CN107123749B - A kind of high color rendering index (CRI) white light organic electroluminescent device and preparation method thereof - Google Patents
A kind of high color rendering index (CRI) white light organic electroluminescent device and preparation method thereof Download PDFInfo
- Publication number
- CN107123749B CN107123749B CN201710217788.5A CN201710217788A CN107123749B CN 107123749 B CN107123749 B CN 107123749B CN 201710217788 A CN201710217788 A CN 201710217788A CN 107123749 B CN107123749 B CN 107123749B
- Authority
- CN
- China
- Prior art keywords
- layer
- blue
- white light
- main part
- hole transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/654—Aromatic compounds comprising a hetero atom comprising only nitrogen as heteroatom
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/655—Aromatic compounds comprising a hetero atom comprising only sulfur as heteroatom
Abstract
The invention discloses a kind of high color rendering index (CRI) white light organic electroluminescent devices and preparation method thereof, the device successively includes substrate, anode layer, organic function layer and cathode layer from the bottom to top, the organic function layer successively includes hole transmission layer, blue light-emitting layer and electron transfer layer from the bottom to top, blue light-emitting layer is made of one of following two mode: the host-guest system structure 1. formed by material of main part doped, blue fluorescence luminescent material, and the doping mass ratio of the blue-fluorescence luminescent material is 1%~20%；2. the undoped structure formed by the single layer material of main part close to hole transmission layer and the single layer blue-fluorescence luminescent material close to electron transfer layer.The present invention only generates blue light using a kind of blue-fluorescence luminescent material, the orange light and feux rouges that electroluminescent excimer generates are formed in conjunction with hole transmission layer and material of main part, realize the white-light emitting of high color rendering index (CRI), simplify device architecture and preparation process simultaneously, reduce production cost and improves device spectral stability.
Description
Technical field
The present invention relates to the organic photoelectric technical fields in electronic component, and in particular to a kind of high color rendering index (CRI) white light has
Organic electroluminescence devices and preparation method thereof.
Background technique
White light organic electroluminescent device (Organic light-emitting devices, OLEDs) is a kind of novel
The each neck for the daily productions and life such as display technology, is widely used in FPD, and solid-state lighting and flexible and transparent are shown
Domain, can satisfy instantly the whole world to energy saving, the requirement of low-carbon environment-friendly and green living.Colour rendering index is light source manifestation
One evaluation index of matter intrinsic colour ability, colour rendering index show that the colour rendering of light source is better closer to 100.OLED device
In, in order to realize white light, usually using the two kinds of luminescent dyes or red, green, blue three of blue, yellow (or blue, orange) complementary colours principle
Three kinds of luminescent dyes of primary colours principle.And in order to realize the white light parts of high color rendering index (CRI), need to mix red, green, yellow, Lan Si kind
The luminescent material of luminescent dye or more difference luminescent color.
First generation OLED luminescent material be organic fluorescence materials, can only be carried out using 25% singlet exciton it is luminous, and
75% triplet excitons are inactivated with unirradiated form, therefore theoretical luminous efficiency is lower.Second generation OLED luminescent material is gold
Metal complex phosphor material enhances Quantum geometrical phase by introducing such as iridium (Ir) and platinum (Pt) rare precious metals, realizes single
Line state and triplet state be between alter jump, be utilized 25% singlet exciton and 75% triplet excitons carry out it is luminous, it is theoretical
On 100% exciton utilization rate may be implemented, and be widely used.But there is also the blue phosphor materials service life is short at present
Bottleneck problem hinders its market development.It is glimmering that the Adachi et al. of Kyushu University in 2012 reports a kind of hot activation delay
Light (Thermally activated delayed fluorescence, TADF) material, the singlet of this material molecule and
The energy level difference very little of triplet state, triplet state can be occurred at normal temperature by causing jumps to anti-channeling between the Department of Electronics of singlet, to manage
By it is upper can also reach 100% exciton utilization rate, become third generation OLED luminescent material more popular at present.It is especially blue
TADF luminescent material has very high luminous efficiency, is expected to solve the problems, such as blue phosphor materials short life.Conventional luminescent dye
Due to being easy to happen quenching effect in the collected state, so that shining reduces, it is therefore desirable to use physical doping method, form master
Object structure reduces the concentration of luminescent material, overcomes the problems, such as to assemble luminescence queenching.Therefore, in usual white light OLED device, be by
Multiple luminescent dyes are entrained in formation single light-emitting layer structure in material of main part, or every kind of luminescent material is entrained in phase respectively
Multilayer luminous layer structure is formed in same or different subjects, realizes high-performance luminescent device.However, this also brings problems,
Such as the low-doped ratio of multiple luminescent materials (the especially feux rouges of low energy, orange light and Yellow light emitting material) is difficult to accurately control
System, spectrum stability is not high, and preparation process is complicated, and production cost is higher etc..For example, Jou et al. is to improve colour rendering index, he
Be entrained in a kind of material of main part using three kinds of red, green, yellow phosphorescent light-emitting materials, while using blue, two kinds of green fluorescence
Luminescent material is entrained in another main body, and the white light parts of double emitting layers structure are prepared in conjunction with five kinds of luminescent materials, although colour developing
Index reaches 93 [J.Mater.Chem.2011,21,18523], but device architecture and preparation process are extremely complex, repeatability
It is not high.Therefore, by device structure design, in conjunction with novel, efficient luminescent material, to prepare simple structure, high color rendering index (CRI)
White light OLED provide an important research direction.
In OLED device structure, hole mobile material can reduce injection barrier of the hole from anode to luminescent layer, and
By hole transport to luminescent layer, hole mobile material is usually aromatic diamines compound or aromatic triamine class compound
Or star triphenylamine compound.Wherein, with the hole mobile material TAPC of trianilino group, due to the work of trianilino group
With the wave crest of generation 580nm in the electroluminescent spectrum of electric field action TAPC belongs to electroluminescent excimer and shines
[Appl.Phys.Lett.2000,76,2352].Similar, the carbazole compound as material of main part is under electric field action
Also electroluminescent excimer can be generated, and obtains different luminescence peaks.Since the luminous efficiency of usual excimer is lower,
The concern of scholars is not caused by the luminous research for preparing white light OLED of excimer, relevant report is rare.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide a kind of high color rendering index (CRI) white light organic electroluminescence devices
Part will using novel, function admirable, inexpensive blue-fluorescence luminescent material as the luminescent material in organic layer
This blue-fluorescence luminescent material, which is entrained in material of main part, to be formed blu-ray layer or forms blu-ray layer with undoped structure, in conjunction with sky
Cave transport layer and material of main part form the orange light and feux rouges that electroluminescent excimer generates, and realize white-light emitting.By only utilizing
A kind of blue-fluorescence luminescent material and simple device architecture realize the white light parts of high color rendering index (CRI), while can reduce life
It produces cost and improves device spectral stability.
It is a further object to provide the preparation methods of above-mentioned high color rendering index (CRI) white light organic electroluminescent device.
Technical problem proposed by the invention solves in this way: a kind of high color rendering index (CRI) white light organic electroluminescence device
Part, from the bottom to top successively include substrate, anode layer, organic function layer and cathode layer, it is characterised in that: the organic function layer by
Under it is supreme successively include hole transmission layer, blue light-emitting layer and electron transfer layer, the blue light-emitting layer is by following two mode
One of constitute: the host-guest system structure 1. formed by material of main part doped, blue fluorescence luminescent material, the blue-fluorescence are sent out
The doping mass ratio of luminescent material be 1%~20%, the blue light-emitting layer with a thickness of 10nm~30nm；2. by being passed close to hole
The undoped structure of the single layer material of main part of defeated layer and the single layer blue-fluorescence luminescent material formation close to electron transfer layer, it is described
Material of main part with a thickness of 5nm~10nm.
A kind of preparation method of white light organic electroluminescent device comprising following steps:
1. being cleaned by ultrasonic to substrate, it is put into baking oven after cleaning and is dried；
2. substrate is moved into vacuum film coating chamber, according to sequence from bottom to up, is prepared by dry or wet, successively divided
Anode layer, hole transmission layer, blue light-emitting layer, electron transfer layer and cathode layer are not prepared, and white light organic electroluminescence device is made
Part；
3. the white light organic electroluminescent device that preparation is completed is packaged in nitrogen atmosphere.
Material according to the present invention is the excellent organic semiconducting materials of traditional performance, and the range of choice of material is wide, makes
With the blue-fluorescence luminescent material of TADF characteristic, difference is respectively generated in conjunction with device structure hollow hole transport materials and material of main part
Electroluminescent excimer luminescence peak, realize the white light parts of high color rendering index (CRI), thus, utilize least luminescent material obtain
White light parts.In addition, this device allows blue light-emitting layer to prepare blu-ray layer using undoped structure, operative employee can be simplified
Skill avoids uncontrollable host-guest system technological problems.Device of the present invention has colour rendering index high, and structure is simple, stability
Good, luminous efficiency height, the advantages such as preparation process is simple and production cost is low, the angle prepared from material technology and device are opened up
One approach to show unique characteristics.
Detailed description of the invention
Fig. 1 is the knot of high color rendering index (CRI) white light organic electroluminescent device provided by the present invention and embodiment 1,2,3
Structure schematic diagram；
Fig. 2 is the structural schematic diagram of embodiment 4,5,6 provided by the present invention；
Fig. 3 is electroluminescent spectrum of the device under different voltages in embodiment 1 provided by the present invention, wherein solid
Rectangular curve represents the electroluminescent spectrum under 14V voltage, and hollow circular curve represents the electroluminescent spectrum under 15V voltage,
Abscissa Wavelength indicates that wavelength, unit nm, ordinate Normalized EL intensity indicate normalized electroluminescent
Luminous intensity.
Wherein, substrate 1, anode layer 2, hole transmission layer 3, material of main part 4, blue-fluorescence luminescent material 5, electron transfer layer
6, cathode layer 7, additional power source 8.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings:
As shown, a kind of high color rendering index (CRI) white light organic electroluminescent device of the invention, successively includes from the bottom to top
Substrate 1, anode layer 2, organic function layer and cathode layer 7.Under organic function layer alive driving outside shine, from the bottom to top according to
Secondary includes hole transmission layer 3, blue light-emitting layer and electron transfer layer 6.The blue light-emitting layer can by following two mode it
One is constituted: the host-guest system structure 1. formed by 4 doped, blue fluorescence luminescent material 5 of material of main part, the blue-fluorescence hair
The doping mass ratio of luminescent material 5 be 1%~20%, the blue light-emitting layer with a thickness of 10nm~30nm；2. by close to hole
The undoped knot of the single layer material of main part 4 of transmitting layer 3 and the formation of single layer blue-fluorescence luminescent material 5 close to electron transfer layer 6
Structure, the material of main part with a thickness of 5nm~10nm.The blue-fluorescence luminescent material for having both TADF characteristic is a kind of pure organic point
Son is free of rare precious metals, is the ideal choosing for realizing blue-light-emitting there are also stability height, synthesis feature simple, at low cost
It selects.Therefore, by the orange light and feux rouges that are generated using excimer, in conjunction with the blue light that blue-fluorescence luminescent material generates, no
The only white-light emitting of available high color rendering index (CRI), while the number of luminescent material can be reduced, simplify device architecture and preparation
Technique also advantageously improves spectrum stability and reduces production cost.
Preferably, the hole transmission layer uses and is capable of forming electroluminescent excimer under voltage driving, and
560nm~590nm orange light region generates the material of a luminescence peak, for example, aromatic triamine class compound or star triphen
One or more of aminated compounds mixing, it is furthermore preferred that aromatic triamine class compound is two-[4- (N, N- connection first
Benzene-amino)-phenyl] hexamethylene (TAPC), star triphenylamine compound be selected from molecular center contain phenyl (TDAB series),
One kind or two of the star triphenylamine compound of triphenylamine (PTDATA series) or 1,3,5- triphenylbenzene (TDAPB series)
Kind or more mixing.
The material of main part uses and is capable of forming electroluminescent excimer under high voltages, and red in 590nm~650nm
Light region generates the material of a luminescence peak.Such as carbazole compound, it is furthermore preferred that carbazole compound is 1,3- bis-
(carbazole -9-yl) benzene (MCP), 4,4 ', 4 "-three (carbazole -9-yl) triphenylamines (TCTA) or 4,4 '-two (carbazole -9-yl) connection
Benzene (CBP), 3,3- bis- (9H- carbazole -9-yl) biphenyl (mCBP), 2,2 '-two (4- carbazole phenyls) -1,1 '-hexichol (4CzPBP),
One or more kinds of mixing of polyvinylcarbazole (PVK).
Preferably, blue-fluorescence luminescent material including conventional small organic molecule blue-fluorescence luminescent material or has hot activation
The blue-fluorescence luminescent material of delayed fluorescence characteristic.Molecule knot with hot activation delayed fluorescence characteristic blue fluorescence luminescent material
It include electronic donor group and electron accepting groups in structure, electronic donor group includes carbazole group series, acridine group series
Or the mixing of one or more of trianilino group series, electron accepting groups include benzene dicarbonitrile group series, three
Benzene triazine group series, phenyl phosphine oxide group series, phenoxathiin oxidized series, thioxanthone group series or diphenyl sulphone (DPS)
The mixing of one or more of group series.
Preferably, material used in electron transfer layer is metal complex, furodiazole compound, quinoxaline chemical combination
Object, nitrogen-containing heterocycle compound, phosphine oxo-compound, anthracene compound, organosilicon material, organic boron material or organo-sulfur materials
One or more of.Wherein, metal complex can be 8-hydroxyquinoline aluminium (Alq3), bis- (2- methyl -8- hydroxyl quinolines
Quinoline) (p-phenyl phenol) aluminium (BAlq), 8-hydroxyquinoline lithium (Liq), bis- (10- hydroxy benzo [h] quinoline) beryllium (Bebq2) or
Bis- [2- (2- hydroxy phenyl -1)-pyridine] beryllium (Bepp2).Furodiazole compound can be 2- (4- diphenyl) -5- (tertiary fourth of 4-
Phenyl) -1,3,4- oxadiazoles 18 (PBD) or 1,3- bis- [2- (4- tert-butylbenzene) -1,3,4- oxadiazoles -5-yl] benzene (OXD-
7).Nitrogen-containing heterocycle compound can be 1,3,5- (three N- phenyl -2- benzimidazolyl-2 radicals) benzene 41 (TPBI), phenylbenzene -1 4,7-,
10- phenanthrolene (Bphen), 2,9- dimethyl -4,7- phenylbenzene -1,10- phenanthrolene (BCP), 3- (4- hexichol) -4-
Benzene -5- tert-butylbenzene -1,2,4- benzotriazole (TAZ), 3,5,3 ", 5 "-four -3- pyridines-[1,1 '；3 ', 1 "] terphenyl
(B3PyPB), 3- (diphenylphosphoric acid chlorine) -9- benzene -9H- carbazole (PPO1) or bis- (diphenylphosphoric acid the chlorine) -9- benzene -9H- clicks of 3,6-
Azoles (PPO2).Phosphine oxo-compound can be two (2- (diphenylphosphino) benzene) bis- (diformazans of ether oxygen compound (DPEPO) or 2,8-
Benzenephosphonic acid) dibenzothiophen (PO15).Anthracene compound can be 9,10- bis--(2- naphthalene) anthracene (AND).Organic boron material can be three
(2,4,6- trimethyl -3- (pyridine -3-yl) benzene) borine (3TPYMB).Organo-sulfur materials can be 2,8- bis- (diformazan benzenephosphonic acid)
Dibenzothiophen (PO15) etc..
Substrate 1 is the support of electrode and organic thin film layer, it has good light transmission in visible light region, is had certain
Anti-steam and oxygen infiltration ability, have preferable profile pattern, it can be glass or flexible substrate, and flexible substrate is adopted
With one of polyesters, poly- phthalimide compound material or relatively thin metal.
Articulamentum of the anode layer 2 as white light organic electroluminescent device forward voltage, it requires have preferable electric conductivity
Energy, visible transparent and higher work function.It generallys use inorganic, metal oxide (such as tin indium oxide ITO), organic lead
The metal material of electric polymer (such as PEDOT:PSS) or high work function (such as gold, copper, silver, platinum).
Articulamentum of the cathode layer 7 as device negative voltage, it requires preferable electric conductivity and lower work content
Number, cathode be usually the lower metal of the work functions such as low workfunction metal material lithium, magnesium, calcium, strontium, aluminium, indium or they and copper,
The alloy of gold, silver；Or one layer very thin buffer insulation layer (such as LiF, MgF2) and metal or alloy noted earlier.
The preparation method of above-mentioned white light organic electroluminescent device comprising following steps:
1. successively being put after cleaning using going detergent, deionized water, acetone and ethanol solution to be cleaned by ultrasonic substrate
Enter baking oven to be dried.
2. substrate is moved into vacuum film coating chamber, according to sequence from bottom to up, is prepared by dry or wet, successively divided
Anode layer, hole transmission layer, blue light-emitting layer, electron transfer layer and cathode layer are not prepared, and white light organic electroluminescence device is made
Part.The directly successively dry process of anode layer, hole transmission layer, blue light-emitting layer, electron transfer layer and cathode layer, or by having
It is sequentially prepared by wet processing on substrate after solvent dilution, such as technique can be used and be；Vacuum evaporation, ion cluster beam are heavy
Product, ion plating, DC sputtering deposition, radio-frequency sputtering plated film, ion beam sputtering deposition, ion beam assisted depositing, plasma enhancing
Chemical vapor deposition, high density inductive coupling plasma source chemical vapor deposition, catalyst chemical vapor deposition, magnetic control splash
Penetrate, be electroplated, spin coating, dip-coating, inkjet printing, roller coating, one of LB film or several ways and formed, the technique of each layer can phase
It is same or different.
3. the white light organic electroluminescent device that preparation is completed is packaged in glove box, glove box is nitrogen atmosphere.
It is as follows using organic electro-optic device structure example prepared by the present invention:
Glass/ITO/ hole transmission layer/material of main part layer/blue phosphor luminous material layer/electron transfer layer/cathode layer
Glass/ITO/ hole transmission layer/material of main part adulterates blue phosphor luminous material layer/electron transfer layer/cathode layer
Flexible substrate/ITO/ hole transmission layer/material of main part layer/blue phosphor luminous material layer/electron transfer layer/cathode
Layer
Flexible substrate/ITO/ hole transmission layer/material of main part adulterates blue phosphor luminous material layer/electron transfer layer/yin
Pole layer
Embodiment 1
As shown in Figure 1, the hole transmission layer 3 in device architecture is TAPC, material of main part 4 is MCP in blue light-emitting layer, blue
Light fluorescence luminescent material 5 is blue-fluorescence luminescent material DMACDPS (the wherein electron donor with hot activation delayed fluorescence characteristic
Group is acridine series 9,9-dimethyl-9, and 10-dihydroacridine (DMAC), electron accepting groups are diphenyl sulphone (DPS) systems
Arrange Diphenylsulphone (DPS)), doping mass ratio is guest materials: material of main part=10%, used in electron transfer layer 6
Material is TPBi, and cathode layer is Mg:Ag alloy, ratio 10:1.Entire device architecture description are as follows:
Glass substrate/ITO/TAPC (40nm)/MCP:10%DMACDPS (20nm)/TPBi (40nm)/Mg:Ag (10:1,
200nm)
The preparation method is as follows:
(1) ultrasound is carried out to transparent conduction base sheet ito glass with detergent, deionized water, acetone and ethanol solution respectively
Cleaning, is put into oven after cleaning and is dried.Wherein anode layer of the ito film above glass substrate as device, the side of ito film
Block resistance is 10 Ω/sq, film thickness 150nm.
(2) substrate after drying is moved into vacuum chamber, oxygen is carried out to ito glass in the case where air pressure is the oxygen pressure ring border of 10Pa
Plasma pretreatment 15 minutes.
(3) by treated, transparent substrates are passed to high vacuum organic vapor deposition room, are successively deposited according to sequence from bottom to up
Each organic function layer, including hole transmission layer, blue light-emitting, electron transfer layer and cathode layer, air pressure are 4 × 10-3Pa or less.
Wherein, the evaporation rate of hole transmission layer TAPC and electron transfer layer TPBi are 1nm/s, material of main part in blue light-emitting
The evaporation rate of MCP is 2nm/s, and the evaporation rate of guest materials DMACDPS is 0.02nm/s, and cathode layer Mg:Ag ratio is 10:
1, the rate that magnesium is deposited is 10nm/s, and the rate that silver is deposited is 1nm/s, evaporation rate and thickness by the film that is mounted near substrate
Thick instrument monitoring.
(4) device that preparation is completed is transmitted to the glove box filled with nitrogen to be packaged, and the photoelectricity for testing device is special
The electroluminescent spectrum of property and device.Table 1 is electroluminescent spectrum performance of the device under 14V and 15V voltage in the present embodiment 1
Parameter.
Table 1
Embodiment 2
As shown in Figure 1, the hole transmission layer 3 in device architecture is TAPC, material of main part 4 is MCP in blue light-emitting layer, blue
Light fluorescence luminescent material 5 is blue-fluorescence luminescent material DMACDPS (the wherein electron donor with hot activation delayed fluorescence characteristic
Group is acridine series 9,9-dimethyl-9, and 10-dihydroacridine (DMAC), electron accepting groups are diphenyl sulphone (DPS) systems
Arrange Diphenylsulphone (DPS)), doping mass ratio is guest materials: material of main part=20%, used in electron transfer layer 6
Material is TPBi, and cathode layer is Mg:Ag alloy, ratio 10:1.Entire device architecture description are as follows:
Glass substrate/ITO/TAPC (60nm)/MCP:20%DMACDPS (20nm)/TPBi (40nm)/Mg:Ag (10:1,
200nm)
The preparation step of device is similar to Example 1.
Embodiment 3
As shown in Figure 1, the hole transmission layer 3 in device architecture is TAPC, material of main part 4 is MCP in blue light-emitting layer, blue
Light fluorescence luminescent material 5 is blue-fluorescence luminescent material DMACDPS (the wherein electron donor with hot activation delayed fluorescence characteristic
Group is acridine series 9,9-dimethyl-9, and 10-dihydroacridine (DMAC), electron accepting groups are diphenyl sulphone (DPS) systems
Arrange Diphenylsulphone (DPS)), doping mass ratio is guest materials: material of main part=1%, material used in electron transfer layer 6
Material is Bphen, and cathode layer is Mg:Ag alloy, ratio 10:1.Entire device architecture description are as follows:
Glass substrate/ITO/TAPC (30nm)/MCP:1%DMACDPS (20nm)/Bphen (40nm)/Mg:Ag (10:1,
200nm)
The preparation step of device is similar to Example 1.
Embodiment 4
As shown in Fig. 2, the hole transmission layer 3 in device architecture is TAPC, material of main part 4 is MCP, the thickness of material of main part
For 10nm, blue-fluorescence luminescent material 5 is blue-fluorescence luminescent material DMACDPS (its with hot activation delayed fluorescence characteristic
Middle electronic donor group is acridine series 9,9-dimethyl-9,10-dihydroacridine (DMAC), electron accepting groups
It is diphenyl sulphone (DPS) series Diphenylsulphone (DPS)), 6 material therefor of electron transfer layer is DPEPO, and cathode layer is Mg:Ag conjunction
Gold, ratio 10:1.Entire device architecture description are as follows:
Glass substrate/ITO/TAPC (40nm)/MCP (10nm)/DMACDPS (15nm)/DPEPO (40nm)/Mg:Ag (10:
1,200nm)
The preparation step of device is similar to Example 1.
Embodiment 5
As shown in Fig. 2, the hole transmission layer 3 in device architecture is TAPC, material of main part 4 is MCP, the thickness of material of main part
For 5nm, blue-fluorescence luminescent material 5 be the blue-fluorescence luminescent material DMACDPS with hot activation delayed fluorescence characteristic (wherein
Electronic donor group is acridine series 9,9-dimethyl-9,10-dihydroacridine (DMAC), and electron accepting groups are
Diphenyl sulphone (DPS) series Diphenylsulphone (DPS)), 6 material therefor of electron transfer layer is TPBi, and cathode layer is Mg:Ag alloy,
Ratio is 10:1.Entire device architecture description are as follows:
Glass substrate/ITO/TAPC (30nm)/MCP (5nm)/DMACDPS (10nm)/TPBi (40nm)/Mg:Ag (10:1,
200nm)
The preparation step of device is similar to Example 1.
Embodiment 6
As shown in Fig. 2, the hole transmission layer 3 in device architecture is TAPC, material of main part 4 is MCP, the thickness of material of main part
For 8nm, blue-fluorescence luminescent material 5 be the blue-fluorescence luminescent material DMACDPS with hot activation delayed fluorescence characteristic (wherein
Electronic donor group is acridine series 9,9-dimethyl-9,10-dihydroacridine (DMAC), and electron accepting groups are
Diphenyl sulphone (DPS) series Diphenylsulphone (DPS)), 6 material therefor of electron transfer layer is DPEPO, and cathode layer is Mg:Ag conjunction
Gold, ratio 10:1.Entire device architecture description are as follows:
Glass substrate/ITO/TAPC (30nm)/MCP (8nm)/DMACDPS (20nm)/DPEPO (40nm)/Mg:Ag (10:
1,200nm)
The preparation step of device is similar to Example 1.
Claims (5)
1. a kind of high color rendering index (CRI) white light organic electroluminescent device successively includes substrate, anode layer, organic functions from the bottom to top
Layer and cathode layer, it is characterised in that: the organic function layer successively includes hole transmission layer, blue light-emitting layer and electricity from the bottom to top
Sub- transport layer, the blue light-emitting layer are made of one of following two mode: 1. by material of main part doped, blue fluorescence radiation material
Expect the host-guest system structure that DMACDPS is formed, the doping mass ratio of the blue-fluorescence luminescent material is 1%~20%, institute
State blue light-emitting layer with a thickness of 10nm~30nm；2. by the single layer material of main part close to hole transmission layer and close to electron-transport
Layer single layer blue-fluorescence luminescent material DMACDPS formed undoped structure, the material of main part with a thickness of 5nm~
10nm；The hole transmission layer uses two-[4- (N, N- ditolyl-amino)-phenyl] hexamethylenes, can under voltage driving
Electroluminescent excimer is formed, and generates a luminescence peak in 560nm~590nm orange light region；The material of main part is adopted
With 1,3- bis- (carbazole -9-yl) benzene, it is capable of forming electroluminescent excimer under high voltages, and in 590nm~650nm feux rouges
Region generates a luminescence peak.
2. high color rendering index (CRI) white light organic electroluminescent device according to claim 1, it is characterised in that: the electronics passes
The material that defeated layer uses is metal complex, furodiazole compound, quinoxaline compound, nitrogen-containing heterocycle compound, phosphine oxygen
One or more of based compound, anthracene compound, organosilicon material, organic boron material or organo-sulfur materials.
3. high color rendering index (CRI) white light organic electroluminescent device according to claim 2, it is characterised in that: the metal
Complex is 8-hydroxyquinoline aluminium, bis- (2- methyl -8-hydroxyquinoline) (p-phenyl phenol) aluminium, 8-hydroxyquinoline lithium, bis- (10-
Hydroxy benzo [h] quinoline) beryllium or bis- [2- (2- hydroxy phenyl -1)-pyridine] berylliums, furodiazole compound is 2- (4- hexichol
Base) -5- (4- 2-methyl-2-phenylpropane base) -1,3,4- oxadiazoles 18 or 1,3- bis- [2- (4- tert-butylbenzene) -1,3,4- oxadiazoles -5-yl]
Benzene, nitrogen-containing heterocycle compound 1,3,5- (three N- phenyl -2- benzimidazolyl-2 radicals) benzene 41,4,7- phenylbenzene -1,10- neighbour's diaza
Phenanthrene, 2,9- dimethyl -4,7- phenylbenzene -1,10- phenanthrolene, 3- (4- hexichol) -4- benzene -5- tert-butylbenzene -1,2,4- benzene
Triazole, 3,5,3 ", 5 "-four -3- pyridines-[1,1 '；3 ', 1 "] terphenyl, 3- (diphenylphosphoric acid chlorine) -9- benzene -9H- carbazole, 3,
Bis- (diphenylphosphoric acid the chlorine) -9- benzene -9H- carbazoles of 6-, phosphine oxo-compound be two (2- (diphenylphosphino) benzene) ether oxygen compounds or
Person 2,8- bis- (diformazan benzenephosphonic acid) dibenzothiophen, anthracene compound 9,10- bis--(2- naphthalene) anthracene, and organic boron material is three (2,4,6-
Trimethyl -3- (pyridine -3-yl) benzene) borine, organo-sulfur materials 2,8- bis- (diformazan benzenephosphonic acid) dibenzothiophen.
4. the preparation method of white light organic electroluminescent device described in claim any one of described in claim 1-3 comprising
Following steps:
1. being cleaned by ultrasonic to substrate, it is put into baking oven after cleaning and is dried；
2. substrate is moved into vacuum film coating chamber, according to sequence from bottom to up, is prepared by dry or wet, successively made respectively
Standby anode layer, hole transmission layer, blue light-emitting layer, electron transfer layer and cathode layer, are made white light organic electroluminescent device；
3. the white light organic electroluminescent device that preparation is completed is packaged in nitrogen atmosphere.
5. the preparation method of white light organic electroluminescent device according to claim 4, the step 2. in, anode layer,
The directly successively dry process of hole transmission layer, blue light-emitting layer, electron transfer layer and cathode layer, or pass through organic solvent diluting
It is sequentially prepared afterwards by wet processing on substrate；Preferably, the anode layer, hole transmission layer, blue light-emitting layer, electronics pass
Defeated layer and cathode layer be respectively by vacuum evaporation, ionized cluster beam deposition, ion plating, DC sputtering deposition, radio-frequency sputtering plated film,
Ion beam sputtering deposition, ion beam assisted depositing, plasma reinforced chemical vapour deposition, high density inductive coupling plasma
Source chemical vapor deposition, catalyst chemical vapor deposition, magnetron sputtering, plating, spin coating, dip-coating, inkjet printing, roller coating or LB film
One of formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710217788.5A CN107123749B (en) | 2017-04-01 | 2017-04-01 | A kind of high color rendering index (CRI) white light organic electroluminescent device and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710217788.5A CN107123749B (en) | 2017-04-01 | 2017-04-01 | A kind of high color rendering index (CRI) white light organic electroluminescent device and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107123749A CN107123749A (en) | 2017-09-01 |
| CN107123749B true CN107123749B (en) | 2019-08-27 |
Family
ID=59726229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710217788.5A Active CN107123749B (en) | 2017-04-01 | 2017-04-01 | A kind of high color rendering index (CRI) white light organic electroluminescent device and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107123749B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108365113B (en) * | 2018-01-29 | 2019-08-20 | 苏州大学 | A kind of ultra high efficiency organic electroluminescent diode apparatus |
| CN108470838A (en) * | 2018-03-05 | 2018-08-31 | 中山大学 | A kind of organic electroluminescence device and preparation method thereof |
| CN109088008B (en) | 2018-08-23 | 2021-01-26 | 京东方科技集团股份有限公司 | Organic light-emitting device and display panel |
| CN109768179A (en) * | 2019-01-25 | 2019-05-17 | 广东工业大学 | A kind of organic electroluminescence device of simulated solar irradiation |
| CN112820833B (en) * | 2019-12-20 | 2023-05-30 | 吉林师范大学 | Organic white light device with dual-thermal-activation delayed fluorescence as light-emitting layer and preparation method thereof |
| CN112151687B (en) * | 2020-09-25 | 2024-02-09 | 京东方科技集团股份有限公司 | Organic electroluminescent device, display panel and display device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104247076B (en) * | 2012-04-20 | 2017-03-01 | 株式会社半导体能源研究所 | Light-emitting component, light-emitting device, electronic equipment and illuminator |
| CN102709484A (en) * | 2012-06-03 | 2012-10-03 | 南京师范大学 | White light organic electroluminescent device and preparation method of white light organic electroluminescent device |
| WO2014166584A1 (en) * | 2013-04-08 | 2014-10-16 | Merck Patent Gmbh | Organic electroluminescent device with thermally activated delayed fluorescence material |
| CN103219473A (en) * | 2013-04-26 | 2013-07-24 | 上海大学 | White organic light emitting device with single light emitting layer structure |
| JP5905916B2 (en) * | 2013-12-26 | 2016-04-20 | 出光興産株式会社 | Organic electroluminescence device and electronic device |
| CN103772362A (en) * | 2014-01-03 | 2014-05-07 | 吉林大学 | Pyrene-imidazole derivative and application thereof as electroluminescent material |
| CN105336872B (en) * | 2015-10-09 | 2017-06-23 | 北京大学深圳研究生院 | A kind of white organic LED device and preparation method |
| CN105374949A (en) * | 2015-11-26 | 2016-03-02 | 电子科技大学 | Organic light-emitting device and preparation method thereof |
-
2017
- 2017-04-01 CN CN201710217788.5A patent/CN107123749B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107123749A (en) | 2017-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107123749B (en) | A kind of high color rendering index (CRI) white light organic electroluminescent device and preparation method thereof | |
| CN107221603B (en) | A kind of undoped white organic light emitting device and preparation method thereof | |
| CN105503766B (en) | A kind of thermal activation delayed fluorescence material and organic electroluminescence device | |
| CN105742516B (en) | Light-emitting component, luminescent device, electronic device and illuminating device | |
| CN102136550B (en) | White light organic electroluminescent device and preparation method thereof | |
| CN102214800B (en) | White-light organic luminescent device and manufacturing method thereof | |
| CN106356464B (en) | A kind of white light organic electroluminescent device and preparation method thereof | |
| CN102255050B (en) | Light-emitting component, luminescent device, electronic device and illuminating device | |
| TW200915915A (en) | High-performance tandem white OLED | |
| CN110854279B (en) | OLED display panel and display device | |
| CN110190200B (en) | Efficient pure white light organic electroluminescent device with high color rendering index and preparation method thereof | |
| CN101635334A (en) | Red organic electroluminescence device and preparation method thereof | |
| CN102651454B (en) | Electroluminescent device, display device and preparation method of electroluminescent device | |
| CN102903854A (en) | White-light organic electroluminescent device and production method thereof | |
| CN102709485A (en) | OELD (Organic Electroluminescent Device) and preparation method thereof | |
| CN102214798B (en) | White light organic electroluminescent device and manufacturing method thereof | |
| CN101197428A (en) | White light organic electroluminescent device and method for fabricating the same | |
| CN101114699A (en) | Novel electroluminescent device and method for producing the same | |
| CN105322099A (en) | Full-fluorescence white light organic light-emitting diode and preparation method thereof | |
| CN106133936B (en) | Organic electric-field light-emitting element material and use its organic electric-field light-emitting element | |
| CN100546067C (en) | A kind of organic electroluminescence device and preparation method thereof | |
| CN106898709B (en) | A kind of red phosphorescent organic electroluminescence device | |
| CN105374949A (en) | Organic light-emitting device and preparation method thereof | |
| CN107425137B (en) | A kind of white light OLED device of high color rendering index (CRI) | |
| CN108470838A (en) | A kind of organic electroluminescence device and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |