Hello
I have seen Cree Led Which show SiC what is this
how it realease photon in form of light
Hi,
We assume you mean this Cree Inc.? If so, in this case SiC stands most likely for silicon Carbide (SiC).
You can read more about SiC in LEDs here and get more details on electro luminescence here.
We hope this helps.
Sincerely,