantum efficiency 3.33%) and 34326 cd m.

Method of increasing beta-phase content in a conjugated polymer useful as a light emitting layer in a polymer light emitting diode

This invention provides a new electroluminescent conjugated polymers grafted with highly efficient phosphorescent organometallic complexes (such as iridium, platinum, osmium, rubidium, etc.) and charge transport moieties (such as oxadiazole, thiadiazole, triazole, pyridine, pyrimidine, substituted or non-substituted tertiary arylamines, substituted or non-substituted quarternary arylammonium salts, substituted or non-substituted tertiary heterocyclic aromatic amines, substituted or non-substituted quarternary heterocyclic aromatic ammonium, etc.). The emissive polymers (fully conjugated or limited conjugating length) covering the full visible range can be prepared. The polymeric light emitting diodes with these materials can be used as indicators, light source and display for cellular phones, digital camera, pager, portable computer, personal data acquisition (PDA), watch, hand-held videogame, billboard, etc.

Electroluminescent conjugated polymers containing phosphorescent moieties and the application thereof in LED

Electroluminescent conjugated polymers containing phosphorescent moieties and the application thereof in led

This invention provides a method for syntheses of new electroluminescent conjugated polymers modified with high electronegative heterocyclic groups (such as 1,3,4-oxadiazole-diyl, 1,3,4-thiadiazole-diyl, and 1,2,4-triazole-diyl). These electroluminescent polymers (homopolymers, statistical copolymers or block coplymers) are obtained by polymerization of bis(halomethyl) arenes modified with heterocyclic groups via the Wessling precursor route, Gilch side chain route, Wittig reaction or Wittig-Hornor reaction. By a proper selection of the monomers and their ratios in the polymerization, the emissive polymers (fully conjugated or limited conjugating length) covering the full visible range even extending to the near-IR range can be prepared. The polymeric light emitting diodes (PLED) with these materials as emissive layer or electron transport layer have high external quantum efficiency and can be used as indicators and displays for cellular phones, pagers, portable computer, wristwatch, toys, etc.

Electroluminiscent conjugated polymers modified with high electronegative heterocyclic moieties and their applications in polymeric light emitting diodes

An electroconductive polymer composite for use in secondary batteries as positive electrode active materials is disclosed. It includes 10-99 weight percent of a conjugated electroconductive polymer, such as polyaniline, and 90-1 weight percent of polymeric electrolyte. The latter is composed of 10-90 weight percent of an ionic salt, such as LiClO.sub.4, and 90-10 weight percent of a polymer which can form an electrolyte material with the ionic salt. The polymer, for example, can be polyvinyl alcohol or polyalkylene oxide. A method of using the electroconductive polymer composite to prepare the positive electrode of secondary batteries is also disclosed. It includes the steps of dissolving the above three components in an appropriate solvent (such as 1-methyl-2-pyrrolidinone), casting the resulting solution on an appropriate metallic grid or plate (such as nickel, aluminum or platinum) and removing the solvent therein to form a film which adheres to the metal grid or plate, in which the film is a positive electrode active material and the metallic grid or plate is a current collector. This invention also discloses a non-aqueous secondary battery which uses such positive electrode.

Electroconductive polymer composites for use in secondary batteries as

Method for preparing and using electroconductive polymer composites as

The present invention discloses a process for preparing an aqueous solution of self-acid-doped o-sulfonic acid ring-substituted polyaniline, which can be cast into free-standing films. The process involves dissolving a solid o-sulfonic acid ring-substituted polyaniline in an alkaline aqueous solution to form an aqueous solution of an undoped o-sulfonate ring-substituted polyaniline; purifying the aqueous solution of the undoped o-sulfonate ring-substituted polyaniline by subjecting it to a purifying treatment to remove excess alkali therefrom; and contacting the resulting purified aqueous solution with a H.sup.+ -type ion-exchange resin to form an aqueous solution containing a self-acid-doped o-sulfonic acid ring-substituted polyaniline. A suitable water soluble polymer or polymer emulsion can be easily mixed with the aqueous solution containing the self-acid-doped o-sulfonic acid ring-substituted polyaniline to form a polymer blend.

Preparation of self-acid-doped sulfonic acid ring-substituted

The present invention discloses a water-soluble self-acid-doped polyaniline, and its sodium salt, which can be cast into free-standing films from their aqueous solutions. A process for preparing a water-soluble self-acid-doped polyaniline is also disclosed, which comprises reacting a polyaniline with a strong base to convert the amino nitrogen thereof to anionic nitrogen; reacting sultone with the anionic nitrogen to form a side chain alkanesulfonic acid group; doping with protonic acid to form precipitate; dissolving (undoping) the precipitate in an alkaline aqueous solution; removing excess alkali from the alkaline aqueous solution; and contacting the resulting aqueous solution with a H.sup.+ -type ion exchange resin. Moreover, an aqueous solution of the present water-soluble self-acid-doped PAn can be easily mixed with an additional water soluble polymer or polymer emulsion, which can then be cased into a polymer blend film having improved mechanical properties and coupling strength to a substrate.

Water-soluble self acid-doped polyaniline, method of preparation

A method for preparing a processable polyisothianaphthene polymer includes steps of dissolving an isothianaphthene monomer in a solvent and introducing therein an initiator to initiate a polymerization reaction to produce a precursor of poly(dihydroisothianaphthene), dissolving thoroughly the precursor of poly(dihydroisothianaphthene) in the solvent in an appropriate ratio to obtain a poly(dihydroisothianaphthene) solution, proceeding a dehydrogenation reaction for the poly(dihydroisothianaphthene) solution by introducing a dehydrogenation agent to obtain a polyisothianaphthene microgel solution, and terminating the dehydrogenation reaction by introducing an inhibitor. This invention offers a simple, feasible, and economical way to prepare a large-area film with uniform film thickness, excellent stability, and good electrochromic, conducting, and mechanical properties.

Method for preparing processable polyisothianaphthene

Electroconductive polymer composites as positive electrode active

Water-soluble self-acid-doped polyaniline, method of preparation

This invention relates to homogeneously doped conductive polymer and a polymer blend thereof, wherein the dopant is a protonic acid having long carbon chain or larger substituent group. The resulting doped conductive polymer solution and polymer blend solution thereof can be cast to form free-standing films with metallic luster, of which the conductivities remain stable in the ambient condition and are in the range of 10.sup.-6 to 10.sup.-1 S/cm. The conductive polymer film and the conductive polymer composite film so prepared can be utilized in the anti-static wrapping materials for electronic components, and in electromagnetic interference shielding.

Growing community of inventors

Hsinchu, Taiwan

Show-An Chen