Organic electroluminescent device
View Patent ↗An organic electroluminescent device is disclosed, which can obtain high luminance and high efficiency. The organic electroluminescent device includes a luminescent layer formed by doping a phosphor material on a host material expressed by the following chemical formula: where R is any one selected from a group consisting of H, an alkyl group, an allyl group, and halogen.
1. A red electroluminescent device having a layered structure in which an anode, an organic layer, and a cathode are sequentially formed on a substrate, wherein the organic layer includes a luminescent layer formed by doping a phosphor material on a host material, Almq 3 , expressed by the following chemical formula:
where R is selected from the group consisting of hydrogen, an alkyl group, an aryl group, and a halogen, wherein the phosphor material is PtOEP.
2. The red electroluminescent device of claim 1 , wherein R is an alkyl group having a carbon number within the range of 1 to 20 (C 1-20 ).
3. The red electroluminescent device of claim 1 , wherein R is an aryl group selected from group consisting of benzene, naphthalene, anthracene, and phenanthrene.
4. The red electroluminescent device of claim 1 , wherein R is a halogen selected from the group consisting of fluorine, chlorine, and bromine.
5. The red electroluminescent device of claim 1 , wherein R is hydrogen.
6. The red electroluminescent device of claim 1 , wherein the hole injection layer is formed of copper(II)phthalocyanine (CuPC).
7. A red electroluminescent device having a layered structure in which an anode, an organic layer, and a cathode are sequentially layered on a substrate, wherein the organic layer is formed by sequentially depositing a hole injection layer, a hole transport layer, a luminescent layer, an electron transport layer, and an electron injection layer and wherein the luminescent layer is formed by doping a phosphor material on a host material, Almq 3 , expressed by the following chemical formula:
where R is selected from the group consisting of hydrogen, an alkyl group, an aryl group, and a halogen, wherein the phosphor material is PtOEP.
8. The red electroluminescent device of claim 7 , wherein R is an alkyl group having a carbon number within the range of 1 to 20.
9. The red electroluminescent device of claim 7 , wherein R is an aryl group selected from the group consisting of benzene, naphthalene, anthracene, and phenanthrene.
10. The red electroluminescent device of claim 7 , wherein R is a halogen selected from the group consisting of fluorine, chlorine, and bromine.
11. The red electroluminescent device of claim 7 , wherein R is hydrogen.
12. The red electroluminescent device of claim 7 , wherein the hole transport layer is formed of triphenyl amine derivatives.
13. The red electroluminescent device of claim 7 , wherein the electron transport layer is formed of Alq 3 .
14. The red electroluminescent device of claim 7 , wherein the electron injection layer is formed of alkali metal derivatives.