Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element having a refractive index for light emitted by the active region...http://www.google.fr/patents/US7064355?utm_source=gb-gplus-shareBrevet US7064355 - Light emitting diodes with improved light extraction efficiency
Light emitting diodes with improved light extraction efficiency
