Epoxy degradation and differentiated phosphor degeneration are methods by which these devices can fail.
These devices are generally covered with a hemispherical package which is designed to be perpendicular to their escape cones. These components suffer a loss of efficiency above ten to twenty milliamps, which was recently discovered to be caused by Auger recombination; that is their namesake (*) droop. Epoxy degradation and differentiated phosphor degeneration are methods by which these devices can fail. One variety of these devices uses either active matrix or passive matrix addressing schemes; that organic variety of these devices can be used in flexible displays. The frequency of these objects' outputs is determined by the bandgap of the semiconductor that makes up a pn junction; at that junction, electrons fall into holes to release photons. For 10 points, name these diodes used in illumination.
These devices are generally covered with a hemispherical package which is designed to be perpendicular to their escape cones.
LED (or light-emitting diode)