Assertion: blue led | /r/HasProperty | based on indirect bandgap semiconductor
Facets:
Source sentences:
text: In August 1989, Cree introduced the first commercially available blue LED based on the indirect bandgap semiconductor, silicon carbide (SiC).
text: In August 1989, Cree introduced the first commercially available blue LED based on the indirect bandgap semiconductor, silicon carbide (SiC).