ORGANIC LIGHT EMITTING DEVICE
An organic light emitting device having improved hole injection and hole transport capabilities is disclosed, wherein the device includes a first electrode, an organic layer, and a second electrode, wherein the organic layer includes a compound represented by Formula 1 and a phenylamine-based compound. Formula 1 together with the phenylamine-based compound improves the charge mobility of the hole transport layer.
1 . An organic light-emitting device comprising:
a first electrode;
an organic layer; and
a second electrode,
wherein the organic layer comprises a compound of Formula 1 and a phenylamine-based compound
2 . The organic light-emitting device of claim 1 , wherein the amount of the compound of Formula 1 is in a range of about 1 to about 10 parts by weight based on 100 parts by weight of the total weight of the compound of Formula 1 and the phenylamine-based compound.
3 . The organic light-emitting device of claim 1 , wherein the phenylamine-based compound comprises a compound from the group consisting of N,N′-Di-[(1-naphthalenyl)-N—N′-diphenyl]-1,1′-biphenyl)-4,4′-diamine (NPB) having the below formula and N,N′-di-(3-methylphenyl)-N,N-diphenyl-4,4′-diaminobiphenyl (TPD), having the below formula, and mixtures thereof,
4 . The organic light-emitting device of claim 1 , wherein the organic layer is a hole injection layer, a hole transport layer, or an intermediate layer functioning as a hole injection layer and a hole transport layer.
5 . The organic light-emitting device of claim 1 , further comprising at least one selected from the group consisting of a hole injection layer, an emission layer, an electron transport layer, and an electron injection layer.
6 . The organic light-emitting device of claim 5 , wherein the hole injection layer comprises a material selected from the group consisting of copper phthalocyanine (CuPc), 4,4′,4″-tris(3-methylphenylphenylamino) triphenylamine (m-MTDATA), N,N′-di(1-naphthyl)-N,N′-diphenylbenzidine (NPB), (4,4′,4″-tris(N,N-diphenylamino)triphenylamine) (TDATA), (4,4,4-tris(n-(2-naphthyl)-n-phenyl-amino)-triphenylamine) (2-TNATA), (Polyaniline/Dodecylbenzenesulfonic acid) (Pani/DBSA), (Poly(3,4-ethylenedioxythiophene)/Poly(4-styrenesulfonate) (PEDOT/PSS), Pani/CSA (Polyaniline/Camphor sulfonicacid), (Polyaniline)/Poly-(4-styrenesulfonate) (PANI/PSS), and combinations thereof.
7 . The organic light-emitting device of claim 1 , further comprising an emission layer including a phosphorescent dopant.
8 . The organic light-emitting device of claim 7 , wherein the phosphorescent dopant is Ir(2-phenylpyridine)3 (Ir(ppy)3), iridiumbis[4,6-di-fluorophenyl)-pyridinato-N,C2′]picolinate (F2Irpic), and/or mixtures thereof.
9 . The organic light-emitting device of claim 7 , wherein the phosphorescent dopant is an organic metal complex including Ir, Pt, Os, Re, Ti, Zr, Hf, or a combination of at least two thereof.
10 . The organic light-emitting device of claim 5 , wherein the electron transport layer comprises an electron transporting organic compound and a metal-containing material.
11 . The organic light-emitting device of claim 10 , wherein the metal-containing material comprises an Li complex.