Kunshan Go-visionox Opto-electronics Co., Ltd.

Tsinghua University

Other

Guomeng Li

Lian Duan

Dongdong Zhang

Xiaozeng Song

Xiaokang Zhou

Yuewei Zhang

Qiqi Qin

Pengcheng Wei

Yilang Li

Chunliang Yao

The organic electroluminescent device includes a first electrode, a second electrode and an organic layer located between the first electrode and the second electrode, the organic layer includes a light-emitting layer, the light-emitting layer includes a host material, a thermally activated delayed fluorescence sensitizer and a green fluorescent dye, the green fluorescent dye includes a structure as shown in formula I. A thermally activated sensitized fluorescence technique is used, and the green fluorescent dye of a specific structure in combination with the sensitizer and the host material is used, so as to achieve the effects of narrowing the spectrum of a device and improving the green color purity. The efficiency of the organic electroluminescent device is equivalent to that of a phosphorescent green light device, so that a display panel including the organic electroluminescent device has a large display color gamut area.

Organic electroluminescent device, display panel and display device

The present disclosure relates to the field of display technologies, and particularly discloses an organic electroluminescent device. The organic electroluminescent device has a first electrode, a second electrode, and an organic functional layer. The organic functional layer comprises a light-emitting layer. The light-emitting layer comprises at least a host material and a guest material. The host material comprises an exciplex composed of a donor molecule and a receptor molecule, wherein the donor molecule and/or the receptor molecule contains a large steric hindrance substituent group X for increasing an inter-molecular distance between the donor molecule and the receptor molecule, which enables to enhance Foster energy transfer to the guest material molecule, improve device efficiency, inhibit Triplet-Polaron Annihilate Annihilation (TPA), and prolong the device lifetime.

Organic electroluminescent devices

The present application discloses an organic electroluminescent device including a host material and guest material, the host material is an exciplex formed by electron donor material and electron receptor material, the guest material is thermal activated delayed fluorescent material, a singlet energy level of the host material is lower than a singlet energy level of the guest material.

Organic electroluminescent device

The present application discloses an organic electroluminescent device comprising carrier transport layers. The carrier transport layers include an electron transport layer and/or a hole transport layer, at least one of the carrier transport layers is doped with inert material having a refractive index less than 1.5. The present application also provides a manufacturing method of the above-mentioned organic electroluminescent device.

Organic electroluminescent devices and manufacturing methods thereof

Growing community of inventors

Kunshan, China

Guomeng Li