Roughened high refractive index layer/led for high light extraction

A light emitting diode, comprising:

• a plurality of semiconductor layers;
• a substantially planar conductive layer on a top one of said semiconductor layers;
• a transparent layer on said conductive layer, said transparent layer comprising a rough primary emission surface;
• and
• a contact on said conductive layer;
• wherein said conductive layer is one of a transparent conductive oxide and a metal.

A light emitting diode, comprising:

• a plurality of semiconductor layers, comprising:
• an n-type layer;
• a p-type layer;
• and
• an active layer between said n-type and p-type layers;
• a transparent emission layer on said plurality of semiconductor layers, said emission layer comprising a rough primary emission surface;
• an n-contact on said plurality of semiconductor layers with one or more layers therebetween.

A light emitting diode, comprising:

• a plurality of semiconductor layers;
• a substantially transparent conducting layer on one of said semiconductor layers;
• a transparent layer on said transparent conducting layer;
• and
• a contact on said transparent conducting layer with said transparent layer at least partially surrounding said contact.