Organic electroluminescent device

1. An organic light-emitting device (OLED) comprises an anode, a cathode, and one or more organic layers, wherein the said one or more organic layers contains at least one compound having the formula I:

wherein,

R 1 -R 8 independently represent hydrogen, halogen, cyano, nitro, C1-C8 alkyl, C1-C8 alkoxy, C2-C8 substituted or unsubstituted alkenyl, C2-C8 substituted or unsubstituted alkynyl, C1-C4 alkyl substituted or unsubstituted phenyl, or C1-C4 alkyl substituted or unsubstituted naphthyl; and,

Ar 1 -Ar 4 independently represent C1-C4 alkyl or C6-C30 aryl substituted phenyl, C1-C4 alkyl or C6-C30 aryl substituted naphthyl, phenyl, naphthyl, C6-C30 N-aryl or C1-C4 alkyl-substituted carbazolyl, dibenzothiophenyl, dibenzofuranyl, anthryl, phenanthryl, pyrenyl, perylenyl, fluoranthenyl, (9,9-di-alkyl) fluorenyl, (9,9-dialkyl-substituted or unsubstituted aryl) fluorenyl, or 9,9-spiro-fluorenyl.

2. The OLED according to claim 1 , wherein:

R 1 -R 8 independently represent hydrogen, halogen, C1-C4 alkyl, C1-C4 alkyl substituted or unsubstituted phenyl, or C1-C4 alkyl substituted or unsubstituted naphthyl; and

Ar 1 -Ar 4 independently represent phenyl, tolyl, t-butyl phenyl, naphthyl, methyl naphthalene, biphenyl, diphenyl phenyl, naphthyl phenyl, diphenyl-biphenyl, biaryl amine phenyl, N-phenyl-carbazolyl, (9,9-di-alkyl) fluorenyl, (9,9-dialkyl-substituted or unsubstituted phenyl) fluorenyl, or 9,9-spiro-fluorenyl.

3. The OLED according to claim 2 , wherein,

R 1 , R 4 , R 5 , and R 8 are hydrogen, R 2 , R 3 , R 6 , and R 7 independently represent hydrogen, fluorine, methyl, ethyl, propyl, isopropyl, tert-butyl, phenyl, or naphthyl; and

Ar 1 -Ar 4 independently represent phenyl, tolyl, naphthyl, methyl naphthyl, biphenyl, diphenyl phenyl, naphthyl phenyl, diphenyl-biphenyl, (9,9-di-alkyl) fluorenyl, (9,9-dimethyl-substituted or unsubstituted phenyl) fluorenyl, or 9,9-spiro-fluorenyl.

4. The OLED according to claim 3 , wherein:

Ar 2 , Ar 3 , and Ar 4 independently represent phenyl, naphthyl, or biphenyl, and

Ar 1 is phenyl, naphthyl, biphenyl, diphenyl phenyl, naphthyl phenyl, diphenyl-biphenyl, (9,9-di-alkyl) fluorenyl, (9-tolyl, 9′-phenyl) fluorenyl, or 9,9-spiro-fluorenyl.

5. The OLED according to claim 4 , wherein:

R 2 , R 3 , R 6 , and R 7 are hydrogen, and

Ar 2 , Ar 3 , and Ar 4 independently represent phenyl or naphthyl.

6. An organic light-emitting device (OLED) comprises an anode, a cathode, and one or more organic layers, wherein the said one or more organic layers contains at least one compound having one of the following structures:

7. The OLED according to claim 6 , wherein the said at least one compound is one or more of the following compounds:

8. The OLED according to claim 1 , wherein the said one or more organic layers is one or more layers that may contain one or more of: hole injection layer, hole transport layer, light emitting layer, hole blocking layer, or electron transport layer.

9. The OLED according to claim 8 , wherein the said hole transport layer, electron transport layer and/or light emitting layer contains the said at least one compound with formula (I).

10. The OLED according to claim 9 , wherein the said at least one compound with formula (I) is located at the light emitting layer.

11. The OLED according to claim 10 , wherein the said light-emitting layer is a non-doped system or guest-host doped system composed of a host material and/or guest material.

12. The OLED according to claim 11 , wherein the said at least one compound with formula (I) is the host material and/or guest material.