Patent ID: 8093580

Claim:
A semiconductor device having a structure in which a light-emitting layer is sandwiched by a cathode and an anode, at least one of the cathode and the anode includes single-wall carbon nanotubes, each of the single-wall carbon nanotubes encapsulates a donor or an acceptor, and the light-emitting layer performs electroluminescence; wherein the donor has an ionization potential lower than an effective intrinsic work function of the single-wall carbon nanotubes when the single-wall carbon nanotubes constitute the cathode, and each of the single-wall carbon nanotubes has the donor encapsulated therein so that the work function of the single-wall carbon nanotubes is adjusted to a LUMO energy level of a light-emitting material including in the light-emitting layer; and wherein the acceptor has an electron affinity higher than an effective intrinsic work function of the single-wall carbon nanotubes when the single-wall carbon nanotubes constitute the anode, and each of the single-wall carbon nanotubes has the acceptor encapsulated therein so that the work function of the single-wall carbon nanotubes is adjusted to a HOMO energy level of a light-emitting material including in the light-emitting layer.