Unformatted text preview: obtain the intrinsic carrier concentration at 500 K. Also, the band gap energy is reduced to 1.08 eV at 500 K. 3. A compensated germanium sample is doped with 4x10 13 /cm 3 acceptors and 4x10 15 /cm 3 donors. (a) What are the electron and hole concentrations, respectively, at room temperature under equilibrium conditions? Repeat for (b) 4x10 13 /cm 3 acceptors and 4x10 14 /cm 3 donors (c) 4x10 13 /cm 3 acceptors and 6x10 13 /cm 3 donors and (d) 4x10 13 /cm 3 acceptors and 4.1x10 13 /cm 3 donors. Determine the percentage of error in each case for the majority carrier concentration if one simply assumes that the majority carrier concentration approximately equals the difference between the densities of donors and acceptors....
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- Spring '11
- Condensed matter physics, Band gap, 500 K, /cm acceptors