公开(公告)号：US12178061B2

公开(公告)日：2024-12-24

申请号：US17600278

申请日：2020-11-30

Applicant: BOE Technology Group Co., Ltd.

Inventor： Xiaojin Zhang ,  Huiyun Yang ,  Changho Lee

IPC: H10K50/12 ,  H10K101/20 ,  H10K101/30

Abstract: The disclosure relates to an organic light emitting diode, a method for manufacturing the same, and a display panel. The organic light emitting diode includes: a first electrode; a second electrode disposed opposite to the first electrode; a light-emitting layer between the first electrode and the second electrode; the light-emitting layer includes a first light-emitting sub-layer and a second light-emitting sub-layer; the first light-emitting sub-layer includes a host material, a TADF sensitizer and a fluorescent guest material; the second light-emitting sub-layer includes the host material or includes the host material and the TADF sensitizer. The light-emitting layer of the organic light emitting diode of the present disclosure includes the first light-emitting sub-laver and the second light-emitting sub-layer, and thus the luminous efficiency of the red light-emitting device, the green light-emitting device, and the blue light-emitting device can be harmonized by effectively adjusting a thickness of the second light-emitting sub-layer.

公开(公告)号：US12295198B2

公开(公告)日：2025-05-06

申请号：US17635705

申请日：2021-04-16

Applicant: BOE Technology Group Co., Ltd.

Inventor： Xiaojin Zhang ,  Huiyun Yang ,  Yong Wu ,  Dan Wang

IPC: H01L51/50 ,  H10K50/12 ,  H10K85/30 ,  H10K85/60 ,  H10K101/00 ,  H10K101/25 ,  H10K101/30 ,  H10K102/00

Abstract: The embodiments of the disclosure provide an organic electroluminescent device, including an anode, a cathode, an emitting layer arranged between the anode and the cathode, and an assistant luminescent layer located on one side, facing the anode, of the emitting layer. The assistant luminescent layer includes a first host material and a first fluorescent guest material. The emitting layer includes a second host material, a TADF material, and a second fluorescent guest material. The first host material and the first fluorescent guest material satisfy: S1(B)−T1(B)>0.2 eV; S1(B)>S1(C); T1(B)>T1(C); ∥HOMO(B)−LUMO(C)|−S1(C)|≤0.2 eV. The lowest singlet state energy of the first host material is S1(B), and the lowest triplet state energy is T1(B). The lowest singlet state energy of the first fluorescent guest material is S1(C), and the lowest triplet state energy is T1(C).

公开(公告)号：US12256592B2

公开(公告)日：2025-03-18

申请号：US17509788

申请日：2021-10-25

Applicant: Chengdu BOE Optoelectronics Technology Co., Ltd. ,  BOE Technology Group Co., Ltd.

Inventor： Huiyun Yang ,  Xiaojin Zhang ,  Haiyan Sun

IPC: H01L51/50 ,  H01L51/56 ,  H10K50/12 ,  H10K71/00 ,  H10K101/30 ,  H10K102/00

Abstract: Provided is an organic light emitting device, including a p-type host layer, an n-type host layer, and an interlayer disposed between the p-type host layer and the n-type host layer, wherein at least one of the p-type host layer and the n-type host layer includes a fluorescent dopant, and a preset distance is present between the fluorescent dopant and the interlayer; the p-type host layer and the n-type host layer are configured to form, together with the interlayer, a spatially separated exciplex under an action of driving voltage; and the fluorescent dopant is configured to absorb energy of singlet excitons generated by the exciplex to emit light.