Patent ID: 8895955

Claim:
A display apparatus comprising: a substrate; a thin film transistor layer on the substrate; and a light emitting layer on the thin film transistor layer, wherein the light emitting layer includes: a plug metal layer on the thin film transistor layer; a plurality of nano-rod diodes substantially vertically erected on the plug metal layer, the plurality of nano-rod diodes being spaced apart from each other; and a transparent electrode on the plurality of nano-rod diodes, wherein each of the plurality of nano-rod diodes includes a lower layer portion doped with a first type dopant, an upper layer portion doped with a second type dopant which is opposite to the first type, and a non-doped region between the lower layer portion and the upper layer portion, and wherein the lower and upper layer portions of the nano-rod diode are formed of a doped ZnO group or a doped MgZnO group material, and the non-doped region of the nano-rod diode is formed of a non-doped ZnO group material.