Electronic device

An electronic device comprising:

• an anode and a cathode facing each other;
• a quantum dot emission layer disposed between the anode and the cathode and comprising a plurality of quantum dots;
• and
• an excitation light emitting source,
• wherein the quantum dot emission layer is configured to receive electrical energy from the anode and the cathode and to emit light having a first wavelength,
• wherein the quantum dot emission layer and the excitation light emitting source are configured so that the excitation light emitting source provides the quantum dot emission layer with light having a second wavelength of about 300 nanometers to about 490 nanometers, and the plurality of quantum dots in the quantum dot emission layer are excited by the light of the second wavelength and emit light having a third wavelength which is greater than the second wavelength,
• wherein the anode, the cathode, or a combination thereof is a light transmitting electrode,
• wherein the light having the first wavelength and the light having the third wavelength are emitted through the light transmitting electrode,
• wherein the excitation light emitting source comprises a light emitting transistor, and
• the light emitting transistor comprises a gate electrode, a channel overlapping at least a portion of the gate electrode and comprising an electroluminescence material, an insulator disposed between the gate electrode and the channel, and a source electrode and a drain electrode electrically connected with the channel.