Patent ID: 9722144
Date: 2017-08-01
CPC Classifications: G01J,G01N,H01L

Claim:
1. A light-emitting diode (LED) comprising: an active region comprising at least one semiconductor having an external quantum efficiency of equal to or greater than about 75%; a first electrode and a second electrode, in electrical communication with the active region, to apply a forward bias of less than about 3.25 V to the active region; and a transparent thermal insulator and a thermally insulating substrate, in thermal communication with the active region, to trap a substantial amount of the heat generated by the LED within the active region so as to thermally assist injection of electrons and holes into the active region, wherein the active region is not mounted on a heat sink and is configured to emit visible light at a wall plug efficiency of at least about 50% via recombination of at least some of the electrons and holes.