Ink including an organic material, display device using the same, and method of manufacturing display device

A method of manufacturing a display device, the method comprising the steps of:

• forming a pixel electrode on a substrate;
• forming a bank layer on the pixel electrode, the bank layer having an opening exposing at least part of the pixel electrode;
• and
• forming an intermediate layer on the pixel electrode by discharging ink comprising an organic material onto the pixel electrode,
• wherein the organic material has a molecular weight greater than about 500 and less than about 1,000,000 g/mol, and
• the organic material in the ink has a concentration and the molecular weight of the organic material satisfy:
• y>−3.518*ln(x)+45.59,
• wherein y is the concentration of the organic material, and x is the molecular weight of the organic material.