Suppose a pure Si crystal has \(5\times10^{28}~\text{atoms m}^{-3}\)It is doped by a \(1\) ppm concentration of pentavalent As. The number of electrons and holes are, respectively: (Given: \(n_i=1.5\times10^{16}~\text{m}^{-3}\))

1. \(5\times10^{22}~\text{m}^{-3}, 4.5\times10^{9}~\text{m}^{-3}\) 
2. \(4.5\times10^{9}~\text{m}^{-3}, 5\times 10^{22}~\text{m}^{-3}\) 
3. \(5\times10^{22}~\text{m}^{-3}, 5\times10^{22}~\text{m}^{-3}\)
4. \(4.5\times10^{9}~\text{m}^{-3}, 4.5\times 10^{9}~\text{m}^{-3}\)
Subtopic:  Types of Semiconductors |
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NEET 2023 - Target Batch - Aryan Raj Singh
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