Array substrate and manufacturing method thereof, display device

An array substrate comprising:

• a base substrate comprising a plurality of sub-pixels arranged in an array;
• a first electrode layer on the base substrate;
• a pixel defining layer on the base substrate and between any two adjacent sub-pixels of the plurality of sub-pixels, the pixel defining layer comprising a sidewall and a top surface on a side away from the base substrate;
• an electron transport layer on a side of the first electrode layer away from the base substrate, the electron transport layer being arranged in the plurality of sub-pixels and covering the sidewall and the top surface of the pixel defining layer;
• a patterned metal oxide layer on a side of the electron transport layer away from the base substrate and in the plurality of sub-pixels, a portion of the metal oxide layer in any one of the plurality of sub-pixels being spaced apart from a portion of the metal oxide layer in another sub-pixel adjacent to the any one of the plurality of sub-pixels by the pixel defining layer, the metal oxide layer comprising at least one of magnesium element or calcium element;
• a patterned light-emitting layer on a side of the metal oxide layer away from the base substrate and in the plurality of sub-pixels;
• a hole transport layer on a side of the light-emitting layer away from the base substrate;
• a hole injection layer on a side of the hole transport layer away from the base substrate;
• and
• a second electrode layer on a side of the hole injection layer away from the base substrate.

A method of manufacturing an array substrate comprising:

• providing a base substrate that comprises a plurality of sub-pixels arranged in an array;
• and
• forming a patterned metal oxide layer on the base substrate and forming a patterned light-emitting layer on a side of the metal oxide layer away from the base substrate,
• wherein the metal oxide layer comprises at least one of magnesium element or calcium element, both the metal oxide layer and the light-emitting layer are in the plurality of sub-pixels, and a portion of the metal oxide layer in any one of the plurality of sub-pixels is spaced apart from a portion of the metal oxide layer in another sub-pixel adjacent to the any one of the plurality of sub-pixels, and
• wherein the light-emitting layer comprises a photosensitive material and is in contact with the metal oxide layer.