Question

A sample of an unknown elemental semiconductor had the following values of resistance at the given temperatures:

Calculate its band (energy) gap and, comparing this value with published data, what is the likely semiconductor? Do you think your calculated value is reasonable? Why/why not? (10 marks) Hint: Remember the relationships between resistance, resistivity and conductivity, then use the relevant conductivity equation for plotting ln(1/R) vs 1000/T.

A sample of an unknown elemental semiconductor had the following values of resistance at the given temperatures: 3. T (K) 310 339 360 383 405 434 R (S2) 13.5 4.95 2.41 1.22 0.74 0.37 Calculate its band (energy) gap and, comparing this value with published data, what is the likely semiconductor? Do you think your calculated value is reasonable? Why/why not? (10 marks) Hint: Remember the relationships between resistance, resistivity and conductivity, then use the relevant conductivity equation for plotting ln(1/R) vs 1000/T.

Answer 1

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or ㄒ ㄒ 1-75-18 3.5 3 3- 6 -*Ue 2 kB

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