Patent ID: 11972733
Assignee: YUNGU (GU'AN) TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A light-emitting device, wherein a light-emitting color of the light-emitting device is a primary color of either red or green, and the light-emitting device comprises:
a light-emitting layer comprising a host material, and
a compensation layer for carrying holes and disposed on a hole injection side of the light-emitting layer;
wherein the light-emitting device has a starting state and an operating state, and a starting voltage of the light-emitting device in the starting state is lower than an operating voltage of the light-emitting device in the operating state;
wherein, in the starting state, there is a first activation energy difference value ΔEa1 between activation energies of the host material and the compensation layer, and the first activation energy difference value ΔEa1<0 eV;
wherein the light-emitting device further comprises a hole transport layer disposed on the hole injection side of the light-emitting layer, and the compensation layer is disposed between the hole transport layer and the light-emitting layer;
wherein, in the starting state, the activation energy of the compensation layer is higher than activation energies of the hole transport layer and the host material; and
wherein in the starting state, there is a second activation energy difference value ΔEa2 between activation energies of the compensation layer and the hole transport layer, and a value range of the second activation energy difference value ΔEa2 is 0.2 eV˜0.3 eV.