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公开(公告)号：US10566542B2
公开(公告)日：2020-02-18
申请号：US15541357
申请日：2015-12-22
发明人： Lian Duan , Yong Qiu , Guohui Zhang , Man Li , Dongdong Zhang , Yonglan Hu
摘要： The present invention discloses an organic electroluminescence device, comprising a luminescent layer, wherein, a host material of the luminescent layer comprises a thermally activated delayed fluorescence material, the host material is doped by a dye, and the dye comprises at least one phosphorescent dye. The present invention employs a thermally activated delayed fluorescence material, whose difference between the triplet state energy level and the singlet state energy level (ΔEST) is relatively small. The present invention employs the material as the phosphorescence host, so part of the triplet state exciton level transfers to the singlet state excitons, and the amount of the overall triplet state excitons is smaller. Therefore, the concentration of the triplet state excitons decreases, and the recombination region becomes narrower, which effectively reduces the probability of excitons entering the charge transport layer, and at the same time the narrowing of the recombination region effective prevents the diffusion of N-type dopants into the exciton recombination region. Additionally, by employing the host material, the device corresponds to a low working voltage.
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公开(公告)号：USRE48695E1
公开(公告)日：2021-08-17
申请号：US16412454
申请日：2019-05-15
发明人： Guohui Zhang , Mengzhen Li , Man Li , Lian Duan
摘要： The present invention discloses a transparent OLED device, which comprises a plurality of pixels, each pixel comprising an organic functional layer, a first transparent electrode and a second transparent electrode being disposed on both sides of the organic functional layer, a reflective electrode being disposed on one side of the organic functional layer, the area of the reflective electrode being less than that of the organic functional layer. With regard to the transparent OLED device, by providing a reflective electrode, a combination of a light-emitting device over a microdomain is combined with a transparent light-emitting device, such that the luminance on both sides of a transparent OLED device can be respectively adjusted to be the same or different as required. The present invention can be applied to the field of transparent illumination or display.
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公开(公告)号：US09692006B2
公开(公告)日：2017-06-27
申请号：US15109410
申请日：2014-12-29
发明人： Guohui Zhang , Mengzhen Li , Man Li , Lian Duan
CPC分类号： H01L51/5218 , H01L27/3276 , H01L51/5206 , H01L51/5234 , H01L51/5253 , H01L2251/5323
摘要： The present invention discloses a transparent OLED device, which comprises a plurality of pixels, each pixel comprising an organic functional layer, a first transparent electrode and a second transparent electrode being disposed on both sides of the organic functional layer, a reflective electrode being disposed on one side of the organic functional layer, the area of the reflective electrode being less than that of the organic functional layer. With regard to the transparent OLED device, by providing a reflective electrode, a combination of a light-emitting device over a microdomain is combined with a transparent light-emitting device, such that the luminance on both sides of a transparent OLED device can be respectively adjusted to be the same or different as required. The present invention can be applied to the field of transparent illumination or display.
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