The first modern semiconductor diode was made with germanium. These diodes were invented in ww2 for RADAR. But before that semiconductor diodes were made with galena (lead sulfide), copper oxide, and selenium. I have no idea which was "first".
construction and working of semiconductor laser
An electronic component composed of two layers of a semiconductor material is a diode.
The 1 stands for number of semiconductor junctions The N means it's a semiconductor diode
semiconductor diode with out a pn junction.
Schottky Diode
Schottky diode
no
Light Emitting Diode or LED
Light-emitting diode, a semiconductor diode that glows when a voltage is applied.
http://www.answers.com/topic/gallium-iii-arsenide and other semiconductor alloys
gunn diode is transfered electron device & PIN diode is semiconductor device