Aromatic compounds and organic light emitting diodes
View Patent ↗A blue organic light emitting diode (LED) comprises a cathode formed on a substrate, a light emitting layer formed on said cathode, and an anode formed on said light emitting layer, which is characterized in that said light emitting layer comprises a compound of the following formulas I or II: wherein Ar 1 and Ar 2 independently are substituted or unsubstituted isochrysenyl Ar 1 —Ar 2 I Ar 1 —Ar 3 —Ar 2 II (triphenylenyl), anthracenyl, naphthalyl, biphenyl, pyrenyl, or phenanthrenyl; Ar 3 is substituted or unsubstituted phenylene, biphenylene, naphthylene, anthracenylene, or fluorenylene.
1. An organic light emitting diode, which comprises: a positive electrode formed on a substrate; a negative electrode; and a light emitting layer disposed between said positive electrode and said negative electrode, wherein said light emitting layer comprises a compound having a formula
2. An organic light emitting diode as claimed in claim 1 further comprising an electron transporting layer formed between said light emitting layer and said negative electrode.
3. The organic light emitting diode as claimed in claim 2 further comprising a hole transporting layer formed between said positive electrode and said light emtting layer.
4. The organic light emitting diode as claimed in claim 2 , wherein said light emitting layer is also a hole transporting layer.
5. The organic light emitting diode as claimed in claim 3 further comprising a hole injection modification layer formed between said positive electrode and said hole transporting layer.
6. The organic light emitting diode a claimed in claim 4 further comprising a hole injection modification layer formed between said positive electrode and said light emitting layer.
7. An organic light diode, which comprises: a postive electrode formed on a substrate; a negative electrode; and a light emitting layer disposed between said postive electrode and said negative electrode, wherein said light emitting layer comprises a compound having a formula
8. The organic light emitting diode as claimed in claim 7 further comprising an electron transporting layer formed between said light emit ing layer and said negative electrode.
9. The organic light emitting diode as claimed in claim 8 further comprising a hole transporting layer formed between paid positive electrode and said light emitting layer.
10. The organic light emitting diode as claimed in claim 8 , wherein said light emitting layer is also a hole transporting layer.
11. The organic light emitting diode as claimed in claim 9 further comprising a hole injection modification layer formed between said positive electrode and said hole transporting layer.
12. The organic light emitting diode as claimed in claim 10 further comprising a hole injection modification layer formed between said positive electrode and said light emitting layer.