WO2020000692A1 - 有机电致发光器件和有机电致发光装置 - Google Patents
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- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
- H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
Definitions
- the present application relates to the field of display technology, and in particular, to an organic electroluminescent device and an organic electroluminescent device.
- Organic electroluminescence display (English: Organic Light Emitting Display, abbreviated as OLED for short) is an active light-emitting display device, which has the advantages of simple preparation process, low cost, high contrast, wide viewing angle, low power consumption, etc., and is expected to become the next mainstream tablet Display technology is one of the technologies that have attracted the most attention in flat panel display technology.
- FIG. 1 shows a voltage-brightness curve of an RGB three-color sub-pixel in a conventional display device.
- the lighting voltages of the RGB three-color sub-pixels are inconsistent. Specifically, the lighting voltage of the blue light sub-pixel is greater than the lighting voltage of the green light sub-pixel is greater than the lighting voltage of the red light pixel.
- the blue sub-pixel is lit, although the voltage is mainly across the blue sub-pixel, due to the better conductivity of the common hole injection layer, some of the carriers generated in the blue sub-pixel will pass through.
- the common hole injection layer migrates into the green photo sub-pixel and / or the red photo sub-pixel.
- the red photo sub-pixel and / or the green photo sub-pixel are easily lit at the same time. That is, in the case of low gray levels, the light emission brightness of the red and / or green sub-pixels cannot strictly achieve the low-brightness display effect according to requirements, and a low gray-scale color cast (reddish) phenomenon occurs.
- An embodiment of the present application provides an organic electroluminescence device, which includes a first electrode layer, a first carrier function layer, a light emitting layer, and a second electrode layer that are sequentially stacked and stacked, the first carrier function layer and A P-doped layer is further provided between the light-emitting layers.
- the light emitting layer is a blue light emitting layer
- the first carrier function layer is close to the blue light emitting layer and is doped with a material in the blue light emitting layer.
- the P-doped layer includes a first base material and a first doped material, and the first base material is the same as a material of the first carrier functional layer.
- the first doping material is a P dopant.
- the doping concentration of the P dopant in the P doped layer is 1 wt% to 10 wt%.
- the doping concentration of the P dopant in the P doped layer is 1 wt% to 5 wt%.
- the thickness of the P-doped layer is 1 nm-10 nm.
- the first carrier function layer is an electron blocking layer, a hole transport layer, or a hole injection layer.
- a second carrier function layer is provided between the light emitting layer and the second electrode layer, and an N-doped layer is provided between the second carrier function layer and the light emitting layer.
- the N-doped layer includes a second base material and a second doped material, the second base material is the same as the second carrier functional layer material, and the second doped material is N dopant.
- the second carrier function layer is a hole blocking layer, an electron transport layer, or an electron injection layer.
- the P-doped layer is formed by evaporating the first doping material together with the first base material, or the first doping material is mixed with the first base material in a pre-mixing manner, and then sprayed. Formed by ink printing process.
- An embodiment of the present application further provides an organic electroluminescence device including a plurality of pixel units distributed in an array, and each of the pixel units includes a red photo sub-pixel unit, a green photo sub-pixel unit, and a blue photo sub-pixel unit.
- Each pixel unit includes a stacked first electrode layer, a light emitting layer, and a second electrode layer.
- the light emitting layers in the red, green, and blue sub-pixel units are respectively a red light-emitting layer and a green light-emitting layer.
- the turn-on voltage difference between the blue light sub-pixel unit and the red light sub-pixel unit is not greater than 0.2V, and the turn-on voltage difference between the blue light sub-pixel unit and the green photo sub-pixel unit is not greater than 0.2 V.
- the process of lighting the organic electroluminescent device is to apply a certain driving voltage to the first electrode layer and the second electrode layer, so that the carriers are transmitted to the light emitting layer across the potential barrier, and finally the composite light is emitted in the light emitting layer.
- the magnitude of the potential barrier between the light-emitting layer, the first electrode layer, and the second electrode layer is an important factor determining the magnitude of the driving voltage. That is, as the potential barrier increases, the driving voltage required to be applied to the first electrode layer and the second electrode layer also increases; conversely, the potential barrier decreases, and the driving to be applied to the first electrode layer and the second electrode layer is required. The voltage will decrease accordingly.
- the organic electroluminescence device provided in the embodiment of the present application includes a first electrode layer, a first carrier functional layer, a light emitting layer, and a second electrode layer that are sequentially stacked and stacked, between the first carrier functional layer and the light emitting layer.
- a P-doped layer is also provided.
- the arrangement of the first carrier function layer helps to improve the mobility of the carriers provided by the first electrode layer to the light-emitting layer. A higher carrier mobility can effectively reduce the lighting voltage of the device and improve the device's Luminous efficiency.
- a P-doped layer is further provided between the first carrier functional layer and the light emitting layer, so that the energy level of the interface between the first carrier functional layer and the light emitting layer can be changed, and the interface between the two can be reduced.
- the hole injection potential barrier at this location effectively reduces the lighting voltage of the organic electroluminescent device.
- the lighting voltage difference between the organic electroluminescence device and the adjacent organic electroluminescence device can be reduced, so that when the organic electroluminescence device of the light emitting color is turned on separately, The generated carriers will not illuminate other organic electroluminescent devices even if they are applied to the organic electroluminescent devices of other emitting colors through a common carrier functional layer, which solves the problem of color cast and improves display quality.
- the P-doped layer includes a first base material and a first doped material.
- the first base material is the same as the material of the first carrier functional layer.
- the first doped material Is a P dopant.
- Using the same material as the first carrier functional layer material as the first base material can help improve the energy level matching between the first carrier functional layer and the P-doped layer, and reduce the first carrier.
- the energy level difference between the functional layer and the P-doped layer reduces the injection barrier at the interface between the first carrier functional layer and the P-doped layer.
- the first carrier function layer is an electron blocking layer or a hole transporting layer or a hole injection layer, that is, a P doping can be provided between the electron blocking layer and the light emitting layer.
- Layer, or a P-doped layer between the hole-transporting layer and the light-emitting layer, or a P-doped layer between the hole-injection layer and the light-emitting layer, which has more selectivity and flexibility, and no matter which one is selected Both can achieve the purpose of this application.
- a second carrier function layer is provided between the light emitting layer and the second electrode layer, and an N-doped layer is provided between the second carrier function layer and the light emitting layer.
- the arrangement of the second carrier function layer is helpful to improve the mobility of the carriers provided by the second electrode layer to the light emitting layer, further reduce the lighting voltage of the device, and improve the light emitting efficiency of the device.
- an N-doped layer is further provided between the second carrier functional layer and the light-emitting layer, so that the energy level of the interface between the second carrier functional layer and the light-emitting layer can be changed, and the interface between the two can be reduced.
- the electron-injection barrier at the region further reduces the lighting voltage of the organic electroluminescent device.
- each pixel unit includes a red light sub-pixel unit, a green light sub-pixel unit, and a blue light sub-pixel unit, and each sub-pixel unit includes a first electrode layer and a light-emitting layer that are stacked. And a second electrode layer.
- the blue light sub-pixel unit includes a first electrode layer, a first carrier function layer, a blue light emitting layer, and a second electrode layer, which are sequentially stacked. The first carrier functional layer and the blue light emitting layer in the blue light sub pixel unit. A P-doped layer is also provided therebetween.
- the lighting voltage of the blue light sub-pixel unit is greater than the lighting voltage of the red and green photo sub-pixel units.
- the blue light sub-pixel unit is lit separately, although the driving voltage is mainly across the blue photon On the pixel unit, but the generated carriers will be applied to the green and / or red photon pixel unit through the common carrier function layer. Because the green and / or red photon pixel unit has a lower lighting voltage, it is easy to Lights up, causing color cast problems.
- a P-doped layer is provided between the first carrier functional layer and the light-emitting layer in the blue light sub-pixel unit, which is helpful to change the first carrier functional layer.
- the energy level at the interface with the light-emitting layer is bent, which reduces the hole injection barrier at the interface between the two, thereby effectively reducing the lighting voltage of the blue sub-pixel unit.
- the lighting voltage difference between the blue light sub-pixel unit and the red light and green light sub-pixel units is reduced, so that when the blue light sub-pixel unit is turned on separately, some of the carriers migrate to red even through the common carrier function layer
- the light and green sub-pixel units are not enough to light up the red and green sub-pixel units, which solves the problem of color cast and improves the display quality.
- FIG. 1 is a voltage-brightness curve diagram of RGB three-color sub-pixels in a full-color display device with pixel juxtaposition;
- FIG. 2 is a schematic structural diagram of an organic electroluminescent device according to an embodiment of the present application.
- FIG. 3 is a schematic structural diagram of an organic electroluminescence device according to an embodiment of the present application.
- connection or integral connection; can be mechanical or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements, it can be wireless or wired connection.
- connection or integral connection; can be mechanical or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements, it can be wireless or wired connection.
- the organic electroluminescent device includes a first electrode layer 1, a first carrier functional layer 2, a light emitting layer 4, and a second electrode layer 7.
- the first electrode layer 1 is an anode
- the second electrode layer 7 is a cathode, or the first electrode layer 1 is a cathode, and the second electrode layer 7 is an anode.
- the following description uses the first electrode layer 1 as an anode and the second electrode layer 7 as a cathode for example.
- the process of lighting the organic electroluminescent device is to apply a certain driving voltage to the first electrode layer 1 and the second electrode layer 7, so that the carriers are transmitted to the light emitting layer 4 across the barrier, and finally emit light.
- Layer 4 emits light in combination.
- the magnitude of the potential barrier between the light emitting layer 4 and the first electrode layer 1 and the second electrode layer 7 is an important factor determining the magnitude of the driving voltage. That is, as the potential barrier increases, the driving voltage that needs to be applied to the first electrode layer 1 and the second electrode layer 7 also increases; conversely, the potential barrier decreases and needs to be applied to the first electrode layer 1 and the second electrode The driving voltage of layer 7 will also decrease accordingly.
- the arrangement of the first carrier function layer 2 helps to improve the mobility of the carriers provided by the first electrode layer 1 to the light emitting layer 4, and a higher carrier mobility can effectively reduce the device To increase the light-emitting efficiency of the device.
- the first electrode layer 1 is an anode, that is, the first carrier functional layer 2 improves the mobility of holes.
- a P-doped layer 3 is further provided between the first carrier functional layer 2 and the light-emitting layer 4, so that the energy level at the interface between the first carrier functional layer 2 and the light-emitting layer 4 can be changed. Bending reduces the hole injection barrier at the interface between the two, thereby effectively reducing the lighting voltage of the organic electroluminescent device.
- the lighting voltage difference between the organic electroluminescence device and the adjacent organic electroluminescence device can be reduced, so that when the organic electroluminescence device of the light emitting color is turned on separately, The generated carriers will not illuminate other organic electroluminescent devices even if they are applied to the organic electroluminescent devices of other emitting colors through a common carrier functional layer, which solves the problem of color cast and improves display quality.
- the light emitting layer 4 in the organic electroluminescent device is a blue light emitting layer.
- the lighting voltage of the blue organic electroluminescent device is greater than the lighting voltage of the red organic electroluminescent device and the green organic electroluminescent device.
- the blue organic electroluminescence device is lit individually, although the driving voltage is mainly across the blue organic electroluminescence device, some of the carriers will migrate to adjacent green light and / or through the common carrier function layer
- the green light and / or red light organic electroluminescent device has a low start-up voltage, which is sufficient to be lighted, causing a problem of color cast.
- the light emitting layer 4 is set as a blue light emitting layer, that is, the device belongs to a blue light organic electroluminescent device. That is, the carrier functional layer near the blue light emitting layer is doped with the material in the blue light emitting layer, which improves the matching between the energy level of the blue light emitting layer and the energy level of the carrier functional layer near it, reducing The small energy level difference between the two reduces the carrier injection barrier, thereby effectively reducing the lighting voltage of the blue organic electroluminescent device.
- the difference in the lighting voltage between the blue organic electroluminescent device and the red and green organic electroluminescent devices is reduced, so that when the blue organic electroluminescent device is turned on separately, some carriers even
- the migration of the common carrier functional layer into the red and green organic electroluminescent devices is not enough to light up the red and green organic electroluminescent devices, which solves the problem of color misregistration and improves the display quality.
- the P-doped layer 3 includes a first base material 31 and a first doped material 32.
- the first base material 31 is the same as the material of the first carrier functional layer 2.
- the first doping material 32 is a P dopant.
- Using the same material as that of the first carrier functional layer 2 as the first base material 31 helps to improve the energy level matching between the first carrier functional layer 2 and the P-doped layer 3 and reduce the The energy level difference between a carrier functional layer 2 and the P-doped layer 3 reduces the injection barrier at the interface between the first carrier functional layer 2 and the P-doped layer 3.
- the first doped material and the first base material may be evaporated together in a co-evaporation manner to form a P-doped layer. It is also possible to premix the first doping material and the first base material in a pre-mixing manner, and then use an inkjet printing process to form a P-doped layer.
- the P dopant may be selected from at least one of NDP-9, TCNQ, F4-TCNQ, PPDN, and the like.
- the doping concentration of the P dopant in the P doped layer 3 is 0.1 wt% to 10 wt%, and more preferably 1 wt% to 5 wt%. That is, by adjusting the doping ratio of the P dopant in the P-doped layer 3, the potential barrier at the interface between the first carrier functional layer 2 and the light-emitting layer 4 can be adjusted, and then the lighting of the organic electroluminescent device can be adjusted. Voltage.
- the thickness of the P-doped layer 3 is 0.5 nm-10 nm.
- the first carrier functional layer 2 is an electron blocking layer, a hole transporting layer, or a hole injection layer. That is, a P doped layer 3 may be provided between the electron blocking layer and the light emitting layer 4, or a P doped layer 3 may be provided between the hole transport layer and the light emitting layer 4, or between the hole injection layer and the light emitting layer 4.
- the P doped layer 3 is arranged in between, which has more selectivity and strong flexibility, and the purpose of the present application can be achieved no matter which method is selected.
- the first carrier functional layer 2 is preferably an electron blocking layer.
- a second carrier function layer 6 is provided between the light emitting layer 4 and the second electrode layer 7, and a second carrier function layer 6 and the light emitting layer 4 are provided.
- the provision of the second carrier function layer 6 helps to improve the mobility of the carriers provided by the second electrode layer 7 to the light emitting layer 4, further reduce the lighting voltage of the device, and improve the light emitting efficiency of the device.
- an N-doped layer 5 is further provided between the second carrier functional layer 6 and the light-emitting layer 4, so that the energy level bending at the interface between the second carrier functional layer 6 and the light-emitting layer 4 can be changed. , Reduce the electron injection barrier at the interface between the two, and further reduce the lighting voltage of the organic electroluminescent device.
- the N-doped layer 5 includes a second base material 51 and a second doped material 52, and the second base material 51 and the second carrier functional layer 6 are the same material.
- the second doping material 52 is an N dopant.
- Using the same material as that of the second carrier functional layer 6 as the second base material 51 helps to improve the energy level matching between the second carrier functional layer 6 and the N-doped layer 5 and reduce the The energy level difference between the second carrier functional layer 6 and the N-doped layer 5 reduces the injection barrier at the interface between the second carrier functional layer 6 and the N-doped layer 5.
- the second doping material and the second base material may be evaporated together by a co-evaporation method to form an N-doped layer. It is also possible to pre-mix the second doping material and the second base material in a pre-mixing manner, and then use an inkjet printing process to form an N-doped layer.
- the N dopant may be selected from at least one of NTCDA, PTCDA, LiF, Li, Cs, Cs 2 CO 3 , and Li 2 CO 3 .
- An embodiment of the present application further provides an organic electroluminescence device including a plurality of pixel units distributed in an array.
- each pixel unit includes a red photo sub-pixel unit 8, a green photo sub-pixel unit 9, and a blue photo sub-pixel.
- Unit 10 each of the sub-pixel units includes a first electrode layer 1, a light-emitting layer 4, and a second electrode layer 7, which are stacked, a light-emitting layer in the red, green, and blue sub-pixel units 8, 9, and 10 4 are red light emitting layer, green light emitting layer and blue light emitting layer;
- the blue sub-pixel unit 10 includes a first electrode layer 1, a first carrier function layer 2, a blue light-emitting layer, and a second electrode layer 7 that are sequentially stacked.
- the first carrier function of the blue sub-pixel unit 10 A P-doped layer 3 is also provided between the layer 2 and the blue light-emitting layer
- the turn-on voltage of the blue light sub-pixel unit 10 is greater than the turn-on voltage of the red light sub-pixel unit 8 and the green light sub-pixel unit 9.
- the blue light sub-pixel unit 10 is individually lit, although the driving voltage is mainly across the blue light sub-pixel unit 10, but the generated carriers will be applied to the green and / or red photo sub-pixel unit 8 through the common carrier function layer. Because the green and / or red photo sub-pixel unit 8 has a lower lighting voltage, Easy to be lit, causing color cast problems.
- Providing a P-doped layer 3 between the first carrier functional layer 2 and the light-emitting layer 4 in the blue sub-pixel unit 10 helps to change the energy level bending of the interface between the first carrier functional layer 2 and the light-emitting layer 4. , Reducing the hole injection barrier at the interface between the two, thereby effectively reducing the lighting voltage of the blue sub-pixel unit 10. Furthermore, the lighting voltage difference between the blue light sub-pixel unit 10 and the red light and green light sub-pixel units 9 is reduced, so that when the blue light sub-pixel unit 10 is turned on separately, some carriers even pass through a common carrier function layer Migration to the red and green sub-pixel units is not enough to light up the red and green sub-pixel units 9, which solves the problem of color cast and improves the display quality.
- the turn-on voltage difference between the blue light sub-pixel unit 10, the red light sub-pixel unit 8, and the green light sub-pixel unit 9 is not greater than 0.2V. Therefore, the turn-on voltage difference between the three pixel sub-pixel units is sufficiently small to ensure that when the blue sub-pixel unit 10 is turned on, the red sub-pixel unit 8 and the green sub-pixel unit 9 cannot be turned on, and the color shift is resolved. Problems to improve display quality.
- An embodiment of the present application provides a specific organic electroluminescence device, including a plurality of pixel units distributed in an array, and each pixel unit includes a red photo sub-pixel unit 8, a green photo sub-pixel unit 9, and a blue photo sub-pixel unit 10.
- Each sub-pixel unit includes a first electrode layer 1 (anode), a first carrier functional layer 2 (electron blocking layer), a light emitting layer 4, and a second carrier functional layer 6 (hole blocking layer) arranged in a stack. ) And the second electrode layer 7 (cathode), the light emitting layers 4 in the red, green, and blue light sub-pixel units 8, 9, and 10 are respectively a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer.
- a P-doped layer 3 is provided between the electron blocking layer and the blue light emitting layer in the blue light sub-pixel unit 10.
- the P doped layer 3 includes a first base material TPD and a P dopant NDP-9.
- the doping concentration of the P dopant in the P doped layer 3 is 5 wt%, and the thickness of the P doped layer 3 is 6 nm.
- the device structure of the blue light sub-pixel unit 10 is:
- ITO 100 nm
- TPD 5 nm
- TPD NDP-9 (5%, 6 nm)
- CBP BCzVBI (3%, 30 nm) / NPB (5 nm) / Mg: Ag (20%, 15 nm).
- the embodiment of the present application provides a specific organic electroluminescence device, which is basically the same as the organic electroluminescence device described in Embodiment 3. The only difference is that:
- the doping concentration of the P dopant in the P doped layer 3 is 1% by weight.
- the embodiment of the present application provides a specific organic electroluminescence device, which is basically the same as the organic electroluminescence device described in Embodiment 3. The only difference is that:
- the doping concentration of the P dopant in the P doped layer 3 is 10% by weight.
- the embodiment of the present application provides a specific organic electroluminescence device, which is basically the same as the organic electroluminescence device described in Embodiment 3. The only difference is that:
- the thickness of the P-doped layer 3 is 1 nm.
- the embodiment of the present application provides a specific organic electroluminescence device, which is basically the same as the organic electroluminescence device described in Embodiment 3. The only difference is that:
- the thickness of the P-doped layer 3 is 10 nm.
- the comparative example of this application provides a specific organic electroluminescence device, which is basically the same as the organic electroluminescence device described in Example 3. The only difference is that:
- the first base material 31 in the P-doped layer 3 is NPB.
- the comparative example of this application provides a specific organic electroluminescence device, which is basically the same as the organic electroluminescence device described in Example 3. The only difference is that:
- the doping concentration of the P dopant in the P doped layer 3 is 15% by weight.
- the comparative example of this application provides a specific organic electroluminescence device, which is basically the same as the organic electroluminescence device described in Example 3. The only difference is that:
- the thickness of the P-doped layer 3 is 20 nm.
- the comparative example of this application provides a specific organic electroluminescence device, which is basically the same as the organic electroluminescence device described in Example 3. The only difference is that:
- the P-doped layer 3 is not included between the electron blocking layer and the light-emitting layer 4 in the blue light sub-pixel unit 10.
- the device structure of the blue light sub-pixel unit 10 is:
- ITO 100 nm
- TPD 5 nm
- CBP BCzVBI
- NPB 5 nm
- Mg Ag (20%, 15 nm).
- the organic electroluminescence device provided in the present application is provided with a P-doped layer between the first carrier function layer and the light-emitting layer in the blue light sub-pixel unit, which is helpful for changing the first carrier function.
- the energy level of the interface between the layer and the light-emitting layer is curved, which reduces the hole injection barrier at the interface between the two layers, thereby effectively reducing the lighting voltage of the blue sub-pixel unit.
- the lighting voltage difference between the blue light sub-pixel unit and the red light and green light sub-pixel units is reduced, so that when the blue light sub-pixel unit is turned on separately, some of the carriers migrate to red even through the common carrier function layer
- the light and green sub-pixel units are not enough to light up the red and green sub-pixel units, which solves the problem of color cast and improves the display quality.
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Abstract
Description
Claims (14)
- 一种有机电致发光器件,包括依次层叠设置的第一电极层、第一载流子功能层、发光层以及第二电极层,所述第一载流子功能层和所述发光层之间还设置有P掺杂层。
- 根据权利要求1所述的有机电致发光器件,其中,所述发光层为蓝光发光层,所述第一载流子功能层靠近所述蓝光发光层且掺杂有蓝光发光层中的材料。
- 根据权利要求1所述的有机电致发光器件,其中,所述P掺杂层中包括第一基体材料和第一掺杂材料,所述第一基体材料与所述第一载流子功能层的材料相同。
- 根据权利要求2所述的有机电致发光器件,其中,所述第一掺杂材料为P掺杂剂。
- 根据权利要求4所述的有机电致发光器件,其中,所述P掺杂层中P掺杂剂的掺杂浓度为0.1wt%-10wt%。
- 根据权利要求4所述的有机电致发光器件,其中,所述P掺杂层中P掺杂剂的掺杂浓度为1wt%-5wt%。
- 根据权利要求1所述的有机电致发光器件,其中,所述P掺杂层的厚度为0.5nm-10nm。
- 根据权利要求1所述的有机电致发光器件,其中,所述第一载流子功能层为电子阻挡层或空穴传输层或空穴注入层。
- 根据权利要求1所述的有机电致发光器件,其中,所述发光层和所述第二电极层之间设置有第二载流子功能层,所述第二载流子功能层和所述发光层之间设置有N掺杂层。
- 根据权利要求9所述的有机电致发光器件,其中,所述N掺杂层中包括第二基体材料和第二掺杂材料,所述第二基体材料与所述第二载流子功能层材料相同,所述第二掺杂材料为N掺杂剂。
- 根据权利要求9所述的有机电致发光器件,其中,所述第二载流子功能层为空穴阻挡层或电子传输层或电子注入层。
- 根据权利要求1所述的有机电致发光器件,其中,所述P掺杂层通过第一掺杂材料与第一基体材料一同蒸镀形成,或者,采用预混合的方式将第一掺杂材料与第一基体材料混合,然后再采用喷墨打印工艺形成。
- 一种有机电致发光装置,包括阵列分布的若干像素单元,各所述像素单元中均包括红光子像素单元、绿光子像素单元和蓝光子像素单元,各所述子像素单元中均包括堆叠设置的第一电极层、发光层以及第二电极层,所述红光子像素单元、绿光子像素单元和蓝光子像素单元中的发光层分别为红光发光层、绿光发光层和蓝光发光层;所述蓝光子像素单元包括依次层叠设置的第一电极层、第一载流子功能层、蓝光发光层以及第二电极层,所述蓝光子像素单元的第一载流子功能层和蓝光发光层之间还设置有P掺杂层。
- 根据权利要求13所述的有机电致发光装置,其中,所述蓝光子像素单元与所述红光子像素单元之间的开启电压差不大于0.2V,所述蓝光子 像素单元与所述绿光子像素单元之间的开启电压差不大于0.2V。
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