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Question: In a p–type semiconductor the acceptor level is situated 57 meV above the valence band. The maximum ...

In a p–type semiconductor the acceptor level is situated 57 meV above the valence band. The maximum wavelength of light required to produce a hole will be –

A

57 Å

B

57 × 10–3 Å

C

217100 Å

D

11.61 × 10–33 m

Answer

217100 Å

Explanation

Solution

l = hceE\frac{hc}{eE}= 6.62×10–34×3×108×10101.6×10–19×57×10–3A˚\frac{6.62 \times 10^{–34} \times 3 \times 10^{8} \times 10^{10}}{1.6 \times 10^{–19} \times 57 \times 10^{–3}}Å

= 217100 Å