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1. 发明公开

EP3392911A1 ORGANIC LIGHT-EMITTING DISPLAY DEVICE AND DISPLAY APPARATUS 有权
公开(公告)号：EP3392911A1
公开(公告)日：2018-10-24
申请号：EP16874744.2
申请日：2016-12-02
申请人： Kunshan New Flat Panel Display Technology Center Co. Ltd , Kunshan Go-Visionox Opto-Electronics Co., Ltd.
发明人： LI, Weiwei , LIU, Song , XIE, Jing , MIN, Chao , ZHAO, Fei , GAO, Song
IPC分类号： H01L27/32
CPC分类号： H01L27/32 , H01L51/0061 , H01L51/0067 , H01L51/0072 , H01L51/5004 , H01L51/5028 , H01L51/5064
摘要： An organic light-emitting display device (100). A functional structure layer (130) of the organic light-emitting display device (100) comprises a hole injection layer (131), a first hole transport layer (1321), a second hole transport layer (1322), an organic light-emitting layer (133), an electron transport layer (134) and an electron injection layer (135) which are sequentially laminated on a first electrode (110). The highest occupied orbital energy level of the material of the first hole transport layer (1321) is less than the highest occupied orbital energy level of the second hole transport layer (1322). A triplet state energy level of the material of the second hole transport layer (1322) is greater than 2.5 eV. The organic light-emitting layer (133) comprises a main light-emitting material, and the main light-emitting material comprises a thermal activation delay fluorescent material. The organic light-emitting display device (100) adopts two hole transport layers, wherein the second hole transport layer (1322) acts as both an electron blocking layer and an optical compensation layer, and matches the thermal activation delay fluorescent material in the organic light-emitting layer (133), thereby improving the current efficiency and service life of the organic light-emitting display device (100).

2. 发明公开

EP3364459A1 ORGANIC ELECTROLUMINESCENT DEVICE 有权
公开(公告)号：EP3364459A1
公开(公告)日：2018-08-22
申请号：EP16877560.9
申请日：2016-11-30
申请人： Kunshan New Flat Panel Display Technology Center Co., Ltd.
发明人： GAO, Song , LIU, Song , ZHAO, Fei
IPC分类号： H01L27/32 , H01L51/50
摘要： An organic electroluminescent device adopts a TADF material as a first host material (6) of a green light unit (302) to sensitize a green phosphorescent material serving as a first guest material (7). A portion of triplet excitons are converted into singlet excitons through inverse gap crossing, and thus decrease of the triplet exciton concentration results in narrowing of the recombination region, thereby preventing the triplet excitons from diffusing into a blue light layer (4) to emit light, so as to realize a green light spectrum containing no blue light component. And because an energy level difference between red light and blue light is relatively large, carriers in a red light unit cannot be easily transferred to the blue light layer, and therefore it is not easy for a blue light component to appear in a red light spectrum. Accordingly, the light-emitting spectrums of red/green subpixels in the organic electroluminescent device with a shared blue light layer do not contain blue light, thereby effectively broaden the range of applicable combinations of luminescent materials and improving the display performance of the device. Moreover, a hole-blocking layer is not required, and thus the structure of the device is effectively simplified, and the operation voltage is lowered; in the meantime, the process difficulty is reduced, and the product yield is increased, thereby reducing the production cost.

3. 发明公开

EP3471165A1 ELECTRODE AND ORGANIC ELECTROLUMINESCENT COMPONENT APPLYING SAME 审中-公开
公开(公告)号：EP3471165A1
公开(公告)日：2019-04-17
申请号：EP18736549.9
申请日：2018-01-05
申请人： Kunshan New Flat Panel Display Technology Center Co., Ltd. , Kunshan Go-Visionox Opto-Electronics Co., Ltd.
发明人： ZHAO, Fei , LI, Weiwei , MIN, Chao , LUO, Zhizhong
IPC分类号： H01L51/52
摘要： The present invention pertains to the field of electroluminescence, and particularly relates to an electrode and an organic electroluminescent device using the same. The electrode comprises a first layer (1) and a second layer (2) arranged in a stacked manner. The first layer (1) is an alkali earth metal alloy layer, and the second layer (2) has a work function of 2.0eV to 3.5eV. The composite layered electrode with a gradient of work function has very good stability, which can effectively prolong the service life of the device. The work function of the second layer (2) is only 2.0eV to 3.5eV, which can effectively reduce the barrier potential of the organics-metal interface, and in the meantime, the composite electrode structure with a gradient of work function can lower the electron injection barrier potential in a step-by-step manner, thereby providing orderly guidance for electron injection, so that the light-emitting efficiency of the device is improved.

4. 发明授权

EP3364459B1 ORGANIC ELECTROLUMINESCENT DEVICE 有权
公开(公告)号：EP3364459B1
公开(公告)日：2019-12-18
申请号：EP16877560.9
申请日：2016-11-30
申请人： Kunshan New Flat Panel Display Technology Center Co., Ltd.
发明人： GAO, Song , LIU, Song , ZHAO, Fei
IPC分类号： H01L51/50 , H01L51/54 , H01L27/32

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