Question
Question: If the energy of a photon of sodium light (\(\lambda =\) 589 nm) equals the band gap of semiconducto...
If the energy of a photon of sodium light (λ= 589 nm) equals the band gap of semiconductor, the minimum energy required to create hole electron pair
A
1.1eV
B
2.1eV
C
3.2eV
D
1.5eV
Answer
2.1eV
Explanation
Solution
: using, E=Eg=λhc
}{= \frac{6.6 \times 10^{- 34} \times 3 \times 10^{8}}{589 \times 10^{- 9} \times 1.6 \times 10^{- 19}}eV = 2.1eV }$$