Question: 3 . Absorption Coefficient: The absorption coefficient of a semiconductor increases abruptly near its bandgap energy. The bandgap energy can be accurately determined by plotting

3 .

Absorption Coefficient: The absorption coefficient of a semiconductor increases abruptly near its bandgap energy. The bandgap energy can be accurately determined by plotting the absorption data in the form of a Tauc plot. Note that we did not discuss Tauc plots in the lecture.

.

Describe how bandgap energy is determined from a Tauc plot for direct gap and indirect gap semiconductors.

.

Discuss any material issues that could lead to errors when using a Tauc plot to determine bandgap energy.

3 . Absorption Coefficient: The absorption

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