Electroluminescent polymer nanocomposite material, method of manufacturing the same and organic light emitting display apparatus having the same
View Patent ↗The present invention is related to electroluminescent polymer materials for use in optoelectronic devices. The electroluminescent polymer materials of the invention may comprise a polymer and an electroluminescent organic component, where the water-soluble polyanilin having an electron-hole conductivity may be used as the polymer and one of a cyanine dye, a porphyrin, in the form of J-aggregates, may be used as the electroluminescent organic component.
1. An electroluminescent polymer composition, comprising:
a polymer comprising a water-soluble polyaniline in the range of about 50 wt. % to about 99.5 wt. %, wherein the water-soluble polyaniline has an electron-hole conductivity; and
an electroluminescent organic component comprising a dye selected from the group consisting of a cyanine dye, a squarylium dye and a porphyrin in the range of about 50 wt. % to about 0.5 wt. %, wherein the electroluminescent organic component has a form of J-aggregates.
2. A method for preparing J-aggregates in electrically active polymeric matrixes, comprising:
introducing cyanine dyes into water solutions of polyaniline to transfer the cyanine dyes into a nanocrystalline phase of the J-aggregates;
heating the cyanine dyes to a temperature in the range of about 50° C. to about 70° C.; and
cooling the heated cyanine dyes to a temperature in the range of about 10° C. to about 15° C.
3. The method of claim 2 , wherein the heating and the cooling are repeated.
4. A method for preparing J-aggregates in electrically active polymeric matrixes, comprising:
introducing cyanine dyes into water solutions of polyaniline to transfer the cyanine dyes into a nanocrystalline phase of the J-aggregates; and
multiple thermal cycling by cooling the cyanine dyes to a temperature of about +7° C.; and
heating the cooled cyanine dyes to a temperature of about +20° C.
5. An organic light emitting display apparatus, comprising:
a transparent plate;
a first electrode arranged on the transparent plate; and
a light emitting layer arranged on the first electrode comprising an electroluminescent polymer material, wherein the electroluminescent polymer material comprises:
a water-soluble polyaniline in the range of about 50 wt. % to about 99.5 wt. %, wherein
the water-soluble polyaniline has electron-hole conductivity; and
an electroluminescent organic component comprising a dye selected from the group consisting of a cyanine dye, a squarylium dye or a porphyrin in the range of about 50 wt. % to about 0.5 wt. %, wherein the electroluminescent organic component is a form of a J-aggregate;
a second electrode arranged on the light emitting layer; and
a protecting layer arranged on the second electrode, wherein the protecting layer protects the second electrode and the light emitting layer.