CN102270747A - Organic electroluminescent device - Google Patents
Organic electroluminescent device Download PDFInfo
- Publication number
- CN102270747A CN102270747A CN2010101981209A CN201010198120A CN102270747A CN 102270747 A CN102270747 A CN 102270747A CN 2010101981209 A CN2010101981209 A CN 2010101981209A CN 201010198120 A CN201010198120 A CN 201010198120A CN 102270747 A CN102270747 A CN 102270747A
- Authority
- CN
- China
- Prior art keywords
- light
- white light
- layer
- cie
- electroluminescence device
- 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.)
- Pending
Links
Images
Abstract
The invention provides a cold tonal white light OLED (Organic Light Emitting Diode) with a polarizer. Light emitted by the white light OLED is adjusted through the polarizer. The light transmittance of cold tonal light in superposition light is increased and the light transmittance of warm tonal light is inhibited so that the effect that the light is totally cold tonal white light is realized. Compared with the traditional cold tonal white light scheme, the cold tonal white light OLED has the advantages that the brightness is increased by 14 nit, but the power consumption is lowered.
Description
Technical field
The present invention relates to a kind of organic electroluminescence device, relate in particular to and a kind ofly can improve brightness, life-saving, regulate the device architecture of luminous tone.
Background technology
Organic electroluminescent is meant and adopts organic material layer as luminescent layer, is provided with cathode layer and anode layer in the luminescent layer both sides, adds voltage at two interpolars, and when electric current passed through luminescent layer, the organic material of luminescent layer will be luminous.People have made organic electroluminescence device (Organic Light Emitting Diode is hereinafter to be referred as OLED) according to this principle.OLED is with respect to traditional liquid crystal display device, and body is thin, advantages such as preparation technology is simple, luminescent material solidifies entirely, device flexibility have caused people's extensive concern but have, and increasing OLED is applied to showing and lighting field.
The color difference of the different light that organic material sent it has been found that the organic material that can produce blueness, redness and yellow light, does not almost have but can stablize the organic material that sends white light.So the researcher superposes by the luminescent material with different colours, make them simultaneously luminous, so just can obtain White OLED.
White light OLED is divided into the cool tone white light OLED again according to the tone difference, the warm tones white light OLED.The cool tone white light OLED has been applied to using comparatively general on the equipment such as instrument, vehicle electronics, domestic electronic at present.Common cool tone has green, blueness.For white light OLED being sent have the light of cool tone, need to improve the luminous efficiency of OLED medium blue coloured light or green light, form the cool tone white light OLED.
Put down in writing among the patent CN200610103960.6, it is lower that the light of existing OLED takes out efficient, is about about 20%, has 80% light not launch OLED.The light transmission rate of existing polaroid has only about 43%, this patent adopts polaroid to improve the whole light transmission rate of 500-640nm wavelength period among the OLED, light transmittance reaches 53-59%, and the light of 500-640nm wavelength period comprises blue light, green glow, gold-tinted, orange-colored light, ruddiness.
In the existing preparation, the blue material luminous efficiency of white light OLED is lower, and the most of warm tones partially of the white light OLED that obtains is difficult to practical requirement.
Summary of the invention
The present inventor is based on the problems referred to above, through research, a kind of cool tone white light OLED with polaroid is proposed, the light that this white light OLED sends is regulated by polaroid, increase the light transmittance of the central cool colour light modulation of light of stack, the light transmittance that suppresses the warm colour light modulation, realizing totally is the effect of cool tone white light.The present invention can realize by following device architecture:
A kind of organic electroluminescence device, comprise anode layer, cathode layer and the organic function layer between anode layer and cathode layer, described organic electroluminescence device sends first white light, the chromaticity coordinates scope of described first white light is (CIE-X＞0.30, CIE-Y＞0.34), also comprise a polaroid, described polaroid is attached on this organic electroluminescence device, described first white light sees through polaroid and forms second white light, the chromaticity coordinates scope of second white light is (CIE-X≤0.30, CIE-Y≤0.34).
Wherein, described polaroid to the light transmittance of wave-length coverage 420-480nm greater than 55%, to the light transmittance of wave-length coverage 640～700nm greater than 55%, to wave-length coverage 500～600nm light transmittance less than 45%.
Wherein, to the light transmittance of wave-length coverage 420-480nm less than 70%.
Wherein, the chromaticity coordinates scope of described first white light is (0.30＜CIE-X≤0.34,0.34＜CIE-Y≤0.39).
Wherein, described organic function layer comprises: blue emitting material mixes with red illuminating material.
Wherein, described blue emitting material crest scope is 420-480nm, and the crest scope of red illuminating material is 640-700nm.
The present invention is with respect to existing cool tone white light version, and brightness improves 14nit, and power consumption decreases.
Description of drawings
Fig. 1 is the basic block diagram in the organic electroluminescence device of the present invention's proposition.
Fig. 2 is chromaticity coordinates figure.
Embodiment
Basic structure in the organic electroluminescence device that the present invention proposes as shown in Figure 1, wherein:
01 is substrate, can be glass or flexible substrate, and flexible substrate adopts a kind of material in polyesters, the polyimides compounds;
02 is anode layer, can adopt inorganic material or organic conductive polymer.Inorganic material is generally tin indium oxide (be called for short ITO), the higher metals of work function such as metal oxide such as zinc oxide, zinc tin oxide or gold, copper, silver, preferred ITO; The organic conductive polymer is preferably a kind of material in polythiophene/polyvinylbenzenesulfonic acid sodium (hereinafter to be referred as PEDOTPSS), the polyaniline (hereinafter to be referred as PANI);
03 is hole transmission layer, material for example, have amino substituting group De oxadiazole compound, have amino substituent triphenyl methane compound, three grades of compounds, hydrazone compound, pyrazoline compounds, enamine compound, compound of styryl, 1,2-diphenyl ethene compounds or carbazole compound.Can also adopt the halide of bismuth metal or the oxide of bismuth metal to mix.
04 is luminescent layer, can be one or more luminescent layers.The general small molecule material that adopts can be a fluorescent material, as metal organic complex Alq
3, Gaq
3, Al (Saph-q) or Ga (Saph-q) compounds, can be doped with dyestuff in this small molecule material, be generally a kind of material in aromatic condensed ring class (as rubrene), Coumarins (as DMQA, C545T) or two pyrans class (as DCJTB, the DCM) compound, doping content is the 0.01wt%～20wt% of small molecule material.The luminescent layer material also can adopt carbazole derivates such as CBP, polyvinylcarbazole Doping Phosphorus photoinitiator dyes such as (PVK), Ir (ppy)
3, Ir (ppy)
2(acac) or Ir (mppy)
3Can be used as the green glow dyestuff; Ir (piq)
3, Ir (piq)
2(acac), Btp
2Ir (acac), Ir (MDQ)
2(acac), Ir (DBQ)
2(acac), Ir (fbi)
2(acac), Ir (2-phq)
3, Ir (2-phq)
2(acac), Ir (bt)
2(acac) or PtOEP can be used as red dye; Ir (MDQ)
2(acac), Ir (DBQ)
2(acac), Ir (fbi)
2(acac), Ir (2-phq)
3, Ir (2-phq)
2(acac) or Ir (bt)
2(acac) can be used as the gold-tinted dyestuff, blue light material is an anthracene derivative.
05 is electron transfer layer (nonessential), and material can be anthracene compound, phenanthrene compound, fluoranthene compound, benzo (9,10) phenanthrene compound, diazole compounds or vinylidene compound.
06 is cathode layer, generally adopts the alloy of the lower metal of work functions such as lithium, magnesium, calcium, strontium, aluminium, indium or they and copper, gold, silver, or the electrode layer that alternately forms of metal and metal fluoride, and the present invention is preferably LiF layer, Al layer successively.
07 is polaroid.
Chromaticity coordinates figure such as Fig. 2, luminescent layer of the present invention adopt blue light+red light stack to generate white light, and the white light chromaticity coordinates of generation is (0.30＜CIE-X≤0.34,0.34＜CIE-Y≤0.39).Wherein the crest scope of blue light is 420-480nm, and the crest scope of red light is 640-700nm.
According to the rules, obtain the cool tone white light, the chromaticity coordinates of the white light of generation should be (CIE-X≤0.30, CIE-Y≤0.34), is blue partially white light.The present invention attaches one deck polaroid film on OLED, improve blue light efficient, suppress sodium yellow efficient, the lateral chromatism coordinate figure is descended 0.04, vertically the chromaticity coordinates value descends 0.05, the chromaticity coordinates of the white light that make to generate drops to and (in the CIE-X≤0.34-0.04=0.30, CIE-Y≤0.39-0.05=0.34), satisfies the requirement of cool tone white light OLED.
Polaroid screens the light of different colours, strengthens the taking-up efficient and the light transmittance of cool tone light, suppresses the light transmittance of warm tones light.This polaroid strengthens respectively or weakens different-waveband light.Be specially:
In blue region, wave-length coverage 420～480nm, the light transmittance that is preferably 460-480nm is greater than 55%, less than 70%; Light transmittance surpasses 70% can influence the contrast of display degree.In green-yellow light, gold-tinted zone, wave-length coverage 500～600nm, the light transmittance that is preferably 550-600nm is less than 45%; In the ruddiness zone, the light transmittance of wave-length coverage 640～700nm is greater than 55%.
To provide some embodiment below, and specific explanations technical scheme of the present invention in conjunction with the accompanying drawings.Should be noted that the following examples only are used for helping to understand invention, rather than limitation of the present invention.
Comparative Examples 1
Device architecture is:
ITO/HIL(850
)/NPB(200
)/BH:BD(90
，4％)/RH:RD(300
，2％)/Alq3(200
)/LiF(5
)/Al(1500
)
Processing step is:
(1) utilizes the ultrasonic and ultrasonic method of deionized water of the washing agent boil that glass substrate is cleaned, and be placed on infrared lamp under and dry.
(2) at evaporation one deck ITO on glass as anode, thickness is 180nm;
(3) adopt method evaporation MTDATA that double source steams altogether (4,4 ', 4 "-three (3-aminomethyl phenyl aniline) triphenylamine) and F
4TCNQ is as HIL, and thickness is 85nm.The mass percent that F4TCNQ mixes in MTDATA is 4%.
(4) the above-mentioned glass substrate that has anode is placed in the vacuum chamber, be evacuated to 1 * 10
-5Pa continues evaporation one deck NPB film as hole transmission layer on above-mentioned anode tunic, speed is 0.1nm/s, and the evaporation thickness is 20nm;
(5) method that adopts double source to steam is altogether earlier carried out the evaporation doping of first luminescent layer, and the doping ratio of BD in BH is 4wt%, and total film thickness is 9nm; The evaporation that the method that adopts double source to steam is altogether again carried out second luminescent layer mixes, and the doping ratio of RD in BH is 2wt%, and total film thickness is 30nm;
(6) on luminescent layer, continue evaporation one deck Alq
3Material is as electron transfer layer, and its evaporation speed is 0.2nm/s, and the evaporation total film thickness is 20nm;
(7) last, evaporation LiF layer and Al layer are as the cathode layer of device successively on above-mentioned luminescent layer, and wherein the evaporation speed of LiF layer is 0.01～0.02nm/s, and thickness is 0.5nm, and the evaporation speed of Al layer is 2.0nm/s, and thickness is 150nm.
(8) encapsulation, nation is fixed.
(9) exiting surface at OLED attaches the common polaroid of one deck.
Device architecture is:
ITO/HIL(850
)/NPB(200
)/BH:BD(90
，4％)/RH:RD(300
，2％)/Alq3(200
)/LiF(5
)/Al(1500
)
Processing step is:
(1) utilizes the ultrasonic and ultrasonic method of deionized water of the washing agent boil that glass substrate 01 is cleaned, and be placed on infrared lamp under and dry.
(2) at evaporation one deck ITO on glass as anode 02, thickness is 180nm;
(3) adopt method evaporation MTDATA that double source steams altogether (4,4 ', 4 "-three (3-aminomethyl phenyl aniline) triphenylamine) and F
4TCNQ is as HIL, and thickness is 85nm.The mass percent that F4TCNQ mixes in MTDATA is 4%.
(4) the above-mentioned glass substrate that has anode is placed in the vacuum chamber, be evacuated to 1 * 10
-5Pa continues evaporation one deck NPB film as hole transmission layer 03 on above-mentioned anode tunic, speed is 0.1nm/s, and the evaporation thickness is 20nm;
(5) method that adopts double source to steam is altogether earlier carried out the evaporation doping of first luminescent layer 04 (1), and the doping ratio of BD in BH is 4wt%, and total film thickness is 9nm; The evaporation that the method that adopts double source to steam is altogether again carried out second luminescent layer 04 (2) mixes, and the doping ratio of RD in BH is 2wt%, and total film thickness is 30nm;
(6) on luminescent layer, continue evaporation one deck Alq
3Material is as electron transfer layer 05, and its evaporation speed is 0.2nm/s, and the evaporation total film thickness is 20nm;
(7) last, evaporation LiF layer and Al layer are as the cathode layer 06 of device successively on above-mentioned luminescent layer, and wherein the evaporation speed of LiF layer is 0.01～0.02nm/s, and thickness is 0.5nm, and the evaporation speed of Al layer is 2.0nm/s, and thickness is 150nm.
(8) encapsulation, nation is fixed.
(9) exiting surface at OLED attaches one deck polaroid 07 of the present invention, and this polaroid screens the light of different colours, improves the taking-up efficient of cool tone light, suppresses the taking-up efficient of warm tones light.
When the white light OLED of present embodiment 1 did not attach polaroid, chromaticity coordinates was (0.33,0.34), belonged to the warm tones white light.After attaching polaroid, chromaticity coordinates becomes (0.28,0.29), reaches the requirement of cool tone white light.Comparative Examples 1 is existing cool tone white light, and chromaticity coordinates is (0.30,0.32), and present embodiment 1 is with respect to Comparative Examples 1, and after the attaching polaroid, brightness improves 14nit, and power consumption decreases.Table 1 be Comparative Examples 1 and embodiment 1 under constant-pressure conditions, record the contrast of parameter.
Table 1
Though the present invention is to disclose as above than preferable embodiment; yet it is not in order to limit the present invention; anyly be familiar with this technology personage; without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations; therefore, protection scope of the present invention is as the criterion when the claim with application defines.
Claims (6)
1. organic electroluminescence device, comprise anode layer, cathode layer and the organic function layer between anode layer and cathode layer, described organic electroluminescence device sends first white light, the chromaticity coordinates scope of described first white light is (CIE-X＞0.30, CIE-Y＞0.34), it is characterized in that, also comprise a polaroid, described polaroid is attached on this organic electroluminescence device, described first white light sees through polaroid and forms second white light, the chromaticity coordinates scope of second white light is (CIE-X≤0.30, CIE-Y≤0.34).
2. according to the organic electroluminescence device of claim 1, it is characterized in that, described polaroid to the light transmittance of wave-length coverage 420-480nm greater than 55%, to the light transmittance of wave-length coverage 640～700nm greater than 55%, to wave-length coverage 500～600nm light transmittance less than 45%.
3. according to the organic electroluminescence device of claim 2, it is characterized in that, to the light transmittance of wave-length coverage 420-480nm less than 70%.
4. according to the organic electroluminescence device of claim 1, it is characterized in that the chromaticity coordinates scope of described first white light is (0.30＜CIE-X≤0.34,0.34＜CIE-Y≤0.39).
5. according to the organic electroluminescence device of claim 1, it is characterized in that described organic function layer comprises: blue emitting material mixes with red illuminating material.
6. according to the organic electroluminescence device of claim 5, it is characterized in that described blue emitting material crest scope is 420-480nm, the crest scope of red illuminating material is 640-700nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101981209A CN102270747A (en) | 2010-06-03 | 2010-06-03 | Organic electroluminescent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101981209A CN102270747A (en) | 2010-06-03 | 2010-06-03 | Organic electroluminescent device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102270747A true CN102270747A (en) | 2011-12-07 |
Family
ID=45052963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101981209A Pending CN102270747A (en) | 2010-06-03 | 2010-06-03 | Organic electroluminescent device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102270747A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270746A (en) * | 2010-06-03 | 2011-12-07 | 昆山维信诺显示技术有限公司 | Organic electroluminescent device and manufacturing method thereof as well as polarizer |
| US10424754B2 (en) | 2015-03-30 | 2019-09-24 | Boe Technology Group Co., Ltd. | Organic light emitting diode device, display panel and display device |
| CN110968218A (en) * | 2019-11-12 | 2020-04-07 | 合肥维信诺科技有限公司 | Touch display panel and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333322A (en) * | 2000-07-07 | 2002-01-30 | Tdk株式会社 | Laminated fluorescence and EL plate |
| CN1950791A (en) * | 2004-05-05 | 2007-04-18 | 皇家飞利浦电子股份有限公司 | Lighting device with user interface for light control |
-
2010
- 2010-06-03 CN CN2010101981209A patent/CN102270747A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333322A (en) * | 2000-07-07 | 2002-01-30 | Tdk株式会社 | Laminated fluorescence and EL plate |
| CN1950791A (en) * | 2004-05-05 | 2007-04-18 | 皇家飞利浦电子股份有限公司 | Lighting device with user interface for light control |
Non-Patent Citations (1)
| Title |
|---|
| 委福祥,等: "新型苯乙烯衍生物掺杂的蓝色及白色有机电致发光器件", 《物理学报》, vol. 55, no. 4, 30 April 2006 (2006-04-30), pages 2008 - 2013 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270746A (en) * | 2010-06-03 | 2011-12-07 | 昆山维信诺显示技术有限公司 | Organic electroluminescent device and manufacturing method thereof as well as polarizer |
| US10424754B2 (en) | 2015-03-30 | 2019-09-24 | Boe Technology Group Co., Ltd. | Organic light emitting diode device, display panel and display device |
| CN110968218A (en) * | 2019-11-12 | 2020-04-07 | 合肥维信诺科技有限公司 | Touch display panel and preparation method thereof |
| CN110968218B (en) * | 2019-11-12 | 2024-03-01 | 合肥维信诺科技有限公司 | Touch display panel and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101630721B (en) | Organic electroluminescent component | |
| CN101752512B (en) | Light-emitting element, light-emitting device, lighting device, and electronic device | |
| CN101414665B (en) | Light-emitting device | |
| CN102136550B (en) | White light organic electroluminescent device and preparation method thereof | |
| US8986853B2 (en) | Red phosphorescent composition and organic electroluminescent device using the same | |
| CN101217187B (en) | Preparation method if organic electroluminescence device with super-thin layer structure | |
| CN105655372B (en) | Organic light-emitting display device | |
| TW202013786A (en) | Light-emitting device, electronic device, and lighting device | |
| CN108352455A (en) | Light-emitting component and its manufacturing method and luminescent method | |
| CN101728490A (en) | White organic electroluminescent device | |
| CN110190200B (en) | Efficient pure white light organic electroluminescent device with high color rendering index and preparation method thereof | |
| Yang et al. | High-efficiency and high-quality white organic light-emitting diode employing fluorescent emitters | |
| CN101452997B (en) | Organic electroluminescent devices of laminated construction | |
| CN108011040A (en) | A kind of green organic electrofluorescence device | |
| CN105552239A (en) | White organic light emitting display device and organic light emitting display apparatus using the same | |
| CN102779948A (en) | White organic electroluminescent device and manufacturing method thereof | |
| CN113659084A (en) | High-efficiency high-color-rendering-index warm white organic electroluminescent device and preparation method thereof | |
| CN109400590A (en) | A kind of thermal activation delayed fluorescence material and its application in Organic Light Emitting Diode | |
| Yang et al. | Fluorescent deep-blue and hybrid white emitting devices based on a naphthalene–benzofuran compound | |
| CN104347808B (en) | A kind of color stability white light organic electroluminescent device high | |
| CN106057863A (en) | Multi-primary-color OLED display device | |
| CN106611820A (en) | Organic light emitting display device | |
| CN102064282B (en) | Organic electroluminescent device | |
| CN112909211B (en) | Material for forming blue light-emitting layer, light-emitting device, light-emitting substrate, and light-emitting device | |
| KR102325672B1 (en) | Organic compound and Light emitting diode and Organic light emitting diode display device using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111207 |