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Question

In an intrinsic semiconductor, the density of conduction electrons is 7.07×1015m3. When it is doped with indium, the density of holes becomes 5×1022m3. Find the density of conduction electrons in doped semiconductor

A
Zero
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B
1×109m3
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C
7×1015m3
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D
5×1022m3
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Solution

The correct option is A Zero

The calculation of the electron density starts by assuming that the semiconductor is neutral so that there is a zero charge density in the material. The hole concentration in equilibrium is written as a function of the electron density by using the mass action law.0


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