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Thermal transfer film and organic electroluminescent device prepared using same

A technology of thermal transfer film and light-to-heat conversion layer, which is applied in printing devices, printing, circuits, etc., can solve the problems of difficult dispersion, low durability, and difficulty in maintaining the coating appearance and uniformity of the light-to-heat conversion layer.

Active Publication Date: 2016-02-10
CHEIL IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since carbon black tends to agglomerate, it is difficult to disperse uniformly, thus making it difficult to maintain a good coating appearance and uniformity of the light-to-heat conversion layer
In addition, organic dyes or pigments, or metal complexes can obtain uniform coating, but exhibit low durability against heat or light

Method used

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  • Thermal transfer film and organic electroluminescent device prepared using same
  • Thermal transfer film and organic electroluminescent device prepared using same
  • Thermal transfer film and organic electroluminescent device prepared using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] 5 parts by weight of a UV-curable acrylate resin, 60 parts by weight of a tungsten oxide particle dispersion, and 0.5 parts by weight of an initiator were added to 100 parts by weight of methyl ethyl ketone as a solvent. Then, the prepared composition was stirred for 30 minutes, thereby preparing a composition for a light-to-heat conversion layer. The composition was coated on the base film with an applicator, then dried in an oven at 80 °C for 2 minutes, and heated at 300 mJ / cm under a nitrogen atmosphere. 2 Curing was performed to prepare a film including a light-to-heat conversion layer having a thickness of 3 μm.

Embodiment 2

[0093] 30 parts by weight of a UV-curable acrylate resin, 30 parts by weight of a tungsten oxide particle dispersion, and 0.5 parts by weight of an initiator were added to 100 parts by weight of methyl ethyl ketone as a solvent. Then, the prepared composition was stirred for 30 minutes, thereby preparing a composition for a light-to-heat conversion layer. The composition was coated on the base film with an applicator, then dried in an oven at 80 °C for 2 minutes, and heated at 300 mJ / cm under a nitrogen atmosphere. 2 Curing was performed to prepare a film including a light-to-heat conversion layer having a thickness of 3 μm.

Embodiment 3

[0095] With 50 parts by weight of UV-cured acrylate resin, 20 parts by weight of tungsten oxide particle dispersion, 40 parts by weight of carbon black dispersion, 0.5 parts by weight of initiator and 1.0 parts by weight of dispersant (acrylic polymer dispersion agent) was added to 100 parts by weight of methyl ethyl ketone as a solvent. Then, the prepared composition was stirred for 30 minutes, thereby preparing a composition for a light-to-heat conversion layer. The composition was coated on the base film with an applicator, then dried in an oven at 80 °C for 2 minutes, and heated at 300 mJ / cm under a nitrogen atmosphere. 2 Curing was performed to prepare a film including a light-to-heat conversion layer having a thickness of 3 μm.

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Abstract

The thermal transfer film comprises a base layer and a photothermal conversion layer formed on the upper surface of the base layer, wherein the photothermal conversion layer may comprise at least one particle selected from tungsten oxide particles and composite tungsten oxide particles, and wherein the content of the particles in the photothermal conversion layer is from about 20wt% to about 65wt%. Also disclosed using the thermal transfer film prepared organic electroluminescent apparatus.

Description

technical field [0001] The invention relates to a thermal transfer film and an organic electroluminescent device prepared by using it. More specifically, the present invention relates to a thermal transfer film comprising a light-to-heat conversion (LTHC) layer comprising particles selected from tungsten oxide and an organic electroluminescence device prepared using the same. At least one type of composite tungsten oxide particles. Background technique [0002] A light-to-heat conversion (LTHC) layer absorbs light in a specific wavelength range and converts at least some of the absorbed light into heat. The thermal transfer film includes a light-to-heat conversion layer formed on a receptor substrate and a transfer layer formed on the light-to-heat conversion layer, and the transfer layer is composed of a light-emitting material, or an electron or hole transport compound. When the light-to-heat conversion layer is irradiated with light in an absorption wavelength range, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41M5/46H10K99/00
CPCB41M5/465B41M5/44B41M2205/38H10K71/18H01J9/20B41M5/38242
Inventor 朴时均姜炅求朴世铉李正孝赵成昕
Owner CHEIL IND INC