Organic light-emitting device

Patent metadata

Field	Value
Publication number	US-10236455-B2
Application number	US-201615223514-A
Country	US
Kind code	B2
Filing date	Jul 29, 2016
Priority date	Jul 31, 2015
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

Abstract

An organic light-emitting device is provided to have high efficiency and long lifespan. The organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; an emission layer disposed between the first electrode and the second electrode and including a host and a dopant; an electron blocking layer disposed between the first electrode and the emission layer; and an electron transport region disposed between the emission layer and the second electrode, in which the electron blocking layer includes a metal halide, a metal oxide, or a combination thereof, and the actually measured lowest unoccupied molecular orbital (LUMO) value of the electron blocking layer is greater than the actually measured LUMO value of the host in the emission layer.

First claim

What is claimed is:

1. An organic light-emitting device comprising:
a first electrode;
a second electrode facing the first electrode;
an emission layer disposed between the first electrode and the second electrode, and comprising a host and a dopant;
an electron blocking layer disposed between the first electrode and the emission layer; and
an electron transport region disposed between the emission layer and the second electrode,
wherein the electron blocking layer comprises a metal halide or a combination of the metal halide and a metal oxide, and an actually measured lowest unoccupied molecular orbital (LUMO) value of the electron blocking layer is greater than an actually measured LUMO value of the host in the emission layer, and
the metal halide is a halide of a metal selected from one of aluminum (Al), scandium (Sc), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), cadmium (Cd), indium (In), tin (Sn), lanthanum (La), hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum (Pt), gold (Au), thallium (Tl), lead (Pb), lanthanoids, actinoids, and any combination thereof.

2. The organic light-emitting device of claim 1 , wherein the electron blocking layer comprises the metal halide or the combination of the metal halide and the metal oxide, and does not comprise organic material.

3. The organic light-emitting device of claim 1 , wherein the metal halide is a halide of a metal selected from the group consisting of Cu, Ag, Au, Cr, Ni, V, lanthanoids, and any combination thereof.

4. The organic light-emitting device of claim 1 , wherein the metal halide is a halide of a metal selected from the group consisting of Cu, Ni, Cr, and any combination thereof.

5. The organic light-emitting device of claim 1 , wherein the metal halide is selected from the group consisting of CuI, CuF, CuF 2 , CuCl, NiF 2 , NiCl 2 , NiI 2 , CrF 2 , CrCl 2 , and any combination thereof.

6. The organic light-emitting device of claim 1 , wherein the metal oxide is selected from
an oxide of a metal selected from the group consisting of Li, Be, Na, Mg, Al, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Cs, Ba, La, Hf, Ta, W, Re, Os, Ir, Pt, Au, Tl, Pb, lanthanoids, and actinoids;
an oxide of a complex metal of at least two selected from the group consisting of Li, Be, Na, Mg, Al, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, antimony (Sb), Cs, Ba, La, Hf, Ta, W, Re, Os, Ir, Pt, Au, Tl, Pb, bismuth (Bi), Polonium (Po), lanthanoids, and actinoids; and
any combination thereof.

7. The organic light-emitting device of claim 1 , wherein the metal oxide is selected from
an oxide of a metal selected from the group consisting of Li, Al, Sn, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Ln, Sr, Y, Sr, Nb, Ba, Ru, Hf, Ta, and
an oxide of a complex metal of at least two selected from the group consisting of Li, Al, Sn, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sr, Y, Zr, Nb, Ba, Ru, Hf, Ta, and Rh; and
any combination thereof.

8. The organic light-emitting device of claim 1 , wherein the metal oxide is selected from
an oxide of a metal selected from the group consisting of Cu, Al, Ni, Zn, and Rh;
an oxide of a complex metal of at least two selected from the group consisting of Cu, Al, Ni, Zn, and Rh; and
any combination thereof.

9. The organic light-emitting device of claim 1 , wherein the metal oxide is selected from the group consisting of ZrO 2 , Li 2 O, Na 2 O, RbO 2 , BeO, CaO, SrO, BaO, SiO 2 , TiO, Ti 2 O 3 , TiO 2 , V 2 O 3 , V 2 O 4 , V 2 O 5 , Mn 3 O 4 , MnO, Mn 2 O 3 , MnO 2 , FeO, Fe 3 O 4 , ZnO, ZnO 2 , MgO, SnO 2 , In 2 O 3 , CrO 3 , CuO, Cu 2 O, HfO 2 , Fe 2 O 3 , CoO, Co 3 O 4 , NiO, NiO 2 , CeO 2 , Y 2 O 3 , NbO, NbO 2 , Nb 2 O 5 , MoO 2 , MoO 3 , RuO 2 , Rh 2 O 3 , RhO 2 , PdO, AgO, Ag 2 O, CdO, Ta 2 O 5 , WO 3 , WO 2 , ReO 3 , OsO 4 , IrO 2 , PtO 2 , Au 2 O 3 , HgO, Ga 2 O 3 , GeO 2 , SnO, PbO 2 , PbO, PbO 4 , Sb 2 O 3 , Sb 2 O 4 , Sb 2 O 5 , Bi 2 O 3 , As 2 O 3 , As 2 O 5 , SeO 2 , Eu 2 O 3 , CuAlO 2 , CuGaO 2 , CuYO 2 , ZnRh 2 O 4 , ZrSiO 4 , RbTiO 3 , RbSeO 3 , LiO 2 , FeMoa t , FeO 3 Ti, Fe 2 O 4 Zn, Fe 2 O 5 Ti, Fe 5 O 12 Y 3 , Fe 12 O 19 Sr, NiFeO 4 , Nb 2 O 6 Pb, NbO 6 Zn, MoO 4 Pb, MoO 4 Sr, MoO 4 Zn, AgOV, AgO 4 Re, Ag 2 CrO 4 , Ag 2 O, Ag 2 O 4 W, CdO 3 Zr, Ga 5 Gd 3 O 12 , TiReO 4 , PbSeO 3 , PbTiO 3 , PbZrO 3 , Bi 2 O 7 Ti 2 , Ce 2 O 12 W 3 , and any combination thereof.

10. The organic light-emitting device of claim 1 , wherein the metal oxide is selected from the group consisting of CuO, Cu 2 O, CuAlO 2 , CuGaO 2 , CuYO 2 , NiO, ZnRh 2 O 4 , and any combination thereof.

11. The organic light-emitting device of claim 1 , wherein a thickness of the electron blocking layer is in a range of about 5 Angstroms (Å) to about 100 Å.

12. The organic light-emitting device of claim 1 , wherein a hole mobility of the electron blocking layer is in a range of about 10 −2 cm 2 /Vs to about 10 2 cm 2 /Vs.

13. The organic light-emitting device of claim 1 , wherein a difference between the actually measured LUMO value of the electron blocking layer and the actually measured LUMO value of the host in the emission layer is in a range of about 0.3 electron volts (eV) to about 2.0 eV.

14. The organic light-emitting device of claim 1 , wherein
the actually measured LUMO value of the electron blocking layer is in a range of about −2.7 eV to about −1.0 eV, and
the actually measured LUMO value of the host in the emission layer is in a range of about −3.0 eV to about −2.0 eV.

15. The organic light-emitting device of claim 1 , wherein an actually measured LUMO value of the dopant is in a range of about −3.2 eV to about −2.2 eV.

16. An organic light-emitting device comprising:
a first electrode;
a second electrode facing the first electrode;
an emission layer disposed between the first electrode and the second electrode, and comprising a host and a dopant;
an electron blocking layer disposed between the first electrode and the emission layer; and
an electron transport region disposed between the emission layer and the second electrode,
wherein the electron blocking layer comprises a metal halide, a metal oxide, or a combination thereof, and an actually measured lowest unoccupied molecular orbital (LUMO) value of the electron blocking layer is greater than an actually measured LUMO value of the host in the emission layer, and
the host is represented by Formula 50 or Formula 51:

wherein, in Formulae 50 and 51,
A 1 is CR 11 or N, A 2 is CR 12 or N, A 3 is CR 13 or N, A 4 is CR 14 or N, A 5 is CR 15 or N, A 6 is CR 16 or N, A 7 is CR 17 or N, A 8 is CR 18 or N, A 9 is CR 19 or N, A 10 is CR 20 or N, A 11 is CR 21 or N, A 12 is CR 22 or N, A 13 is CR 23 or N, A 14 is CR 24 or N, A 15 is CR 25 or N, A 16 is CR 26 or N, A 17 is CR 27 or N, A 18 is CR 28 or N, A 19 is CR 29 or N, A 20 is CR 30 or N, A 21 is CR 31 or N, A 22 is CR 32 or N, A 23 is CR 33 or N, A 24 is CR 34 or N,
B 1 and B 2 rings are each independently selected from a benzene, a pyridine, a pyrimidine, a pyrazine, a naphthalene, a quinoline, an isoquinoline, a quinoxaline, a quinazoline, a cinno

Assignees

• Samsung Display Co Ltd

Inventors

• Han Wonsuk
• Kim Dongchan
• Kim Wonjong
• Kim Eungdo
• Seo Dongkyu
• Lee Jihye
• Im Dahea
• Yim Sanghoon
• Cho Yoonhyeung

Classifications

• H01L51/0067

  Electricity · mapped topic

• C09K2211/1044

  containing two nitrogen atoms as heteroatoms · CPC title

• H01L51/0072

  Electricity · mapped topic

• H01L51/0094

  Electricity · mapped topic

• H01L51/0054

  Electricity · mapped topic