Light-Emitting Substrate and Manufacturing Method Therefor, Display Apparatus

A light-emitting substrate, wherein the light-emitting substrate is a top-emission light-emitting substrate and comprises:

• a base substrate;
• a plurality of pixel unit regions located on a side of the base substrate and arranged repeatedly, wherein a pixel unit region comprises:
• at least one blue light-emitting device, wherein a blue light-emitting device comprises a first electrode, at least one blue light-emitting layer and a second electrode that are sequentially stacked in a direction away from the base substrate;
• and
• a first light enhancement layer and a second light enhancement layer that are located on a side of the blue light-emitting device away from the base substrate, wherein the first light enhancement layer is located between the blue light-emitting device and the second light enhancement layer;
• the second light enhancement layer comprises a first inorganic layer, an organic layer and a second inorganic layer that are sequentially stacked in a direction in which the first light enhancement layer is away from the base substrate;
• and
• a light extraction member located on a side of the second light enhancement layer away from the base substrate, wherein an orthographic projection of the light extraction member on the base substrate at least partially overlaps with an orthographic projection of the blue light-emitting device on the base substrate;
• wherein an absolute value of a difference between a wavelength corresponding to a transmittance peak of the light extraction member and a wavelength corresponding to an emission spectrum peak of the blue light-emitting device is less than or equal to 10 nm.