LEDS are composed of rare earth elements as Gallium (Ga) or Indium (In). These elements are located at the bottom of the periodic classification and are representing a wide geopolitical issue directly concerning semi industry and microelectronics processes.

All LED manufacturers have in view to make evolve their process to target nano structured forms of silicon carbide or zinc sulphide. Trend is also focused to the structural modification of the LED, as for instance ALEDIA company developments.