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Light emitting device and display panel

A technology for light-emitting devices and light-emitting layers, which is applied in the manufacturing of semiconductor devices, electric solid-state devices, and semiconductor/solid-state devices, etc., can solve the problems of short service life and low luminous efficiency, and achieves an increase in quantity, luminous efficiency, and service life. Effect

Active Publication Date: 2020-06-16
KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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Problems solved by technology

[0003] However, the existing OLED devices have the problems of low luminous efficiency and short service life.

Method used

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  • Light emitting device and display panel
  • Light emitting device and display panel
  • Light emitting device and display panel

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0029] At present, blue OLED light-emitting devices usually use fluorescent light-emitting materials, which avoids the problems of scarce resources, heavy metal elements and high prices that need to be used when using phosphorescent light-emitting materials. When using a fluorescent light-emitting material, the energy of the singlet excitons in the light-emitting layer in the OLED light-emitting device is transferred to the light-emitting dye to emit light. The quantum ratio of singlet excitons is relatively low, ...

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Abstract

The invention discloses a light emitting device and a display panel. The light-emitting device comprises a first electrode, a light-emitting layer, a carrier transport layer, a carrier barrier layer and a second electrode. The light-emitting layer is arranged between the first electrode and the second electrode; the carrier barrier layer is arranged on at least one side surface of the light-emitting layer, and the carrier transport layer is arranged on one side, far away from the light-emitting layer, of the carrier barrier layer; the light-emitting layer comprises a light-emitting host material and an object material; the materials of the light-emitting host material and the carrier barrier layer can form an exciplex at the interface of the light-emitting layer and the carrier barrier layer; the triplet state energy level of the exciplex is smaller than the triplet state energy levels of the carrier transport layer material and the object material; the singlet energy level of the exciplex is smaller than that of the carrier transport layer material and larger than that of the object material. The light emitting efficiency of the light emitting device can be improved, and meanwhile, the service life of the light emitting device can be prolonged.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a light emitting device and a display panel. Background technique [0002] Organic Light-Emitting Diode (OLED) display technology is widely used in the field of display due to its advantages of self-illumination, wide viewing angle, high contrast ratio, low power consumption and extremely high response speed. [0003] However, the existing OLED devices have the problems of low luminous efficiency and short service life. Contents of the invention [0004] The invention provides a light-emitting device and a display panel to improve the light-emitting efficiency and service life of the light-emitting device. [0005] In the first aspect, an embodiment of the present invention provides a light-emitting device, including a first electrode, a light-emitting layer, a carrier transport layer, a carrier blocking layer, and a second electrode; the light-emit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L27/32
CPCH10K59/00H10K50/11H10K2101/40H10K50/18
Inventor 高宇刘孟宇夏景成
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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