CN102790181A - Lamination transmission type white organic electroluminescent device - Google Patents
Lamination transmission type white organic electroluminescent device Download PDFInfo
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- CN102790181A CN102790181A CN2011101293222A CN201110129322A CN102790181A CN 102790181 A CN102790181 A CN 102790181A CN 2011101293222 A CN2011101293222 A CN 2011101293222A CN 201110129322 A CN201110129322 A CN 201110129322A CN 102790181 A CN102790181 A CN 102790181A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 238000003475 lamination Methods 0.000 title abstract 3
- 238000002347 injection Methods 0.000 claims abstract description 72
- 239000007924 injection Substances 0.000 claims abstract description 72
- 230000000903 blocking effect Effects 0.000 claims description 116
- 239000000463 material Substances 0.000 claims description 81
- 230000005525 hole transport Effects 0.000 claims description 47
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 43
- UEEXRMUCXBPYOV-UHFFFAOYSA-N iridium;2-phenylpyridine Chemical compound [Ir].C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1 UEEXRMUCXBPYOV-UHFFFAOYSA-N 0.000 claims description 30
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 claims description 19
- CECAIMUJVYQLKA-UHFFFAOYSA-N iridium 1-phenylisoquinoline Chemical compound [Ir].C1=CC=CC=C1C1=NC=CC2=CC=CC=C12.C1=CC=CC=C1C1=NC=CC2=CC=CC=C12.C1=CC=CC=C1C1=NC=CC2=CC=CC=C12 CECAIMUJVYQLKA-UHFFFAOYSA-N 0.000 claims description 18
- FJDQFPXHSGXQBY-UHFFFAOYSA-L caesium carbonate Chemical compound [Cs+].[Cs+].[O-]C([O-])=O FJDQFPXHSGXQBY-UHFFFAOYSA-L 0.000 claims description 15
- 239000011521 glass Substances 0.000 claims description 15
- -1 iridium bis (4, 6-difluorophenylpyridine) Chemical compound 0.000 claims description 15
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 12
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- SXWIAEOZZQADEY-UHFFFAOYSA-N 1,3,5-triphenylbenzene Chemical compound C1=CC=CC=C1C1=CC(C=2C=CC=CC=2)=CC(C=2C=CC=CC=2)=C1 SXWIAEOZZQADEY-UHFFFAOYSA-N 0.000 claims description 9
- RKVIAZWOECXCCM-UHFFFAOYSA-N 2-carbazol-9-yl-n,n-diphenylaniline Chemical compound C1=CC=CC=C1N(C=1C(=CC=CC=1)N1C2=CC=CC=C2C2=CC=CC=C21)C1=CC=CC=C1 RKVIAZWOECXCCM-UHFFFAOYSA-N 0.000 claims description 9
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 9
- 239000007983 Tris buffer Substances 0.000 claims description 9
- 229910000024 caesium carbonate Inorganic materials 0.000 claims description 9
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 claims description 9
- YACSIMLPPDISOJ-UHFFFAOYSA-N 4-(4-anilinophenyl)-3-(3-methylphenyl)-n-phenylaniline Chemical compound CC1=CC=CC(C=2C(=CC=C(NC=3C=CC=CC=3)C=2)C=2C=CC(NC=3C=CC=CC=3)=CC=2)=C1 YACSIMLPPDISOJ-UHFFFAOYSA-N 0.000 claims description 8
- QWODREODAXFISP-UHFFFAOYSA-N n-[4-(4-anilinophenyl)phenyl]-n-phenylnaphthalen-1-amine Chemical compound C=1C=C(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C3=CC=CC=C3C=CC=2)C=CC=1NC1=CC=CC=C1 QWODREODAXFISP-UHFFFAOYSA-N 0.000 claims description 7
- DHDHJYNTEFLIHY-UHFFFAOYSA-N 4,7-diphenyl-1,10-phenanthroline Chemical compound C1=CC=CC=C1C1=CC=NC2=C1C=CC1=C(C=3C=CC=CC=3)C=CN=C21 DHDHJYNTEFLIHY-UHFFFAOYSA-N 0.000 claims description 6
- NSPMIYGKQJPBQR-UHFFFAOYSA-N 4H-1,2,4-triazole Chemical class C=1N=CNN=1 NSPMIYGKQJPBQR-UHFFFAOYSA-N 0.000 claims description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 6
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052790 beryllium Inorganic materials 0.000 claims description 6
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 6
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Inorganic materials [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 claims description 6
- MQCHTHJRANYSEJ-UHFFFAOYSA-N n-[(2-chlorophenyl)methyl]-1-(3-methylphenyl)benzimidazole-5-carboxamide Chemical compound CC1=CC=CC(N2C3=CC=C(C=C3N=C2)C(=O)NCC=2C(=CC=CC=2)Cl)=C1 MQCHTHJRANYSEJ-UHFFFAOYSA-N 0.000 claims description 6
- 125000001567 quinoxalinyl group Chemical class N1=C(C=NC2=CC=CC=C12)* 0.000 claims description 6
- MUNFOTHAFHGRIM-UHFFFAOYSA-N 2,5-dinaphthalen-1-yl-1,3,4-oxadiazole Chemical compound C1=CC=C2C(C3=NN=C(O3)C=3C4=CC=CC=C4C=CC=3)=CC=CC2=C1 MUNFOTHAFHGRIM-UHFFFAOYSA-N 0.000 claims description 5
- XJHCXCQVJFPJIK-UHFFFAOYSA-M caesium fluoride Inorganic materials [F-].[Cs+] XJHCXCQVJFPJIK-UHFFFAOYSA-M 0.000 claims description 5
- 239000010931 gold Substances 0.000 claims description 5
- 239000000075 oxide glass Substances 0.000 claims description 5
- 125000001037 p-tolyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)C([H])([H])[H] 0.000 claims description 5
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 5
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 5
- 125000000319 biphenyl-4-yl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 claims description 4
- 125000001637 1-naphthyl group Chemical group [H]C1=C([H])C([H])=C2C(*)=C([H])C([H])=C([H])C2=C1[H] 0.000 claims description 3
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- GENZLHCFIPDZNJ-UHFFFAOYSA-N [In+3].[O-2].[Mg+2] Chemical compound [In+3].[O-2].[Mg+2] GENZLHCFIPDZNJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 3
- AOZVYCYMTUWJHJ-UHFFFAOYSA-K iridium(3+) pyridine-2-carboxylate Chemical compound [Ir+3].[O-]C(=O)C1=CC=CC=N1.[O-]C(=O)C1=CC=CC=N1.[O-]C(=O)C1=CC=CC=N1 AOZVYCYMTUWJHJ-UHFFFAOYSA-K 0.000 claims description 3
- DBNYWRKRZTXMCU-UHFFFAOYSA-N iridium;2-phenylpyridine Chemical compound [Ir].C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1 DBNYWRKRZTXMCU-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- VLRICFVOGGIMKK-UHFFFAOYSA-N pyrazol-1-yloxyboronic acid Chemical compound OB(O)ON1C=CC=N1 VLRICFVOGGIMKK-UHFFFAOYSA-N 0.000 claims description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 3
- 229910001887 tin oxide Inorganic materials 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- MULIMVVSVMFDQR-UHFFFAOYSA-N [Ir].C(C)(=O)CC(C)=O.C1(=CC=CC=C1)C1=NC=CC2=CC=CC=C12.C1(=CC=CC=C1)C1=NC=CC2=CC=CC=C12 Chemical compound [Ir].C(C)(=O)CC(C)=O.C1(=CC=CC=C1)C1=NC=CC2=CC=CC=C12.C1(=CC=CC=C1)C1=NC=CC2=CC=CC=C12 MULIMVVSVMFDQR-UHFFFAOYSA-N 0.000 claims 1
- HLYTZTFNIRBLNA-LNTINUHCSA-K iridium(3+);(z)-4-oxopent-2-en-2-olate Chemical compound [Ir+3].C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O HLYTZTFNIRBLNA-LNTINUHCSA-K 0.000 claims 1
- 125000000040 m-tolyl group Chemical group [H]C1=C([H])C(*)=C([H])C(=C1[H])C([H])([H])[H] 0.000 claims 1
- 230000004888 barrier function Effects 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 400
- ZOKIJILZFXPFTO-UHFFFAOYSA-N 4-methyl-n-[4-[1-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]cyclohexyl]phenyl]-n-(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C1(CCCCC1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 ZOKIJILZFXPFTO-UHFFFAOYSA-N 0.000 description 47
- 238000001704 evaporation Methods 0.000 description 21
- 230000008020 evaporation Effects 0.000 description 20
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 239000002346 layers by function Substances 0.000 description 11
- 238000004020 luminiscence type Methods 0.000 description 10
- 229910052741 iridium Inorganic materials 0.000 description 7
- GMEQIEASMOFEOC-UHFFFAOYSA-N 4-[3,5-bis[4-(4-methoxy-n-(4-methoxyphenyl)anilino)phenyl]phenyl]-n,n-bis(4-methoxyphenyl)aniline Chemical compound C1=CC(OC)=CC=C1N(C=1C=CC(=CC=1)C=1C=C(C=C(C=1)C=1C=CC(=CC=1)N(C=1C=CC(OC)=CC=1)C=1C=CC(OC)=CC=1)C=1C=CC(=CC=1)N(C=1C=CC(OC)=CC=1)C=1C=CC(OC)=CC=1)C1=CC=C(OC)C=C1 GMEQIEASMOFEOC-UHFFFAOYSA-N 0.000 description 6
- CUJRVFIICFDLGR-UHFFFAOYSA-N acetylacetonate Chemical compound CC(=O)[CH-]C(C)=O CUJRVFIICFDLGR-UHFFFAOYSA-N 0.000 description 6
- HRQXKKFGTIWTCA-UHFFFAOYSA-L beryllium;2-pyridin-2-ylphenolate Chemical compound [Be+2].[O-]C1=CC=CC=C1C1=CC=CC=N1.[O-]C1=CC=CC=C1C1=CC=CC=N1 HRQXKKFGTIWTCA-UHFFFAOYSA-L 0.000 description 5
- GEQBRULPNIVQPP-UHFFFAOYSA-N 2-[3,5-bis(1-phenylbenzimidazol-2-yl)phenyl]-1-phenylbenzimidazole Chemical compound C1=CC=CC=C1N1C2=CC=CC=C2N=C1C1=CC(C=2N(C3=CC=CC=C3N=2)C=2C=CC=CC=2)=CC(C=2N(C3=CC=CC=C3N=2)C=2C=CC=CC=2)=C1 GEQBRULPNIVQPP-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000002019 doping agent Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IWZZBBJTIUYDPZ-DVACKJPTSA-N (z)-4-hydroxypent-3-en-2-one;iridium;2-phenylpyridine Chemical compound [Ir].C\C(O)=C\C(C)=O.[C-]1=CC=CC=C1C1=CC=CC=N1.[C-]1=CC=CC=C1C1=CC=CC=N1 IWZZBBJTIUYDPZ-DVACKJPTSA-N 0.000 description 2
- LPCWDYWZIWDTCV-UHFFFAOYSA-N 1-phenylisoquinoline Chemical compound C1=CC=CC=C1C1=NC=CC2=CC=CC=C12 LPCWDYWZIWDTCV-UHFFFAOYSA-N 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- 125000005595 acetylacetonate group Chemical group 0.000 description 2
- GQVWHWAWLPCBHB-UHFFFAOYSA-L beryllium;benzo[h]quinolin-10-olate Chemical compound [Be+2].C1=CC=NC2=C3C([O-])=CC=CC3=CC=C21.C1=CC=NC2=C3C([O-])=CC=CC3=CC=C21 GQVWHWAWLPCBHB-UHFFFAOYSA-L 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005281 excited state Effects 0.000 description 2
- 238000004770 highest occupied molecular orbital Methods 0.000 description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- WTKZEGDFNFYCGP-UHFFFAOYSA-N Pyrazole Chemical compound C=1C=NNC=1 WTKZEGDFNFYCGP-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 235000019557 luminance Nutrition 0.000 description 1
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Abstract
The invention belongs to the field of photoelectronic devices and discloses a lamination transmission type white organic electroluminescent device. The device is of a laminated structure, and the laminated structure sequentially comprises a first light-emitting unit, a charge generating layer and a second light-emitting unit. The first light-emitting unit sequentially comprises a first anode layer, a first hole injection layer, a first hole transmission layer, a first electron barrier layer, a first light-emitting layer and a first hole barrier layer. The second light-emitting unit sequentially comprises a second hole barrier layer, a second light-emitting layer, a second electron barrier layer, a second hole transmission layer, a second hole injection layer and a second anode layer. According to the lamination transmission type white organic electroluminescent device, an n doping layer serves as the charge generating layer to achieve transmission type light emitting and simultaneously serves as a transmission layer for the first light-emitting unit and the second light-emitting unit, the electron transmission capability is improved, the light-emitting efficiency of the device is improved, and the device structure and a preparation process are simplified.
Description
Technical Field
The invention relates to the field of optoelectronic devices, in particular to a laminated transmission type white light organic electroluminescent device.
Background
In 1987, c.w.tang and VanSlyke of Eastman Kodak company, usa, reported a breakthrough development in organic electroluminescence studies. A double-layer organic electroluminescent device (OLED) with high brightness and high efficiency is prepared by using an ultrathin film technology. In the device with the double-layer structure, the brightness reaches 1000cd/m at 10V2The luminous efficiency is 1.51lm/W, and the lifetime is longer than 100 hours.
The principle of light emission of OLEDs is based on the injection of electrons from the cathode into the Lowest Unoccupied Molecular Orbital (LUMO) of the organic substance and holes from the anode into the Highest Occupied Molecular Orbital (HOMO) of the organic substance under the influence of an applied electric field. The electrons and the holes meet and are combined in the luminescent layer to form excitons, the excitons migrate under the action of an electric field to transfer energy to the luminescent material, and the excited electrons are transited from a ground state to an excited state, and the energy of the excited state is inactivated through radiation to generate photons and release light energy.
At present, in order to improve the light emitting brightness and the light emitting efficiency, more and more researches are mainly carried out on a laminated device, the structure generally uses a charge generating layer as a connecting layer to connect a plurality of light emitting units in series, compared with a unit device, the laminated structure device usually has multiplied current efficiency and light emitting brightness, the initial brightness of the laminated OLED is larger, when the laminated OLED is measured under the same current density, the laminated OLED is converted into the initial brightness of the unit device, the stacked device has longer service life, and the laminated device can also easily connect the light emitting units with different colors in series to be mixed into white light, so that the white light emission is realized.
Disclosure of Invention
The invention aims to provide a laminated transmission type white organic light-emitting device which can improve the luminous efficiency and prolong the luminous life.
The technical scheme of the invention is as follows:
a laminated transmission type white organic electroluminescent device is of a laminated structure, and the laminated structure sequentially comprises: a first light emitting unit/charge generation layer/second light emitting unit; wherein,
the first light-emitting unit is a composite layered structure, and the composite layered structure sequentially comprises:
a first anode layer/a first hole injection layer/a first hole transport layer/a first electron blocking layer/a first light emitting layer/a first hole blocking layer;
the second light-emitting unit is also a composite layered structure, and the composite layered structure sequentially comprises:
a second hole blocking layer/a second light emitting layer/a second electron blocking layer/a second hole transport layer/a second hole injection layer/a second anode layer;
the charge generation layer is interposed between the first electron transport layer and the second hole injection layer, and functions as a cathode.
In the above laminated transmissive white organic electroluminescent device:
the first anode layer is made of any one of Indium Tin Oxide (ITO), fluorine-doped tin oxide (FTO), aluminum-doped zinc oxide (AZO) or magnesium-indium oxide glass, and preferably made of ITO; the material of the second anode layer is any one metal of silver, aluminum, platinum or gold, preferably Ag, and the thickness of the second anode layer is 10-50nm, preferably 20 nm;
the materials of the first hole injection layer and the second hole injection layer are both molybdenum trioxide (MoO)3) Tungsten trioxide (WO)3) Vanadium pentoxide (V)2O5) Or copper phthalocyanine (CuPc), preferably MoO3(ii) a The thickness of the first hole injection layer and the first hole injection layer is 20-80nm, and the preferable thickness is 40 nm;
the materials of the first hole transport layer, the second hole transport layer, the first electron blocking layer and the second electron blocking layer are any one of 1, 1-bis [4- [ N, N '-bis (p-tolyl) amino ] phenyl ] cyclohexane (TAPC), N' -bis (3-methylphenyl) -N, N '-diphenyl-4, 4' -biphenyldiamine (TPD), 4 '-tris (carbazol-9-yl) triphenylamine (TCTA), N' - (1-naphthyl) -N, N '-diphenyl-4, 4' -biphenyldiamine (NPB), 1, 3, 5-Triphenylbenzene (TDAPB) or copper phthalocyanine (CuPc); the first hole transport layer and the second hole transport layer are preferably NPB, the thickness of each hole transport layer is 30-80nm, and the preferred thickness of each hole transport layer is 40 nm;
the material of the first luminescent layer is 1, 1-bis [4- [ N, N' -bis (p-tolyl) amino]Phenyl radical]Cyclohexane (TAPC), N ' -bis (3-methylphenyl) -N, N ' -diphenyl-4, 4 ' -biphenyldiamine (TPD)Any one of 4, 4 '-tris (carbazol-9-yl) triphenylamine (TCTA), N' - (1-naphthyl) -N, N '-diphenyl-4, 4' -biphenyldiamine (NPB), 1, 3, 5-Triphenylbenzene (TDAPB) or copper phthalocyanine (CuPc) is doped with a blue-light phosphorescent material; wherein the blue light phosphorescent material is (4, 6-difluorophenylpyridine-N, C)2) Any one of iridium picolinate (FIrpic) and iridium bis (4, 6-difluorophenylpyridine) -tetrakis (1-pyrazolyl) borate (FIr 6); preferably, the material of the first light-emitting layer is TCTA: FIrpic (doped by 10 wt%); the thickness of the first light-emitting layer is 10-30nm, and the preferable thickness is 20 nm;
the material of the second luminescent layer is 1, 1-bis [4- [ N, N' -bis (p-tolyl) amino]Phenyl radical]Any one of cyclohexane (TAPC), N ' -bis (3-methylphenyl) -N, N ' -diphenyl-4, 4 ' -biphenyldiamine (TPD), 4 ', 4 ″ -tris (carbazol-9-yl) triphenylamine (TCTA), N ' - (1-naphthyl) -N, N ' -diphenyl-4, 4 ' -biphenyldiamine (NPB), 1, 3, 5-Triphenylbenzene (TDAPB), or copper phthalocyanine (CuPc) is doped with a red phosphorescent material and/or a green phosphorescent material; wherein the red light phosphorescent material is bis (2-methyl-diphenyl quinoxaline) (acetylacetone) iridium (Ir (MDQ)2(acac)), bis (1-phenylisoquinoline) (acetylacetonato) iridium (Ir (piq))2(acac)) or tris (1-phenyl-isoquinoline) iridium (Ir (piq)3) (ii) a The green phosphorescent material is tris (2-phenylpyridine) iridium (Ir (ppy)3) Bis (2-phenylpyridine) iridium acetylacetonate (Ir (ppy)2(acac)) or bis (2-p-phenoxyphenylpyridine) iridium acetylacetonate ((Oppy)2Any one of Ir (acac)); the material of the second light-emitting layer is preferably TPBi Ir (ppy)3(doped 7 wt%): Ir (piq)3(doping 1 wt%); the thickness of the second light-emitting layer is 5-40nm, preferably 20nm
The materials of the first hole blocking layer and the second hole blocking layer are both 2- (4-biphenyl) -5- (4-tert-butyl) phenyl-1, 3, 4-oxadiazole (PBD) and 8-hydroxyquinoline aluminum (Alq)3) Any of 2, 5-di (1-naphthyl) -1, 3, 4-oxadiazole (BND), 4, 7-diphenyl-1, 10-phenanthroline (Bphen), 1, 2, 4-triazole derivatives (e.g., TAZ), N-arylbenzimidazole (TPBI), or quinoxaline derivatives (TPQ)Seed growing; TPBi is preferably selected as the material of the first hole blocking layer and the second hole blocking layer, the thickness of the first hole blocking layer and the thickness of the second hole blocking layer are 3-10nm, and the preferred thickness is 5 nm; the charge generation layer is made of an electron transport material doped with an electron injection material, namely the electron transport material is taken as a main body; the electron injection layer is Cs2CO3、CsN3、LiF、CsF、Li2O or Li2CO3Any of them, preferably CsN3(ii) a The electron transmission material is a beryllium pyridine complex (Bepp)2) Quinoline beryllium complex (BeBq)2) 2- (4-biphenylyl) -5- (4-tert-butyl) phenyl-1, 3, 4-oxadiazole (PBD), 8-hydroxyquinoline aluminum (Alq)3) Any of 2, 5-di (1-naphthyl) -1, 3, 4-oxadiazole (BND), 4, 7-diphenyl-1, 10-phenanthroline (Bphen), 1, 2, 4-triazole derivatives (e.g., TAZ), N-arylbenzimidazole (TPBI), or quinoxaline derivatives (TPQ); the thickness of the charge generation layer is 20-200 nm.
The laminated transmission type white organic electroluminescent device achieves transmission type luminescence by using the n-doped layer as the charge generation layer, namely the n-doped layer is used as the electron transmission layer of two luminescence units at the same time and is used as the transmission layer of the first luminescence unit and the second luminescence unit at the same time, so that the electron transmission capacity is improved, the luminescence efficiency of the device is improved, and the structure and the preparation process of the device are simplified.
Drawings
FIG. 1 is a schematic structural diagram of a stacked transmission white organic electroluminescent device according to the present invention;
FIG. 2 is a graph of lumen efficiency versus brightness for the stacked transmission white light OLED of example 1 and a reference stacked transmission white light OLED; wherein curve 1 is the lumen efficacy versus brightness curve of example 1, and curve 2 is the lumen efficacy versus brightness curve of the comparative example;
FIG. 3 is a graph of current efficiency versus current density for the stacked transmission white light OLED of example 1 and a reference stacked transmission white light OLED; wherein, curve 1 is the current efficiency versus current density curve of example 1, and curve 2 is the current efficiency versus current density curve of the comparative example.
Detailed Description
The design principle of the laminated transmission type white light organic electroluminescent device provided by the invention is as follows:
a laminated transmission-type white organic electroluminescent device has a laminated structure, as shown in FIG. 1, the laminated structure comprises: first light emitting cell 10/charge generation layer 30/second light emitting cell 20; wherein,
the first light emitting unit 10 is a composite layered structure, and the composite layered structure sequentially comprises:
first anode layer 11/first hole injection layer 12/first hole transport layer 13/first electron blocking layer 14/first light emitting layer 15/first hole blocking layer 16;
the second light emitting unit 20 is also a composite layered structure, which in turn is:
second hole blocking layer 21/second light emitting layer 22/second electron blocking layer 23/second hole transport layer 24/second hole injection layer 25/second anode layer 26;
the charge generation layer 30 is interposed between the first and second hole blocking layers.
In the above laminated transmissive white organic electroluminescent device:
the first anode layer is made of any one of Indium Tin Oxide (ITO), fluorine-doped tin oxide (FTO), aluminum-doped zinc oxide (AZO) or magnesium-indium oxide glass, and preferably made of ITO; the material of the second anode layer is any one metal of silver, aluminum, platinum or gold, preferably Ag, and the thickness of the second anode layer is 10-50nm, preferably 20 nm;
the materials of the first hole injection layer and the first hole injection layer are both molybdenum trioxide (MoO)3) Tungsten trioxide (WO)3) Vanadium pentoxide (V)2O5) Or copper phthalocyanine (CuPc), preferably MoO3(ii) a The thickness of the first hole injection layer and the first hole injection layer is 20-80nm, and the preferable thickness is 40 nm;
the materials of the first hole transport layer, the second hole transport layer, the first electron blocking layer and the second electron blocking layer are any one of 1, 1-bis [4- [ N, N '-bis (p-tolyl) amino ] phenyl ] cyclohexane (TAPC), N' -bis (3-methylphenyl) -N, N '-diphenyl-4, 4' -biphenyldiamine (TPD), 4 '-tris (carbazol-9-yl) triphenylamine (TCTA), N' - (1-naphthyl) -N, N '-diphenyl-4, 4' -biphenyldiamine (NPB), 1, 3, 5-Triphenylbenzene (TDAPB) or copper phthalocyanine (CuPc); the first and second hole transport layers are preferably NPB with the thickness of 30-80nm, preferably 40 nm;
the material of the first luminescent layer is 1, 1-bis [4- [ N, N' -bis (p-tolyl) amino]Phenyl radical]Any one of cyclohexane (TAPC), N ' -bis (3-methylphenyl) -N, N ' -diphenyl-4, 4 ' -biphenyldiamine (TPD), 4 ', 4 ″ -tris (carbazol-9-yl) triphenylamine (TCTA), N ' - (1-naphthyl) -N, N ' -diphenyl-4, 4 ' -biphenyldiamine (NPB), 1, 3, 5-Triphenylbenzene (TDAPB), or copper phthalocyanine (CuPc) is doped with a blue phosphorescent material; wherein the blue light phosphorescent material is (4, 6-difluorophenylpyridine-N, C)2) Any one of iridium picolinate (FIrpic) and iridium bis (4, 6-difluorophenylpyridine) -tetrakis (1-pyrazolyl) borate (FIr 6); preferably, the material of the first light-emitting layer is TCTA: FIrpic (doped by 10 wt%); the thickness of the first light-emitting layer is 10-30 nm; preferably 20nm thick;
the material of the second luminescent layer is 1, 1-bis [4- [ N, N' -bis (p-tolyl) amino]Phenyl radical]Cyclohexane (TAPC), N ' -bis (3-methylphenyl) -N, N ' -diphenyl-4, 4 ' -biphenyldiamine (TPD), 4 ' -tris (carbazol-9-yl) triphenylamine (TCTA), N ' - (1-naphthyl) -N, N ' -diphenyl-4, 4 ' -bi-phenylAny one of phenylenediamine (NPB), 1, 3, 5-Triphenylbenzene (TDAPB) or copper phthalocyanine (CuPc) is doped with a red phosphorescent material and/or a green phosphorescent material; wherein the red light phosphorescent material is bis (2-methyl-diphenyl quinoxaline) (acetylacetone) iridium (Ir (MDQ)2(acac)), bis (1-phenylisoquinoline) (acetylacetonato) iridium (Ir (piq))2(acac)) or tris (1-phenyl-isoquinoline) iridium (Ir (piq)3) (ii) a The green phosphorescent material is tris (2-phenylpyridine) iridium (Ir (ppy)3) Bis (2-phenylpyridine) iridium acetylacetonate (Ir (ppy)2(acac)) or bis (2-p-phenoxyphenylpyridine) iridium acetylacetonate ((Oppy)2Any one of Ir (acac)); the material of the second light-emitting layer is preferably TPBi Ir (ppy)3(doped 7 wt%): Ir (piq)3(doping 1 wt%); the thickness of the second light-emitting layer is 5-40nm, preferably 20nm
The materials of the first hole blocking layer and the second hole blocking layer are both 2- (4-biphenyl) -5- (4-tert-butyl) phenyl-1, 3, 4-oxadiazole (PBD) and 8-hydroxyquinoline aluminum (Alq)3) Any of 2, 5-di (1-naphthyl) -1, 3, 4-oxadiazole (BND), 4, 7-diphenyl-1, 10-phenanthroline (Bphen), 1, 2, 4-triazole derivatives (e.g., TAZ), N-arylbenzimidazole (TPBI), or quinoxaline derivatives (TPQ); TPBi is preferably selected as the material of the first hole blocking layer and the second hole blocking layer, the thickness of the first hole blocking layer and the thickness of the second hole blocking layer are 3-10nm, and the preferred thickness is 5 nm;
the charge generation layer is made of an electron transport material doped with an electron injection material, namely the electron transport material is taken as a main body; the electron injection layer is Cs2CO3、CsN3、LiF、CsF、Li2O or Li2CO3Any of them, preferably CsN3(ii) a The electron transmission material is a beryllium pyridine complex (Bepp)2) Quinoline beryllium complex (BeBq)2) 2- (4-biphenylyl) -5- (4-tert-butyl) phenyl-1, 3, 4-oxadiazole (PBD), 8-hydroxyquinoline aluminum (Alq)3) 2, 5-bis (1-naphthyl) -1, 3, 4-diazole (BND), 4, 7-diphenyl-1, 10-phenanthroline (Bphen), 1, 2, 4-triazole derivatives (e.g. TAZ), N-arylbenzimidazole (TPBI) or quinoxaline derivatives (TPQ)Either one of them; the thickness of the charge generation layer is 20-200 nm.
The preparation method of the organic electroluminescent device comprises the following process flows:
firstly, a first hole injection layer, a first hole transmission layer, a first electron blocking layer, a first light-emitting layer and a first hole blocking layer are sequentially evaporated on a first anode layer to obtain a first light-emitting unit;
then, a charge generation layer playing a role of a cathode is evaporated on the surface of the first hole blocking layer of the first light-emitting unit, the charge generation layer is made of an electron transport material doped with an electron injection material, namely the electron transport material is used as a main body, the doping proportion of the electron injection material is 5-40 wt%, and the thickness of the charge generation layer is 50-200 nm;
and finally, sequentially evaporating a second light-emitting unit consisting of a second hole blocking layer, a second light-emitting layer, a second electron blocking layer, a second hole transmission layer, a second hole injection layer and a second anode layer on the surface of the charge generation layer to obtain the required laminated transmission type white light organic electroluminescent device.
Generally, a stacked organic electroluminescent device adopts two or more materials with hole injection or electron injection as a charge generation layer, or n-type and p-type doped layers as the charge generation layer, but the charge generation layer needs to be processed at least twice, which brings certain complexity to the preparation; the laminated transmission type white organic electroluminescent device achieves transmission type luminescence by using the n-doped layer as the charge generation layer, namely the n-doped layer is used as the electron transmission layer of two luminescence units at the same time and is used as the transmission layer of the first luminescence unit and the second luminescence unit at the same time, so that the electron transmission capacity is improved, the luminescence efficiency of the device is improved, and the structure and the preparation process of the device are simplified.
The preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
In the following embodiments, the substrate is made of glass, the first anode layer is made of ITO, and the substrate and the first anode layer are made of ITO glass, which can be obtained by a commercial method. Therefore, in the following embodiments, the first anode layer ITO layer is not embodied in the first light emitting unit; in practice, the first anode layer of the present invention is an organic functional layer of the first luminescent unit.
Example 1
A laminated transmission type white organic electroluminescent device comprises the following laminated structures in sequence:
glass/ITO/MoO3/NPB/TAPC/TCTA:FIrpic/TPBi/CsN3:Bepp2/TPBi/TPBi:Ir(ppy)3:Ir(piq)3/TAPC/NPB/MoO3/Ag。
Regarding the laminated transmissive white organic electroluminescent device in this embodiment, according to its structure, and by using an evaporation technique, evaporation is sequentially performed on each organic functional layer, i.e., the first light-emitting unit, the charge generation layer, and the second light-emitting unit; wherein,
in the first light-emitting unit, the first hole injection layer, the first hole transport layer, the first electron blocking layer, the first light-emitting layer and the first hole blocking layer are made of MoO respectively3NPB, TAPC, TCTA FIrpic (FIrpic doped 10 wt%), TPBi; and the thicknesses of the first hole injection layer, the first hole transport layer, the first electron blocking layer, the first light emitting layer and the first hole blocking layer are respectively as follows: 40nm, 20nm, 5 nm;
charge generation layer CsN3:Bepp2In the main material is Bepp2The doping material is CsN3The doping proportion is 20 wt%; the thickness of the charge generation layer is 25 nm;
in the second light-emitting unit, the second hole blocking layer, the second light-emitting layer, the second electron blocking layer, the second hole transport layer, the second hole injection layer and the second anode layer are respectively made of TPBi, Ir (ppy)3:Ir(piq)3、TAPC、NPB、MoO3And Ag; wherein, the light emitting layer TPBi:Ir(ppy)3:Ir(piq)3in (m), Ir (ppy)3Doping 7 wt%, Ir (piq)3 Doping 1 wt%; the thicknesses of the second hole injection layer, the second hole transport layer, the second electron blocking layer, the second light-emitting layer, the second hole blocking layer and the second anode layer are respectively as follows: 40nm, 20nm, 5 nm.
Fig. 2 is a positive-n-type charge generation layer-inverted parallel stacked device structure of example 1:
glass/ITO/MoO3/NPB/TAPC/TCTA:FIrpic/TPBi/(CsN3:Bepp2)/TPBi:Ir(ppy)3:Ir(piq)3/Alq3/TAPC/NPB/MoO3Ag and general common positive-p-n charge generation layer-positive series stacked device structure: ITO/MoO3/NPB/TAPC/TCTA:FIrpic/TPBi/(Alq3:Li)/(NPB:FeCl3)/NPB/TAPC/TPBi:Ir(ppy)3:Ir(piq)3Lumen efficiency of/TPBi/PBD/Ag is related to brightness.
As can be seen from FIG. 2, the lumen efficiency of example 1 is greater than that of the comparative example at different luminances (underlight), the maximum lumen efficiency being 8.4lm/W, while that of the comparative example is only 5.2 lm/W.
Fig. 3 is a positive-n-type charge generation layer-inverted parallel stacked device structure of example 1: glass/ITO/MoO3/NPB/TAPC/TCTA:FIrpic/TPBi/CsN3:Bepp2/TPBi/TPBi:Ir(ppy)3:Ir(piq)3/TAPC/NPB/MoO3Ag and general common positive-p-n charge generation layer-positive series stacked device structure: ITO/MoO3/NPB/TAPC/TCTA:FIrpic/TPBi/Alq3:Li/NPB:FeCl3/NPB/TAPC/TPBi:Ir(ppy)3:Ir(piq)3Current efficiency vs. current density for/TPBi/PBD/Ag.
As can be seen from fig. 3, the current efficiencies of the stacked device of example 1 were also higher than those of the conventional stacked device at different current densities, with the maximum current efficiency of example 1 being 9.8cd/a and that of the conventional stacked device being 8.7 cd/a.
Therefore, in this embodiment, when the front-to-back stacked structure is used, since a charge generation layer is used to connect the first light emitting unit and the second light emitting unit in parallel, the resistance is reduced, and the charge generation layer is used as the cathode, the electron transport rate is effectively increased, the exciton recombination probability is increased, and finally the light emitting efficiency of the device is improved.
Example 2
A laminated transmission type white organic electroluminescent device comprises the following laminated structures in sequence:
glass/ITO/MoO3/CuPc/TAPC/TCTA:FIrpic/TPBi/CsN3:Bepp2/TPBi/TPBi:Ir(ppy)3:Ir(piq)3/TAPC/TCTA/MoO3/Ag。
Regarding the laminated transmissive white organic electroluminescent device in this embodiment, according to its structure, and by using an evaporation technique, evaporation is sequentially performed on each organic functional layer, i.e., the first light-emitting unit, the charge generation layer, and the second light-emitting unit; wherein,
in the first light-emitting unit, the first hole injection layer, the first hole transport layer, the first electron blocking layer, the first light-emitting layer and the first hole blocking layer are made of MoO respectively3CuPc, TAPC, TCTA FIrpic (FIrpic doped 10 wt%), TPBi; and the thicknesses of the first anode layer, the first hole injection layer, the first hole transmission layer, the first electron blocking layer, the first light emitting layer and the first hole blocking layer are respectively as follows: 120nm, 20nm, 30nm, 7nm, 20nm, 5 nm;
charge generation layer CsN3:Bepp2In the main material is Bepp2The doping material is CsN3The doping proportion is 10 wt%, and the thickness of the charge generation layer is 20 nm;
in the second light-emitting unit, the second hole blocking layer, the second light-emitting layer, the second electron blocking layer, the second hole transport layer, the second hole injection layer and the second anode layer are respectively made of TPB (thermoplastic vulcanizate)i、TPBi:Ir(ppy)3:Ir(piq)3、TAPC、TCTA、MoO3And Ag; wherein the light emitting layer TPBi is Ir (ppy)3:Ir(piq)3In (m), Ir (ppy)3Doping 7 wt%, Ir (piq)3Doping 1 wt%; the thicknesses of the second hole injection layer, the second hole transport layer, the second electron blocking layer, the second light-emitting layer, the second hole blocking layer and the second anode layer are respectively as follows: 30nm, 40nm, 5nm, 30nm, 7nm, 40 nm.
Example 3
A laminated transmission type white organic electroluminescent device comprises the following laminated structures in sequence:
glass/ITO/WO3/TCTA/TAPC/TCTA:FIrpic/TPBi/Cs2CO3:TPBi/TPBi/TPBi:Ir(ppy)3:Ir(piq)3/TAPC/NPB/WO3/Ag。
Regarding the laminated transmissive white organic electroluminescent device in this embodiment, according to its structure, and by using an evaporation technique, evaporation is sequentially performed on each organic functional layer, i.e., the first light-emitting unit, the charge generation layer, and the second light-emitting unit; wherein,
in the first light-emitting unit, the first hole injection layer, the first hole transport layer, the first electron blocking layer, the first light-emitting layer and the first hole blocking layer are made of WO materials3TCTA, TAPC, TCTA FIrpic (FIrpic doped 10 wt%), TPBi; and the thicknesses of the first anode layer, the first hole injection layer, the first hole transmission layer, the first electron blocking layer, the first light emitting layer and the first hole blocking layer are respectively as follows: 120nm, 30nm, 60nm, 8nm, 20nm, 5 nm;
charge generation layer Cs2CO3In TPBi, the main material is TPBi, and the doped body is Cs2CO3The doping proportion is 20 wt%, and the thickness of the charge generation layer is 40 nm;
in the second light emitting unit, the materials of the second hole blocking layer, the second light emitting layer, the second electron blocking layer, the second hole transport layer, the second hole injection layer and the second anode layerThe substances are TPBi, TPBi Ir (ppy)3:Ir(piq)3、TAPC、NPB、WO3And Ag; wherein the light emitting layer TPBi is Ir (ppy)3:Ir(piq)3In (m), Ir (ppy)3Doping 7 wt%, Ir (piq)3Doping 1 wt%; the thicknesses of the second hole injection layer, the second hole transport layer, the second electron blocking layer, the second light-emitting layer, the second hole blocking layer and the second anode layer are respectively as follows: 40nm, 45nm, 9nm, 35nm, 10nm, 40 nm.
Example 4
A laminated transmission type white organic electroluminescent device comprises the following laminated structures in sequence:
glass/ITO/WO3/TPD/TCTA/TCTA:FIrpic/TPBi /Cs2CO3:Bepp2/TPBi/TPBi:Ir(ppy)3:Ir(piq)3/TAPC/TCTA/WO3/Au。
Regarding the laminated transmissive white organic electroluminescent device in this embodiment, according to its structure, and by using an evaporation technique, evaporation is sequentially performed on each organic functional layer, i.e., the first light-emitting unit, the charge generation layer, and the second light-emitting unit; wherein,
in the first light-emitting unit, the first hole injection layer, the first hole transport layer, the first electron blocking layer, the first light-emitting layer and the first hole blocking layer are made of WO materials3TPD, TCTA FIrpic (FIrpic doped 10 wt%), TPBi; and the thicknesses of the first anode layer, the first hole injection layer, the first hole transmission layer, the first electron blocking layer, the first light emitting layer and the first hole blocking layer are respectively as follows: 120nm, 50nm, 80nm, 10nm, 30nm, 10 nm;
charge generation layer Cs2CO3:Bepp2In the main material is Bepp2The dopant is Cs2CO3The doping proportion is 40 wt%, and the thickness of the charge generation layer is 100 nm;
in the second light emitting unit, a second hole blocking layer, a second light emitting layer, a second electron blocking layer, and a second holeThe material of the transmission layer, the material of the second hole injection layer and the material of the second anode layer are TPBi, TPBi Ir (ppy)3:Ir(piq)3、TAPC、TCTA、WO3And Au; wherein the light emitting layer TPBi is Ir (ppy)3:Ir(piq)3In (m), Ir (ppy)3Doping 7 wt%, Ir (piq)3Doping 1 wt%; the thicknesses of the second hole injection layer, the second hole transport layer, the second electron blocking layer, the second light-emitting layer, the second hole blocking layer and the second anode layer are respectively as follows: 20nm, 35nm, 10nm, 30nm, 9nm, 50 nm.
Example 5
A laminated transmission type white organic electroluminescent device comprises the following laminated structures in sequence:
glass/ITO/V2O5/TCTA/NPB/TCTA:FIrpic/TPBi/Bphen:Li2CO3/TAZ/TPBi:Ir(ppy)3/TCTA/NPB/MoO3/Pt。
Regarding the laminated transmissive white organic electroluminescent device in this embodiment, according to its structure, and by using an evaporation technique, evaporation is sequentially performed on each organic functional layer, i.e., the first light-emitting unit, the charge generation layer, and the second light-emitting unit; wherein,
in the first light-emitting unit, the first hole injection layer, the first hole transport layer, the first electron blocking layer, the first light-emitting layer and the first hole blocking layer are respectively made of V2O5TCTA, NPB, TCTA FIrpic (FIrpic doped 10 wt%), TPBi; and the thicknesses of the first anode layer, the first hole injection layer, the first hole transmission layer, the first electron blocking layer, the first light emitting layer and the first hole blocking layer are respectively as follows: 120nm, 70nm, 60nm, 6nm, 15nm, 10 nm;
charge generation layer Bphen Li2CO3In the formula, the host material is Bphen, and the dopant is Li2CO3The doping proportion is 40 wt%, and the thickness of the charge generation layer is 100 nm;
in the second light emitting unit, a second hole blocking layer, a second light emitting layer, and a second electron resistorThe barrier layer, the second hole transport layer, the second hole injection layer and the second anode layer are respectively made of TAZ, TPBi Ir (ppy)3、TCTA、NPB、MoO3And Pt; wherein the light emitting layer TPBi is Ir (ppy)3In (m), Ir (ppy)3Doping 7 wt%; the thicknesses of the second hole injection layer, the second hole transport layer, the second electron blocking layer, the second light-emitting layer, the second hole blocking layer and the second anode layer are respectively as follows: 25nm, 50nm, 5nm, 10nm, 9nm, 50 nm.
Example 6
A laminated transmission type white organic electroluminescent device comprises the following laminated structures in sequence:
glass/ITO/WO3/TAPC/TCTA/TAPC:FIr6/TPQ /CsN3:BeBq2/TAZ/TPBi:Ir(ppy)3/TAPC/NPB/V2O5/Al。
Regarding the laminated transmissive white organic electroluminescent device in this embodiment, according to its structure, and by using an evaporation technique, evaporation is sequentially performed on each organic functional layer, i.e., the first light-emitting unit, the charge generation layer, and the second light-emitting unit; wherein,
in the first light-emitting unit, the first hole injection layer, the first hole transport layer, the first electron blocking layer, the first light-emitting layer and the first hole blocking layer are made of WO materials3TAPC, TCTA, TAPC FIr6(FIr6 doped with 10 wt%), TPQ; and the thicknesses of the first anode layer, the first hole injection layer, the first hole transmission layer, the first electron blocking layer, the first light emitting layer and the first hole blocking layer are respectively as follows: 120nm, 20nm, 70nm, 7nm, 25nm, 10 nm;
charge generation layer CsN3:BeBq2In, the main material is BeBq2The dopant is CsN3The doping proportion is 40 wt%, the thickness is 60nm,
in the second light-emitting unit, the materials of the second hole blocking layer, the second light-emitting layer, the second electron blocking layer, the second hole transport layer, the second hole injection layer and the second anode layer are divided intoTAZ, a light-emitting layer TPBi Ir (ppy)3、TAPC、NPB、V2O5And Al; wherein the light emitting layer TPBi is Ir (ppy)3In (m), Ir (ppy)3Doping 7 wt%; the thicknesses of the second hole injection layer, the second hole transport layer, the second electron blocking layer, the second light-emitting layer, the second hole blocking layer and the second anode layer are respectively as follows: 25nm, 40nm, 8nm, 12nm, 9nm and 50 nm.
Example 7
A laminated transmission type white organic electroluminescent device comprises the following laminated structures in sequence: glass/ITO/CuPc/TCTA/TAPC/NPB Fir6/PBD/CsF BeBq2/PBD/TAZ:Ir(ppy)3/TAPC/TCTA/CuPc/Al。
Regarding the laminated transmissive white organic electroluminescent device in this embodiment, according to its structure, and by using an evaporation technique, evaporation is sequentially performed on each organic functional layer, i.e., the first light-emitting unit, the charge generation layer, and the second light-emitting unit; wherein,
in the first light-emitting unit, the materials of a first hole injection layer, a first hole transport layer, a first electron blocking layer, a first light-emitting layer and a first hole blocking layer are respectively CuPc, TCTA, TAPC, NPB, FIr6(FIr6 is doped with 10 wt%) and PBD; and the thicknesses of the first anode layer, the first hole injection layer, the first hole transmission layer, the first electron blocking layer, the first light emitting layer and the first hole blocking layer are respectively as follows: 120nm, 35nm, 75nm, 6nm, 22nm, 7 nm;
BeBq charge generation layer CsF2In, the main material is BeBq2The doping body is CsF, the doping proportion is 50 wt%, and the thickness is 200 nm;
in the second light emitting unit, the second hole blocking layer, the second light emitting layer, the second electron blocking layer, the second hole transport layer, the second hole injection layer and the second anode layer are respectively made of PBD and light emitting layer TAZ (Ir) (ppy)3TAPC, TCTA, CuPc and Al; and the second hole injection layer, the second hole transport layer, the second electron blocking layer, the second light-emitting layer, the second hole blocking layer and the second anode layer are thickThe degrees are respectively: 30nm, 40nm, 9nm, 18nm, 9nm, 50 nm.
Example 8
A laminated transmission type white organic electroluminescent device comprises the following laminated structures in sequence: glass/ITO/WO3/NPB/TAPC/TAPC:FIrpic/TPQ/CsN3:PBD/TPQ/PBD:Ir(piq)3/TAPC/NPB/MoO3/Pt。
Regarding the laminated transmissive white organic electroluminescent device in this embodiment, according to its structure, and by using an evaporation technique, evaporation is sequentially performed on each organic functional layer, i.e., the first light-emitting unit, the charge generation layer, and the second light-emitting unit; wherein,
in the first light-emitting unit, the first hole injection layer, the first hole transport layer, the first electron blocking layer, the first light-emitting layer and the first hole blocking layer are made of WO materials3NPB, TAPC, FIrpic (FIrpic doped 10 wt%), TPQ; and the thicknesses of the first anode layer, the first hole injection layer, the first hole transmission layer, the first electron blocking layer, the first light emitting layer and the first hole blocking layer are respectively as follows: 120nm, 40nm, 80nm, 5nm, 22nm, 8 nm;
charge generation layer CsN3In the PBD, the main body material is PBD, and the doping body is CsN3The doping proportion is 50 wt%, and the thickness is 200 nm;
in the second light-emitting unit, the second hole blocking layer, the second light-emitting layer, the second electron blocking layer, the second hole transport layer, the second hole injection layer and the second anode layer are respectively made of TPQ and a light-emitting layer PBDIr (piq)3、TAPC、NPB、MoO3And Pt; wherein the light-emitting layer PBD is Ir (piq)3In (1), Ir (piq)3Doping 1 wt%; the thicknesses of the second hole injection layer, the second hole transport layer, the second electron blocking layer, the second light-emitting layer, the second hole blocking layer and the second anode layer are respectively as follows: 45nm, 75nm, 10nm, 20nm, 9nm and 50 nm.
Example 9
Laminated layerThe transmission white organic electroluminescent device has a layered structure comprising: glass/ITO/MoO3/NPB/TCTA/TAPC:FIrpic/Bphen/CsN3:TAZ/Bphen/TPQ:Ir(ppy)3/TAPC/TCTA/MoO3/Al。
Regarding the laminated transmissive white organic electroluminescent device in this embodiment, according to its structure, and by using an evaporation technique, evaporation is sequentially performed on each organic functional layer, i.e., the first light-emitting unit, the charge generation layer, and the second light-emitting unit; wherein,
in the first light-emitting unit, the first hole injection layer, the first hole transport layer, the first electron blocking layer, the first light-emitting layer and the first hole blocking layer are made of MoO respectively3NPB, TCTA, TAPC FIrpic (FIrpic doped 10 wt%), Bphen; and the thicknesses of the first anode layer, the first hole injection layer, the first hole transmission layer, the first electron blocking layer, the first light emitting layer and the first hole blocking layer are respectively as follows: 120nm, 40nm, 65nm, 7nm, 25nm, 8 nm;
charge generation layer CsN3In the TAZ, the main material is TAZ, and the doping body is CsN3The doping proportion is 50 wt%, and the thickness is 150 nm;
in the second light-emitting unit, the second hole blocking layer, the second light-emitting layer, the second electron blocking layer, the second hole transport layer, the second hole injection layer and the second anode layer are respectively made of Bphen, a light-emitting layer TPQ (ppy)3、TAPC、TCTA、MoO3And Al; wherein the light emitting layer TPQ is Ir (ppy)3In (m), Ir (ppy)3Doping 7 wt%, Ir (piq)3Doping 1 wt%; the thicknesses of the second hole injection layer, the second hole transport layer, the second electron blocking layer, the second light-emitting layer, the second hole blocking layer and the second anode layer are respectively as follows: 20nm, 55nm, 7nm, 40nm, 9nm, 40 nm.
Example 10
A laminated transmission type white organic electroluminescent device comprises the following laminated structures in sequence:
glass/ITO/WO3/NPB/TAPC/TCTA:FIrpic/TPBi/LiF:TAZ/TPBi/TAZ:Ir(ppy)3/TPD/NPB/WO3/Ag。
Regarding the laminated transmissive white organic electroluminescent device in this embodiment, according to its structure, and by using an evaporation technique, evaporation is sequentially performed on each organic functional layer, i.e., the first light-emitting unit, the charge generation layer, and the second light-emitting unit; wherein,
in the first light-emitting unit, the first hole injection layer, the first hole transport layer, the first electron blocking layer, the first light-emitting layer and the first hole blocking layer are made of WO materials3NPB, TAPC, TCTA FIrpic (FIrpic doped 10 wt%), TPBi; and the thicknesses of the first anode layer, the first hole injection layer, the first hole transmission layer, the first electron blocking layer, the first light emitting layer and the first hole blocking layer are respectively as follows: 120nm, 40nm, 65nm, 3nm, 30nm, 3 nm;
in the charge generation layer LiF, TAZ is taken as a main material, LiF is taken as a doping body, the doping proportion is 10 wt%, and the thickness is 120 nm;
in the second light-emitting unit, the second hole blocking layer, the second light-emitting layer, the second electron blocking layer, the second hole transport layer, the second hole injection layer and the second anode layer are respectively made of TPBi, a light-emitting layer TAZ (Ir)3、TPD、NPB、WO3And Ag; wherein the light emitting layer TPBi is Ir (ppy)3In (m), Ir (ppy)37 wt% of doping, wherein the thicknesses of the second hole injection layer, the second hole transport layer, the second electron blocking layer, the second light emitting layer, the second hole blocking layer and the second anode layer are respectively as follows: 25nm, 35nm, 3nm, 40 nm.
It should be understood that the above description is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. A laminated transmission type white organic electroluminescent device is of a laminated structure, and is characterized in that the laminated structure sequentially comprises: a first light emitting unit/charge generation layer/second light emitting unit; wherein,
the first light-emitting unit is a composite layered structure, and the composite layered structure sequentially comprises:
a first anode layer/a first hole injection layer/a first hole transport layer/a first electron blocking layer/a first light emitting layer/a first hole blocking layer;
the second light-emitting unit is also a composite layered structure, and the composite layered structure sequentially comprises:
a second hole blocking layer/a second light emitting layer/a second electron blocking layer/a second hole transport layer/a second hole injection layer/a second anode layer;
the charge generation layer is interposed between the first electron transport layer and the second hole injection layer.
2. The laminated transmissive white-light organic electroluminescent device of claim 1, wherein the first anode layer is made of any one of indium tin oxide glass, fluorine-doped tin oxide glass, aluminum-doped zinc oxide glass, or magnesium-indium oxide glass; the material of the second anode and cathode layer is any one metal of silver, aluminum, platinum or gold.
3. The laminated transmissive white organic electroluminescent device according to claim 1, wherein the first hole injection layer and the second hole injection layer are made of any one of molybdenum trioxide, tungsten trioxide, copper phthalocyanine, and vanadium pentoxide.
4. The laminated transmissive white-light organic electroluminescent device as claimed in claim 1, wherein the first hole transport layer, the second hole transport layer, the first electron blocking layer and the second electron blocking layer are each made of any one of 1, 1-bis [4- [ N, N '-bis (p-tolyl) amino ] phenyl ] cyclohexane, N' -bis (3-methylphenyl) -N, N '-diphenyl-4, 4' -biphenyldiamine, 4 ', 4 "-tris (carbazol-9-yl) triphenylamine, N' - (1-naphthyl) -N, N '-diphenyl-4, 4' -biphenyldiamine, 1, 3, 5-triphenylbenzene or copper phthalocyanine.
5. The stacked transmission white-light organic electroluminescent device according to claim 1, wherein the material of the first light-emitting layer is any one of 1, 1-bis [4- [ N, N '-bis (p-tolyl) amino ] phenyl ] cyclohexane, N' -bis (3-methylphenyl) -N, N '-diphenyl-4, 4' -biphenyldiamine, 4 ', 4 "-tris (carbazol-9-yl) triphenylamine, N' - (1-naphthyl) -N, N '-diphenyl-4, 4' -biphenyldiamine, 1, 3, 5-triphenylbenzene, or copper phthalocyanine doped with phosphorescent blue-light-emitting material; the material of the second light-emitting layer is any one of 1, 1-bis [4- [ N, N '-bis (p-tolyl) amino ] phenyl ] cyclohexane, N' -bis (3-methylphenyl) -N, N '-diphenyl-4, 4' -diphenyldiamine, 4 '-tris (carbazol-9-yl) triphenylamine, N' - (1-naphthyl) -N, N '-diphenyl-4, 4' -diphenyldiamine, 1, 3, 5-triphenylbenzene or copper phthalocyanine doped red phosphorescent material and/or green phosphorescent material.
6. The stacked transmissive white-light OLED as claimed in claim 7, wherein the blue-light phosphorescent material is bis (4, 6-difluorophenylpyridine-N, C)2) Any one of iridium picolinate or iridium bis (4, 6-difluorophenylpyridine) -tetrakis (1-pyrazolyl) borate; the red light phosphorescence luminescent material is any one of bis (2-methyl-diphenyl quinoxaline) (acetylacetone) iridium, bis (1-phenylisoquinoline) (acetylacetone) iridium or tris (1-phenyl-isoquinoline) iridium; the green phosphorescent light-emitting material is any one of tris (2-phenylpyridine) iridium, bis (2-phenylpyridine) iridium acetylacetonate or bis (2-p-phenylpyridine) iridium acetylacetonate.
7. The stacked transmission white organic electroluminescent device according to claim 1, wherein the materials of the first and second hole blocking layers are any one of 2- (4-biphenyl) -5- (4-tert-butyl) phenyl-1, 3, 4-oxadiazole, 8-hydroxyquinoline aluminum, 2, 5-bis (1-naphthyl) -1, 3, 4-oxadiazole, 4, 7-diphenyl-1, 10-phenanthroline, 1, 2, 4-triazole derivative, N-arylbenzimidazole or quinoxaline derivative.
8. The stacked transmissive white-light organic electroluminescent device of claim 1, wherein the charge generation layer is formed by doping an electron injection material with an electron transport material.
9. The stacked transmissive white-light OLED device as claimed in claim 8, wherein the electron injecting material is Cs2CO3、CsN3、LiF、CsF、Li2O or Li2CO3Any one of the above.
10. The stacked-layer transmissive white-light organic electroluminescent device according to claim 8 or 9, wherein the electron transport material is any one of a beryllium pyridine complex, a beryllium quinoline complex, 2- (4-biphenyl) -5- (4-tert-butyl) phenyl-1, 3, 4-oxadiazole, 8-hydroxyquinoline aluminum, 2, 5-bis (1-naphthyl) -1, 3, 4-oxadiazole, 4, 7-diphenyl-1, 10-phenanthroline, a 1, 2, 4-triazole derivative, N-arylbenzimidazole, or quinoxaline derivative.
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