Light-emitting device, display apparatus and manufacturing method

A display apparatus, comprising a light-emitting device, wherein the light-emitting device comprises:

• an anode, a light-emitting layer and a cathode sequentially arranged in a stacking mode;
• and
• an electron transfer layer located between the light-emitting layer and the cathode, wherein the electron transfer layer is configured to enable a difference value between a quantity of electrons reaching the light-emitting layer in unit time and a quantity of holes reaching the light-emitting layer in unit time to be located in a preset threshold range;
• wherein
• a material of the electron transfer layer comprises:
• an inner core and a shell layer wrapping the inner core, wherein the quantity of the electrons reaching the light-emitting layer in unit time is controlled by conductivity of the inner core and conductivity of the shell layer;
• when the quantity of the electrons reaching the light-emitting layer in unit time is greater than the quantity of the holes reaching the light-emitting layer in unit time, and the difference value between the quantity of the electrons reaching the light-emitting layer in unit time and the quantity of the holes reaching the light-emitting layer in unit time exceeds the preset threshold range, a particle size of the inner core is reduced and/or a thickness of the shell layer is increased to enable the difference value between the quantity of the electrons reaching the light-emitting layer in unit time and the quantity of the holes reaching the light-emitting layer in unit time to be located in the preset threshold range;
• and
• when the quantity of the electrons reaching the light-emitting layer in unit time is smaller than the quantity of the holes reaching the light-emitting layer in unit time, and the difference value between the quantity of the electrons reaching the light-emitting layer in unit time and the quantity of the holes reaching the light-emitting layer in unit time exceeds the preset threshold range, the particle size of the inner core is increased and/or the thickness of the shell layer is reduced to enable the difference value between the quantity of the electrons reaching the light-emitting layer in unit time and the quantity of the holes reaching the light-emitting layer in unit time to be located in the preset threshold range.