CN102791051A - Color-adjustable organic electroluminescent device - Google Patents
Color-adjustable organic electroluminescent device Download PDFInfo
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- CN102791051A CN102791051A CN2012102464317A CN201210246431A CN102791051A CN 102791051 A CN102791051 A CN 102791051A CN 2012102464317 A CN2012102464317 A CN 2012102464317A CN 201210246431 A CN201210246431 A CN 201210246431A CN 102791051 A CN102791051 A CN 102791051A
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Abstract
The invention relates to a color-adjustable organic electroluminescent device. The electroluminescent device comprises a substrate, an anode and a cathode, wherein four organic electroluminescent units are arranged between the anode and the cathode, and emit blue light, yellow light, green light and red light in sequence; and a connection layer is arranged between every two adjacent organic electroluminescent units, and comprises a cavity generation layer, extraction electrodes and an electronic generation layer. According to the invention, light colors can be adjusted through changing the lead-out positions of the electrodes of the devices, so that the electroluminescent lighting source emitting 15 different colors is achieved, which meets the requirement of aesthetic appreciation and visual sense of human eyes.
Description
Technical field
The present invention relates to a kind of organic electroluminescence device of mixing colours (OLED), this light-source system comprises five leadout electrodes, regulates photochromicly through the mutual combination of different electrodes, realizes the lighting source of 15 kinds of colors.
Background technology
The electroluminescence of past high brightness mainly is to be produced by inorganic material, and up to l987, the C.W. Tang of U.S. Kodak company uses good film-forming property, has the oxine aluminium (Alq of electric transmission and fluorescent dye concurrently
3) film is luminescent material, introduces organic EL device to carrier blocking layers (aromatic diamines TDP), and adopts ultrathin membrane technology and low work function alkali metal (magnesium silver alloy, atomic ratio are 10:1) to make injecting electrode, obtain driving DC voltage low (<10 V), the high (> of luminosity; 1000 cdm
2) and the ultra-thin green device of efficient high (1.5 lm/w) after, people just vigorously carry out the research of organic electroluminescent.
For OLED, the White OLED with two or unnecessary two luminescent layers can have the luminous efficiency of better color and Geng Gao, and higher for mixing the tolerance that substrate concentration changes.Simultaneously, it is usually more stable than the OLED with a luminescent layer to have a White OLED of two luminescent layers.
People such as Jones, Tanaka, Kido and Liao disclose tandem OLED structure (stacked OLED (stacked OLED) or tandem type OLED (cascaded OLED)) in United States Patent (USP) and Japan Patent.Said tandem OLED is through the some single OLED unit of vertical stacking and use single power supply to drive this stacked body and make, and its advantage is that luminous efficiency and/or useful life are improved.Yet said cascaded structure needs roughly to improve driving voltage with the OLED unit number that is stacked with being directly proportional.
Compare with LED with traditional LC D; Organic electroluminescence device (OLED) have active illuminating, no visual angle problem, in light weight, thickness is little, high brightness, high-luminous-efficiency, luminescent material are abundant, be prone to realize coloredly show, response speed is fast, the serviceability temperature scope is wide, can realize a series of advantages such as flexible device, technology is simple, cost is low, shock resistance is strong, therefore be called as following ideal and show and lighting source.
According to the color science color matching principle, white light can be combined by two kinds or above monochromatic light, comprises dark blue+yellow, blueness+crocus, blueness+green+redness etc.And the white light characteristic of the composition of not sharing the same light and incomplete same, especially colour temperature can have significant change.The characteristic of low color temperature light sources is in the Energy distribution, and red radiation is some more relatively, is commonly referred to " warm light "; After colour temperature improved, in the Energy distribution, the ratio of blue radiation increased, and is commonly referred to " cold light ".The colour temperature of some light sources commonly used is: standard candle is that 1930K (kelvin degree unit), tungsten lamp are that 2760-2900K, fluorescent lamp are that 3000K, photoflash lamp are that 3800K sunlight at noon is that 5600K, flash tube are that 6000K, blue sky are 12000-18000K.
Summary of the invention
The objective of the invention is to defective, a kind of organic electroluminescence device of mixing colours (OLED) is provided, have and to adjust the function that changes the illumination color easily by the user to the prior art existence.Be characterized in using in occasions such as office, readings, the eye that can effectively reduce the user is tired; Use in places such as room, markets, its ambiance of scalable is more to adapt to people's mood needs.People can select adjusting automatically or manually selected photochromic in use, for it provides comfortable, pleasant luminous environment, have satisfied the market demand personalized and hommization to a certain extent.Do not have ultraviolet ray that fluorescent lamp contains in the OLED device and the eyes and the skin of harmful to human, belong to the lighting source of up-to-date environment protecting and power-saving, product will have the stronger market competitiveness and good market prospects.
For achieving the above object, the present invention adopts following technical proposals: a kind of organic electroluminescence device of mixing colours comprises: substrate; Anode; Negative electrode; It is characterized in that: comprise four organic electroluminescence cells between anode and the negative electrode, its glow color is followed successively by indigo plant, Huang, green, red; Comprise articulamentum between each organic electroluminescence cell, articulamentum produces the function of layer and extraction electrode simultaneously as charge carrier.
Said electron production layer constitutes with the alloy (like Mg:Ag and Li:Al alloy etc.) of low workfunction metal (like Mg, Ca, Li) with noncorroding metal; The said electrode that draws is made up of work function height and the good metal (like Ag, Ni, Au etc.) of electric conductivity; Simultaneously, said hole produces layer and can be simultaneously be made up of the electrode metal that draws of above-mentioned high work function.
For making the operate as normal of above-mentioned OLED device and luminous, the thickness that must guarantee above-mentioned each articulamentum is in 20nm.
In order to guarantee that light sees through from substrate, the thickness of electron production layer is in 5-10nm scope in the above-mentioned articulamentum, and extraction electrode/hole produces layer thickness in 5-15nm scope.
In addition, for improving above-mentioned OLED device luminous efficiency, produce in the articulamentum holes and to add hole injection layer (like MoOx/VOx etc.) between layer and the organic layer.
The present invention compared with prior art; Have following conspicuous outstanding substantive distinguishing features and marked improvement: characteristics of the present invention are on the basis of traditional OLED device, to draw each luminescent layer electrode; Thereby it is photochromic to make that through the different electrode of UNICOM device can send 15 kinds of differences of visible light, satisfies people to photochromic needs.
Description of drawings
Fig. 1 is a tandem OLED structure chart of the present invention
Fig. 2 is an extraction electrode circuit diagram of the present invention
The 1st, substrate
The 2nd, ito anode
The 3rd, the blue organic electroluminescent unit
The 4th, the electron production layer
5a is the negative electrode of blue light emitting unit and the anode of Yellow light emitting unit
5b is the negative electrode of Yellow light emitting unit and the anode of green luminescence unit
5c is the negative electrode of green luminescence unit and the anode of red light-emitting unit
The 6th, hole injection layer
The 7th, yellow organic electroluminescence cell
The 8th, green organic electroluminescence cell
The 9th, the red organic electrofluorescence unit
The 10th, negative electrode
A is an articulamentum.
Embodiment
The preferred embodiments of the present invention accompanying drawings is following:
Embodiment one:
Referring to Fig. 1, the organic electroluminescence device of originally can mixing colours comprises substrate (1), anode (2) and negative electrode (10); It is characterized in that: comprise four organic electroluminescence cells (3,7,8,9) between anode (2) and the negative electrode (10), its glow color is followed successively by indigo plant, Huang, green, red; Wherein comprise articulamentum (a) between each organic electroluminescence cell (3,7,8,9).
Embodiment two:
Present embodiment and embodiment one are basic identical, and special feature is following:
Articulamentum between the said organic electroluminescence cell (a) comprises electron production layer (4), extraction electrode (5a, 5b, 5c) and hole injection layer (6).Said articulamentum (a) extraction electrode (5a, 5b, 5c) is regulated the OLED glow color through the control electrode connected mode.
Said electron production layer (4) constitutes with the alloy of low workfunction metal and noncorroding metal; Said extraction electrode (5a, 5b, 5c) is made up of work function height and the good metal of electric conductivity; Simultaneously, said hole injection layer (6) is made up of the electrode metal that draws of above-mentioned high work function.
Said low workfunction metal is Mg, Ca or Li, and the alloy of said noncorroding metal is Mg:Ag or Li:Al alloy, and the good metal of said work function height and electric conductivity is Ag, Ni or Au.
Embodiment three:
Referring to Fig. 1 and Fig. 2, the structure and the embodiment two of the organic electroluminescence device of originally can mixing colours are basic identical, and its operation principle is following:
Energized in this OLED device, positive source connects 2, and negative electrode meets 5a, and 5a is as the negative electrode extraction electrode of this device, this OLED device blue light-emitting at this moment.
When positive source meets 5a, when negative pole meets 5b, device jaundice light.When positive source meets 5b, when negative pole meets 5c, the device green light.
When positive source meets 5c, negative pole connects at 10 o'clock, and device glows.
When positive source connects 2, negative pole meets 5a, adds a power supply simultaneously again; Positive pole meets 5a; When negative pole met 5b, 5a was as the negative pole of blue light organic luminous layer and the negative electrode extraction electrode of gold-tinted organic luminous layer, and 5b is as the negative electrode extraction electrode of gold-tinted organic luminous layer; Device sends by the blue and yellow white light that mixes, colour temperature higher (cold white light).
When positive source connects 2, negative pole meets 5a, and another positive source meets 5a simultaneously; Negative pole meets 5b; Add a positive source again and meet 5b, when negative electrode met 5c, 5a was as the negative pole of blue light organic luminous layer and the negative electrode extraction electrode of gold-tinted organic luminous layer; 5b is as the extraction electrode of the negative electrode of the negative electrode of gold-tinted organic luminous layer and green glow organic luminous layer, and device is sent out by blue, the yellow and green white light that mixes.
On the basis of the above; Increase by a power supply again, positive pole meets 5c, and negative pole connects 10; Then 5c is as the extraction electrode of the anode of the negative electrode of green organic luminous layer and red organic luminous layer, and this moment, device was sent out by blue, yellow, the green and red lower white light (warm white) of colour temperature that mixes.
And the like, this electrode one has 15 kinds and connects method, and the corresponding light that sends 15 kinds of colors, thereby satisfies the human eye vision requirement, and so that comfortable, pleasant luminous environment to be provided, the eye that reduces the user is tired.
Claims (5)
1. the organic electroluminescence device of can mixing colours comprises: substrate (1), anode (2) and negative electrode (10); It is characterized in that: comprise four organic electroluminescence cells (3,7,8,9) between anode (2) and the negative electrode (10), its glow color is followed successively by indigo plant, Huang, green, red; Wherein comprise articulamentum (a) between each organic electroluminescence cell (3,7,8,9), the effect of articulamentum (a) has the generation charge carrier---hole and electronics and extraction electrode---anodal and negative pole.
2. the organic electroluminescence device of can mixing colours according to claim 1, it is characterized in that: the articulamentum between the said organic electroluminescence cell (a) comprises electron production layer (4), extraction electrode (5a, 5b, 5c) and hole injection layer (6); Said articulamentum (a) extraction electrode (5a, 5b, 5c) is regulated the OLED glow color through the control electrode connected mode.
3. the organic electroluminescence device of described in claim 2, can mixing colours is characterized in that: said electron production layer (4) constitutes with the alloy of low workfunction metal and noncorroding metal; Said extraction electrode (5a, 5b, 5c) is made up of work function height and the good metal of electric conductivity; Simultaneously, said hole injection layer (6) is made up of the electrode metal that draws of above-mentioned high work function.
4. like the said organic electroluminescence device of mixing colours of claim 3; It is characterized in that: said low workfunction metal is Mg, Ca or Li; The alloy of said noncorroding metal is Mg:Ag or Li:Al alloy, and the good metal of said work function height and electric conductivity is Ag, Ni or Au.
5. like the said organic electroluminescence device of mixing colours of claim 4; It is characterized in that: the thickness of electron production layer (4) is 5-10nm in the said articulamentum (a); Extraction electrode (5a, 5b, 5c)/hole injection layer (6) thickness is 5-15nm, and total articulamentum (a) THICKNESS CONTROL is in 20nm.
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| CN2012102464317A CN102791051A (en) | 2012-07-17 | 2012-07-17 | Color-adjustable organic electroluminescent device |
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| CN2012102464317A CN102791051A (en) | 2012-07-17 | 2012-07-17 | Color-adjustable organic electroluminescent device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105895663A (en) * | 2016-05-19 | 2016-08-24 | 京东方科技集团股份有限公司 | Electroluminesecent display, fabrication method thereof and display device |
| CN110808338A (en) * | 2019-10-10 | 2020-02-18 | 复旦大学 | Tandem quantum dot device with double light emitting surfaces |
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| US20070001587A1 (en) * | 2005-06-29 | 2007-01-04 | Eastman Kodak Company | White light tandem OLED display with filters |
| US20100123150A1 (en) * | 2008-11-18 | 2010-05-20 | Munisamy Anandan | Hybrid organic light emitting diode |
| CN101819989A (en) * | 2010-03-29 | 2010-09-01 | 友达光电股份有限公司 | White organic light emitting diode |
| CN102280594A (en) * | 2011-05-20 | 2011-12-14 | 友达光电股份有限公司 | Organic electroluminescent light source |
-
2012
- 2012-07-17 CN CN2012102464317A patent/CN102791051A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070001587A1 (en) * | 2005-06-29 | 2007-01-04 | Eastman Kodak Company | White light tandem OLED display with filters |
| US20100123150A1 (en) * | 2008-11-18 | 2010-05-20 | Munisamy Anandan | Hybrid organic light emitting diode |
| CN101819989A (en) * | 2010-03-29 | 2010-09-01 | 友达光电股份有限公司 | White organic light emitting diode |
| CN102280594A (en) * | 2011-05-20 | 2011-12-14 | 友达光电股份有限公司 | Organic electroluminescent light source |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105895663A (en) * | 2016-05-19 | 2016-08-24 | 京东方科技集团股份有限公司 | Electroluminesecent display, fabrication method thereof and display device |
| CN105895663B (en) * | 2016-05-19 | 2018-11-13 | 京东方科技集团股份有限公司 | A kind of electro-luminescence display device, its production method and display device |
| US10325961B2 (en) | 2016-05-19 | 2019-06-18 | Boe Technology Group Co., Ltd. | Electroluminescent display, manufacture method thereof, and display device |
| CN110808338A (en) * | 2019-10-10 | 2020-02-18 | 复旦大学 | Tandem quantum dot device with double light emitting surfaces |
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Application publication date: 20121121 |