Light-emitting element and display device

A display device comprising:

• a two-dimensional phosphor element array in which the phosphor elements are arranged, each phosphor element comprising:
• a pair of electrodes opposed to each other;
• a phosphor layer sandwiched between the pair of electrodes and having silicon fine particles whose average particle diameter is not more than 100 nm, wherein at least a part of a surface of the silicon fine particle is covered with a conductive material;
• and
• a thin film transistor connected to at least one of the electrodes;
• a plurality of x electrodes extending parallel to each other in a first direction which is parallel to a surface of the phosphor element array;
• and
• a plurality of y electrodes extending parallel to each other in a second direction which is perpendicular to the surface of the phosphor element array, and
• wherein the thin film transistor of the phosphor element array connects the x electrode to the y electrode.