CN101170162A - Organize EL lighting source part - Google Patents
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- CN101170162A CN101170162A CN 200710171108 CN200710171108A CN101170162A CN 101170162 A CN101170162 A CN 101170162A CN 200710171108 CN200710171108 CN 200710171108 CN 200710171108 A CN200710171108 A CN 200710171108A CN 101170162 A CN101170162 A CN 101170162A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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Abstract
The invention discloses an organic electrofluorescence lighting source device and relates to electrofluorescence lighting technical field. The problem to be solved is the technical problem of the organic electrofluorescence light source heat radiation perform and stability improvement. The organic electrofluorescence light source device includes a base plate, an anode layer, at least one organic fluorescence layer, a cathode layer and a sealing cover from bottom to top. The base plate is provided with a luminescence lighting area and a perimeter area. The anode layer, at least one organic electrofluorescence lighting layer and the cathode layer are arranged above the luminescence lighting area. The edge of the anode layer is connected with anode lead wires and the cathode layer is connected the cathode lead wires. The invention is characterized in that: the edge of the anode layer is also connected with an anode heat radiation component and the edge of the cathode layer is also connected with a cathode heat radiation component. The invention has the advantages of good heat radiation performance, high stability and long service life.
Description
Technical field
The present invention relates to the organic electroluminescent technology, particularly relate to a kind of organize EL lighting source part structure and manufacture method thereof that has thermal component.The heat that the large tracts of land organic electroluminescence device can be produced effectively derives this lighting source part, improves the device heat dispersion, improves device stability.
Background technology
Illumination has consumed a large amount of energy, and according to statistics, 20% of global annual energy output is used to illumination.Incandescent lamp and fluorescent tube are two kinds of conventional white light light sources the most commonly used at present, but they are not high to the utilization ratio of energy: incandescent lamp with 90% Conversion of energy for heat energy, caused a large amount of energy wastes, and fluorescent tube has only utilized also 70% energy to be used for luminous.Based on this, the luminous efficiency of incandescent lamp is generally 13lm/W ~ 20lm/W, and fluorescent tube is 90lm/W.For energy savings, improve energy utilization efficiency, the development of new white light source is highly significant with prospect.
(organic light-emitting diodes OLED) has attracted the extensive studies attentiveness in the period of the technology nearly in the past 20 and has obtained significant progress organic electroluminescent LED.Along with the performance of monochromatic OLED is ripe gradually, white light OLED (white organic light-emitting diodes, WOLED) as a kind of new type of solid state light source, represent good prospects for application at aspects such as illumination and dull and stereotyped display backlight, attracted people more and more to note.1994, the people such as Kido of Japan prepared first WOLED, comprise ruddiness, green glow and blue emission in device simultaneously, mixed and formed white light.Because the problem that device architecture and material are selected, the energy efficiency of device is lower than 1lm/W, the very high and less stable of driving voltage.But in research subsequently, the efficient of WOLED and performance have obtained raising at full speed.At present, OLED has obtained the total energy efficiency of 30lm/W ~ 60lm/W in laboratory research, substantially exceeded incandescent light source.
Had at present many life-spans to surpass the report of 20,000 hours monochromatic OLED, but the typical life of WOLED is still less than 5000 hours, for the efficient and the life-span that meet and exceed fluorescent tube, WOLED still faces many difficult problems and challenge.
As new type of solid state area source device, organize EL lighting source part more and more is subjected to people's attention.But restrict its key factor that further develops be, most research is all based in the small size model in the laboratory, and the challenge that it faces is to improve efficient and the life-span of device under high current work state.Along with the continuous expansion of organize EL lighting source size, need more substantial electric current to be injected with organic electroluminescence devices.And so big power consumption makes organize EL lighting source produce a large amount of heat, so just must cause improving constantly of its operating temperature.When operating temperature constantly raises, for the OLED organic material of glass transition temperature o'clock about 100, be fatal fully, can significantly find the reduction of OLED brightness, the shortening in life-span.On the one hand, the raising of device temperature easily makes aging the speeding up of organic electroluminescence device like this, just must cause the reduction of organic electroluminescence device luminous efficiency and stability.On the other hand, be difficult to come out at the heat of large tracts of land area source zone line, cause the sex change gradually of zone line organic material at last, cause the luminous slowly deepening of device, What is more, directly causes the fusing of zone line organic material, and then burn device.
Summary of the invention
At the defective that exists in the above-mentioned prior art, technical problem to be solved by this invention provides a kind of perfect heat-dissipating, and stability is high, the organize EL lighting source part of long service life.
In order to solve the problems of the technologies described above, a kind of organize EL lighting source part provided by the present invention, comprise from bottom to top: substrate, anode layer, at least one deck organic electro luminescent layer, cathode layer and sealing-in lid, substrate is provided with a luminous lighting zone and a neighboring area, anode layer, at least one deck organic electro luminescent layer, cathode layer is located on the luminous lighting zone, the anode layer edge connects anode tap, the cathode layer edge connects cathode leg, it is characterized in that, described anode layer edge also connects the anode thermal component, and described cathode layer edge also connects the negative electrode thermal component.
Further, described anode thermal component comprises the anode heat radiation internals that are positioned at the sealing-in lid and extends to the outer outer part of anode heat radiation of sealing-in lid.
Further, described negative electrode thermal component comprises the negative electrode heat radiation internals that are positioned at the sealing-in lid and extends to the outer outer part of negative electrode heat radiation of sealing-in lid.
Further, described anode thermal component and described negative electrode thermal component are by constituting as the conductive coefficient of Al or Cr etc. the thin-film material greater than 50W/mK.
Further, described anode thermal component and described negative electrode thermal component are that metal (film) material constitutes.
Further, the thin-film material of described anode thermal component and described negative electrode thermal component comprises Al, Cr, Al-Ag alloy, Ag, Mg-Ag alloy etc.
Further, described anode thermal component and negative electrode thermal component lay respectively at the neighboring area of described substrate.
Utilize organize EL lighting source part provided by the invention, owing to adopt the thermal component in substrate periphery zone to be connected with organic electroluminescence device, can be with the heat that organic electroluminescence device produced, effectively derive organic electroluminescence device, damage because of operating temperature is too high to avoid organic electroluminescence device.By photoetching, on substrate, etch default anode layer, anode tap and anode thermal component or conducting-heat elements figure.Wherein anode material preferably clear electric conducting material ITO is coated with the high anode auxiliary material of conductive coefficient, as Cr, Ag or Ag alloy etc. on anode.On default anode pattern, utilize mask plate (mask) to deposit the hole organic function layer that comprises hole transmission layer and hole injection layer successively by vacuum evaporation, and luminescent layer; Make the functional layer that comprises electron transfer layer and electron injecting layer more successively; Utilize mask plate (mask) vacuum deposited metal cathode material.In the identical process that forms metal electrode, directly form at least one thermal component or conducting-heat elements.Therefore, whole manufacture craft process can not increase the cost of manufacture and the process complexity of device.
Description of drawings
Fig. 1 is the organize EL lighting source part OLED of prior art;
Fig. 2 is the structural representation block diagram of the embodiment of the invention one organize EL lighting source part;
Description of reference numerals:
110～substrate; 120～sealing-in lid; 130～organic electroluminescence device; 140～anode layer; 141～anode tap; 150～cathode layer; 151～cathode leg; 210～substrate; 220～sealing-in lid; 230～organic electroluminescence device; 240～anode layer; 241～anode tap; 250～cathode layer; 251～cathode leg; 260～negative electrode thermal component; 261～negative electrode conducting-heat elements; 270～anode thermal component; 271～anode conducting-heat elements.
Embodiment
Below in conjunction with description of drawings the embodiment of the invention is described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
As shown in Figure 2, a kind of organize EL lighting source part that the embodiment of the invention provided, comprise from bottom to top: substrate 210, anode layer 240, single (or many) layers organic electro luminescent layer 230, cathode layer 250 and sealing-in lid 220, substrate 210 is provided with 230 and one neighboring area, a luminous lighting zone (same organic electro luminescent layer), anode layer 240, single (or many) layers organic electro luminescent layer 230, cathode layer 250 is located on the luminous lighting zone, anode layer 240 edges connect anode tap 241, cathode layer 250 edges connect cathode leg 251, it is characterized in that, described anode layer 240 edges also connect the anode thermal component, and described anode thermal component comprises anode heat radiation internals 270 that are positioned at sealing-in lid 220 and the outer parts 271 of anode heat radiation that extend to outside the sealing-in lid 220; Described cathode layer 250 edges also connect the negative electrode thermal component, described negative electrode thermal component comprises negative electrode heat radiation internals 260 that are positioned at sealing-in lid 220 and the outer parts 261 of negative electrode heat radiation that extend to outside the sealing-in lid 220, described anode thermal component and described negative electrode thermal component lay respectively at the neighboring area of this substrate 210 by constituting as the higher thin-film material of conductive coefficients such as Al or Cr.
The embodiment of the invention is similar in appearance to the organize EL lighting source part of as shown in Figure 1 prior art, it is that the neighboring area in luminous lighting zone 230 is distributed with at least one male or female thermal component that difference is at electroluminescent light source of the present invention, and these thermal components respectively with this lighting source part in anode layer 250 be connected with cathode layer 240, directly play heat conduction and thermolysis.
Organize EL lighting source part 230 is light sources that are used to throw light on of large-size, and for example diagonal is greater than 4 inches, with the higher source luminance of big current drives.Because the large scale lighting source needs a large amount of electric current injection devices, and this power consumption must make organize EL lighting source 230 produce a large amount of heat, and this just improves constantly the operating temperature of organic electroluminescence device 230.When the rising of operating temperature, for the OLED organic material of glass transition temperature o'clock about 100, can significantly find the reduction of OLED brightness.On the one hand, the raising of device temperature easily makes organic electroluminescence device 230 aging speeding up like this, just must cause the reduction of organic electroluminescence device 230 luminous efficiencies and stability.On the other hand, be difficult to come out at the heat of large tracts of land area source zone line, cause the sex change gradually of zone line organic material at last, cause the luminous slowly deepening of device, What is more, directly causes the fusing of zone line organic material, and then burn device.According to a preferred implementation of the present invention, utilize the male or female thermal component of substrate 210 neighboring areas, directly be connected with the electrode layer of organic electroluminescence device, the heat that organic electroluminescence device 130 can be produced, effectively derive organic electroluminescence device 130, damage because of operating temperature is too high to avoid organic electroluminescence device 130.
It should be noted that the heat that derives this moment is still in the electroluminescent light source the inside because these male or female heat radiation internals 270 and 260 are also just covered among 220 in sealing-in, not having thoroughly derives.For this reason, male or female heat radiation internals 270,260 in the sealing-in lid 220 are not the terminal point of entire heat dissipation path, male or female heat radiation internals 270,260 can be directly connected to sealing-in by male or female heat radiation outer part 271 and 261 and cover 220 outsides, can directly contact, further heat dissipation be arrived extraneous with ambient atmosphere.Embodiments of the invention directly utilize cathode material and anode auxiliary material as male or female heat radiation internals 270 and 260.When photoetching anode auxiliary material (Cr or Ag etc.), directly form part 271 outside anodes such as Cr or Ag heat radiation internals 270 and the anode heat radiation; When forming negative electrode, utilize mask directly to form negative electrode heat radiation internals 260 and the outer part 261 of negative electrode heat radiation.Described anode thermal component and described negative electrode thermal component are by constituting as the conductive coefficient of Al or Cr etc. the thin-film material greater than 50W/mK; Described anode thermal component and described negative electrode thermal component can be by comprising that metal (film) materials such as Al, Cr, Al-Ag alloy, Ag, Mg-Ag alloy constitute.
In order to solve the problems of the technologies described above, the manufacture method of a kind of organic elctroluminescent device provided by the present invention the steps include:
1), by photoetching, on substrate 210, etch part 271 figures outside default anode layer 240, anode tap 241 and anode heat radiation internals 270 or the anode heat radiation.Wherein anode material preferably clear electric conducting material ITO is coated with the high anode auxiliary material of conductive coefficient, as Cr, Au, Ag or Ag alloy etc. on anode.
2), by vacuum evaporation on default anode pattern, utilize mask plate (mask) to deposit the hole organic function layer that comprises hole transmission layer and hole injection layer successively, and a luminescent layer; Make the functional layer that comprises electron transfer layer and electron injecting layer more successively;
3), utilize mask plate (mask) vacuum moulding machine cathode material.In the identical process that forms cathode electrode 250, directly form at least one thermal component 260 and conducting-heat elements 261.Wherein cathode material preferred metal materials Al also can be Ca, Ag or Mg-Ag alloy etc.Further, according to the embodiment of the invention, anode thermal component 270,271 all can form in same process simultaneously.
It is characterized in that,
Described step 1), 3) in, utilizes accurate mask plate in forming the metallic cathode process, can directly form many negative electrode heat radiation internals 260 and the outer part 261 of negative electrode heat radiation simultaneously.Anode thermal component 270,271 also can form in this process.
In traditional organize EL lighting source part (Fig. 1), except ITO is that anode material and Al are cathode material, periphery all is the very poor glass substrate of thermal conductivity (conductive coefficient K=1.4-2W/mK).The heat that organic electroluminescence device produced, the terminal point that transmits is anode layer ITO and glass substrate downwards, and the terminal point that upwards transmits is the negative electrode of organic electroluminescence device.And cathode material commonly used is a metal, comprises Al, Al-Ag alloy, Ag, Mg-Ag alloy or the like, and its conductive coefficient K is far longer than the conductive coefficient K of glass substrate generally greater than 160W/mK.Therefore, the heat that organic electroluminescence device produced can upwards be passed to the negative electrode of organic electroluminescence device.And according to a preferred embodiment of the invention, be provided with a plurality of thermal components in the organic electroluminescence device neighboring area, and directly link to each other with negative electrode or by heat-conducting piece coupled, the heat energy that causes organic electroluminescence device to produce directly passes out device itself, thereby increases device stability.The preferred thickness of cathodic metal is greater than 150nm.
On the other hand, electric current also is injected with organic electroluminescence devices by anode material transparent conductive material ITO commonly used.Therefore, the heat that organic electroluminescence device produced can be passed to the anode of organic electroluminescence device downwards, and according to a preferred embodiment of the invention, neighboring area in the organic electroluminescence device anode also is provided with a plurality of thermal components, this mainly is to be used to take away the heat that is produced when injecting by the ITO electric current, also organic electroluminescence device is played thermolysis simultaneously.
Claims (7)
1. organize EL lighting source part, comprise from bottom to top: substrate, anode layer, one deck organic electro luminescent layer, cathode layer and sealing-in lid at least, described substrate is provided with a luminous lighting zone and a neighboring area, described anode layer, one deck organic electro luminescent layer, cathode layer are located on the described luminous lighting zone at least, the anode layer edge connects anode tap, the cathode layer edge connects cathode leg, it is characterized in that, described anode layer edge also connects the anode thermal component, and described cathode layer edge also connects the negative electrode thermal component.
2. organize EL lighting source part according to claim 1 is characterized in that, described anode thermal component comprises the anode heat radiation internals that are positioned at the sealing-in lid and extends to the outer outer part of anode heat radiation of sealing-in lid.
3. organize EL lighting source part according to claim 1 is characterized in that, described negative electrode thermal component comprises the negative electrode heat radiation internals that are positioned at the sealing-in lid and extends to the outer outer part of negative electrode heat radiation of sealing-in lid.
4. organize EL lighting source part according to claim 1 is characterized in that, described anode thermal component and described negative electrode thermal component are by constituting as the conductive coefficient of Al or Cr etc. the thin-film material greater than 50W/mK.
5. organize EL lighting source part according to claim 1 is characterized in that, described anode thermal component and described negative electrode thermal component are that metal (film) material constitutes.
6. organize EL lighting source part according to claim 1 is characterized in that, the thin-film material of described anode thermal component and described negative electrode thermal component comprises Al, Cr, Al-Ag alloy, Ag, Mg-Ag alloy etc.
7. organize EL lighting source part according to claim 1 is characterized in that, described anode thermal component and described negative electrode thermal component lay respectively at the neighboring area of described substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710171108 CN101170162A (en) | 2007-11-28 | 2007-11-28 | Organize EL lighting source part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710171108 CN101170162A (en) | 2007-11-28 | 2007-11-28 | Organize EL lighting source part |
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| Publication Number | Publication Date |
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| CN101170162A true CN101170162A (en) | 2008-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200710171108 Pending CN101170162A (en) | 2007-11-28 | 2007-11-28 | Organize EL lighting source part |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779270A (en) * | 2015-05-08 | 2015-07-15 | 京东方科技集团股份有限公司 | Organic light-emitting diode (OLED) display panel and OLED displayer |
| CN112114455A (en) * | 2019-06-20 | 2020-12-22 | 三星显示有限公司 | Light source component |
-
2007
- 2007-11-28 CN CN 200710171108 patent/CN101170162A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779270A (en) * | 2015-05-08 | 2015-07-15 | 京东方科技集团股份有限公司 | Organic light-emitting diode (OLED) display panel and OLED displayer |
| US9793517B2 (en) | 2015-05-08 | 2017-10-17 | Boe Technology Group Co., Ltd. | Organic light emitting diode display panel and display device |
| CN112114455A (en) * | 2019-06-20 | 2020-12-22 | 三星显示有限公司 | Light source component |
| CN112114455B (en) * | 2019-06-20 | 2024-05-17 | 三星显示有限公司 | Light source component |
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Open date: 20080430 |