The Deal-Grove model describes the rate of thermal (15[1])oxidation of this material. The 1980s discovery that a porous version of this material displays room-temperature photoluminescence spurred interest in using it for photonics. This material is produced via deposition of a trichloro- precursor in the Siemens process. Pure boules (15[1])of this material (15[2])produced via the (-5[1])Czochralski (15[1])process (15[1])are cut then coated with (*) photoresist (-5[1])in one process. (-5[1])Due to cost, this indirect bandgap material’s polycrystalline (-5[1])form is more prevalent than its monocrystalline form for PV applications. This material, which shares diamond’s lattice structure, is often (-5[1])“doped” with (-5[1])group (-5[1])13 or 15 elements like boron or phosphorus to improve its conductivity. For 10 points, wafers of what elemental (10[2])semiconductor are used to create integrated circuits? (10[1])■END■ (10[5]0[1])