A method for manufacturing an array substrate, comprising: forming a pixel defining layer having a plurality of accommodating wells over a substrate, wherein a side wall of each of the plurality of accommodating wells comprises a hydrophilic side surface; and forming a hydrophobic material layer over the pixel defining layer, such that the hydrophilic side surface is partially covered by the hydrophobic material layer to thereby form an overlapped region having a hydrophobic outer surface and an exposed region having a hydrophilic outer surface, wherein the overlapped region is on a side of the exposed region distal to the substrate; characterized in that the forming a pixel defining layer having a plurality of accommodating wells over a substrate comprises: providing a mixture of a hydrophilic material and a hydrophobic material; forming the mixture over the substrate; drying the mixture to thereby form a hydrophilic material sub-layer and a hydrophobic material sub-layer, wherein the hydrophobic material sub-layer is at a side of the hydrophilic material sub-layer distal to the substrate; wherein the hydrophobic material sub-layer comprises a fluorine-containing material; and performing a patterning process to form the plurality of accommodating wells in the hydrophilic material sub-layer and the hydrophobic material sub-layer to thereby expose the hydrophilic side surface on the side wall of the each of the plurality of accommodating wells; wherein the hydrophobic material sub-layer does not cover a side wall of the hydrophilic material sub-layer, and the hydrophilic material sub-layer, the hydrophobic material sub-layer and the hydrophobic material layer are arranged sequentially along a direction perpendicular to and away from the substrate. forming a pixel defining layer having a plurality of accommodating wells over a substrate, wherein a side wall of each of the plurality of accommodating wells comprises a hydrophilic side surface; and forming a hydrophobic material layer over the pixel defining layer, such that the hydrophilic side surface is partially covered by the hydrophobic material layer to thereby form an overlapped region having a hydrophobic outer surface and an exposed region having a hydrophilic outer surface, wherein the overlapped region is on a side of the exposed region distal to the substrate; characterized in that the forming a pixel defining layer having a plurality of accommodating wells over a substrate comprises: providing a mixture of a hydrophilic material and a hydrophobic material; forming the mixture over the substrate; drying the mixture to thereby form a hydrophilic material sub-layer and a hydrophobic material sub-layer, wherein the hydrophobic material sub-layer is at a side of the hydrophilic material sub-layer distal to the substrate; wherein the hydrophobic material sub-layer comprises a fluorine-containing material; and performing a patterning process to form the plurality of accommodating wells in the hydrophilic material sub-layer and the hydrophobic material sub-layer to thereby expose the hydrophilic side surface on the side wall of the each of the plurality of accommodating wells; wherein the hydrophobic material sub-layer does not cover a side wall of the hydrophilic material sub-layer, and the hydrophilic material sub-layer, the hydrophobic material sub-layer and the hydrophobic material layer are arranged sequentially along a direction perpendicular to and away from the substrate. providing a mixture of a hydrophilic material and a hydrophobic material; forming the mixture over the substrate; drying the mixture to thereby form a hydrophilic material sub-layer and a hydrophobic material sub-layer, wherein the hydrophobic material sub-layer is at a side of the hydrophilic material sub-layer distal to the substrate; wherein the hydrophobic material sub-layer comprises a fluorine-containing material; and performing a patterning process to form the plurality of accommodating wells in the hydrophilic material sub-layer and the hydrophobic material sub-layer to thereby expose the hydrophilic side surface on the side wall of the each of the plurality of accommodating wells; wherein the hydrophobic material sub-layer does not cover a side wall of the hydrophilic material sub-layer, and the hydrophilic material sub-layer, the hydrophobic material sub-layer and the hydrophobic material layer are arranged sequentially along a direction perpendicular to and away from the substrate.