Abstract: A light-emitting layer, a light-emitting device and a light-emitting apparatus are provided. The light-emitting layer includes a thermally activated delayed fluorescence (TADF) material, a phosphorescent material, a multiple resonance fluorescent material and a host material.

Abstract: Provided are an organic compound, a P-type doped material and an application thereof. The organic compound has a structure represented by Formula I, and through a molecular structure design, the organic compound has a lowest unoccupied molecular orbital energy level which is close to an anode work function and a highest occupied molecular orbital energy level of a hole transport layer, effectively promoting the generation of holes. The organic compound has a suitable molecular weight, low volatility and high stability, sufficiently satisfying an evaporation preparation process of OLED devices; moreover, the synthesis method is simple and low cost, achieving large-scale application.

Abstract: Provided are an organic compound, a hole injection material, and an application thereof. The organic compound has a structure as shown in Formula I or Formula II, and has a deep LUMO energy level through the mutual synergy of nuclear structures and substituents, and the LUMO energy level is close to the anode work function and the HOMO energy level of a hole transport layer, which can effectively promote the generation of holes. Meanwhile, the organic compound has a suitable molecular weight, low volatility, high thermal stability, and can satisfy the vacuum evaporation requirements for the OLED device preparation. The organic compound is applied to the OLED device, especially suitable as a P-type dopant for a hole injection layer, which can effectively control the charge balance in the device, significantly reduce the drive voltage of the device, prolong the working life, and enable the device to have higher luminous performance.