Patent ID: 8629425

Claim:
A tunable light emitting diode comprising: a first set of multiple quantum wells (MQWs), each of the MQWs of the first set comprising a well layer having quantum dots (QDs) formed therein, and a wetting layer having a different composition than the quantum dots and providing nucleation sites for the QDs in the well layer of said each MQW; and a second set of MQWs, each of the MQWs of the second set formed so as to exhibit a photoluminescence (PL) peak wavelength shifted compared to the MQWs of the first set, wherein the QDs comprise In atoms, and the first set of MQWs is configured to provide a broad emission band with wavelength at least in the range of 500 nm to 700 nm, and wherein the tunable light emitting diode further comprises electrical contacts for receiving an applied voltage to control an output wavelength of the light emitting diode such that the output wavelength of the light emitting diode is tunable by varying the applied voltage.