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Carbon , silicon and germanium have four...

Carbon , silicon and germanium have four valence electrons each . These are characterised by valence and conduction bands separated by energy band - gap respectively equal to ` (E_g)_(c) (E_g)_(si) ` and ` (E_g)_(Ge) `. Which of the following statements ture ?

A

`(E_g)_(Si) lt (E_g)_(Ge) lt (E_g)_C`

B

`(E_g)_(C) lt (E_g)_(Ge) lt (E_g)_(Si)`

C

`(E_g)_(C) gt (E_g)_(Si) gt (E_g)_(Ge)`

D

`(E_g)_(C) = (E_g)_(Si) =(E_g)_(Ge)`

Text Solution

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The correct Answer is:
C
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