1) The energy from light impinging on a semiconductor predominately cause.......

Question

1) The energy from light impinging on a semiconductor predominately cause............electron transition

2) The semiconductor 3C-SiC conduction band energy of Ec = 2.3eV and a valence band energy of Ev = 0 eV. what is the bandgap energy of this semiconductor?

3) What term is used to describe a small portion of a crystal solid that can be used to reproduce the entire crystal structure?

4) consider a fcc lattice structure with lattice constant of 1A(1A = 1*10^-8 cm). assuming there are 6 valence electron per atom, calculate the electron density for this fcc lattice structure.

Explanation / Answer

1-can have number of answers refer to your notes

2- Band gap energy is the difference between energy of conduction band Ec and energy of valence band Ev

Eg = Ec -Ev = 2.3 eV

3-The term is known as Unit cell. A unit cell is the the smallest group of atoms which has the overall symmetry of a crystal, and from which the entire lattice can be built up by repetition in three dimensions

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