Boe Technology Group Co., Ltd.

Beijing Boe Technology Development Co., Ltd.

Xinghua Liu

Xiaojin Zhang

Haiyan Sun

Changho Lee

Huiyun Yang

A light-emitting device includes a first light-emitting layer and a second light-emitting layer that are stacked. A material of the first light-emitting layer includes a first host material and a first TADF sensitizer. A material of the second light-emitting layer includes a second host material, a second TADF sensitizer, and a second fluorescent emissive material. Transmission rates of the material of the first light-emitting layer and the material of the second light-emitting layer to holes are greater than transmission rates of the material of the first light-emitting layer and the material of the second light-emitting layer to electrons, and there is a first overlapping region between a normalized electroluminescence spectrum of the first TADF sensitizer and a normalized absorption spectrum of the second fluorescent emissive material.

Light-emitting device and method for manufacturing the same, light-emitting substrate and light-emitting apparatus

The present disclosure relates to an organic light emitting device, a display device, a preparation method, a storage medium and a computer equipment. The organic light emitting device includes an anode, an organic layer and a cathode, in which the organic layer includes a hole injection layer, a hole transport layer, an electron blocking layer, an organic light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer, which are sequentially arranged in a stack on the anode, in which the hole injection layer includes a first host material and a first doping material doped in the first host material, a doping concentration of the first doping material gradually decreases in a direction away from the anode, and a doping ratio of the first doping material in the hole injection layer is less than or equal to 6%.

Organic light emitting device having hole injection layer with doping concentration of first doping material gradually decreasing in direction away from anode, display device, preparation method and storage medium

Organic luminescent material, includes: host material, TADF sensitizer, and fluorescent-luminescent material; wherein absolute value of difference between LUMO level of the host material and LUMO level of the TADF sensitizer is not more than 0.4 eV, and absolute-value of difference between HOMO level of the host material and HOMO level of the TADF sensitizer is not more than 0.4 eV; absolute-value of LUMO level of the fluorescent-luminescent material is not more than absolute-value of the LUMO level of the host material and the LUMO level of the TADF sensitizer, and/or absolute-value of HOMO level of the fluorescent-luminescent material is not less than an absolute-value of the HOMO level of the host material and absolute-value of the HOMO level of the TADF sensitizer; and emission-spectrum of the host material overlaps an absorption-spectrum of the TADF sensitizer, and emission-spectrum of the TADF sensitizer overlaps absorption-spectrum of the fluorescent-luminescent material.

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Beijing, China

Xinghua Liu