ORGANIC ELECTROLUMINESCENT DEVICE

1 . An organic electroluminescent device, comprising a green emission layer, comprising:

a green emission material; and

a blue emission material,

wherein the green emission layer is interposed between a pair of electrodes, and

wherein the blue emission material is selected from compounds represented by the following molecular structures:

2 . The organic electroluminescent device of claim 1 ,

wherein a concentration of the blue emission material is in a range of 80 to 120 parts by weight based on 100 parts by weight of the green emission material.

3 . The organic electroluminescent device of claim 1 ,

wherein the blue emission material has a maximum absorption wavelength of about 420 nm to 480 nm.

4 . The organic electroluminescent device of claim 1 ,

wherein the green emission material comprises a compound selected from the group consisting of Tb(acac) 3 , Coumarin 6, NSD, Coronene, OXD-2, OXD-3, Alq3, and a mixture of Coumarin 6 and Alq3, which are represented by the following molecular structures:

5 . The organic electroluminescent device of claim 1 ,

wherein the emission layer is about 300 Å to 500 Å thick.

6 . The organic electroluminescent device of claim 1 , wherein the green emission layer further comprises:

a dopant selected from a group consisting of C314S, C343S, C7, C7S, C6, C6S, C314T, and C545T, which are represented by the following molecular structures:

7 . The organic electroluminescent device of claim 6 ,

wherein a concentration of the dopant is in the range of 0.2 to 3 parts by weight based on 100 parts of the total weight of the green emission material and the blue emission material.

8 . The organic electroluminescent device of claim 1 , further comprising at least a layer selected from the group consisting of:

a hole injection layer;

a hole transport layer;

an electron injection layer;

an electron transport layer; and

a hole blocking layer.

9 . An organic electroluminescent device, comprising:

a first electrode;

a hole transport layer formed on the first electrode;

a green emission layer comprising a green emission material and a blue emission material and formed on the hole transport layer;

an electron transport layer formed on the green emission layer; and

a second electrode formed on the electron transport layer,

wherein the blue emission material is selected from compounds represented by the following molecular structures:

10 . The organic electroluminescent device of claim 9 ,

wherein a concentration of the blue emission material is in a range of 80 to 120 parts by weight based on 100 parts by weight of the green emission material.

11 . The organic electroluminescent device of claim 9 ,

wherein the green emission material comprises a compound selected from the group consisting of Tb(acac) 3 , Coumarin6, NSD, Coronene, OXD-2, and OXD-3, which are represented by the following molecular structures:

12 . The organic electroluminescent device of claim 9 , wherein the green emission layer further comprises:

a dopant selected from the group consisting of C314S, C343S, C7, C7S, C6, C6S, and C314T, which are represented by the following formulas:

13 . The organic electroluminescent device of claim 12 ,

wherein a concentration of the dopant is in a range of 0.2 to 3 parts by weight based on 100 parts of the total weight of the green emission material and the blue emission material.

14 . The organic electroluminescent device of claim 13 ,

wherein the green emission layer further comprises a dopant selected from Coumarin 6 and C545.

15 . The organic electroluminescent device of claim 9 , further comprising:

a hole injection layer formed between the first electrode and the hole transport layer.

16 . The organic electroluminescent device of claim 9 , further comprising:

an electron injection layer formed between the electron transport layer and the second electrode.