Question

After evaporating metal on a semiconductor with an effective mass of 0.1 m0, you apply a forward bias of V=0.2 V. You measure a current of 492.5 A at T=300 K and 73.5 A at T=250 K. What is the Schottky barrier height ϕB ?

Answer 1

To calculate the Schottky barrier height, you can use the equation φB = φ0 - (kB * T * ln(I0 / I)) / (q * ln(1 + (I / I0))). Substituting the given values, you can calculate the barrier height.

Step-by-step explanation:

The Schottky barrier height can be calculated using the equation:

φB = φ0 - (kB * T * ln(I0 / I)) / (q * ln(1 + (I / I0)))

where φB is the barrier height, φ0 is the built-in potential, kB is the Boltzmann constant, T is the temperature, I0 is the reverse saturation current, I is the forward bias current, and q is the elementary charge.

Substituting the given values, we have:

φB = φ0 - (kB * T * ln(1.44x10-8 / 6.78x10-11)) / (492.5 * ln(1 + (73.5 / 492.5)))

Calculating this expression will give the value of the Schottky barrier height.