Q3. (a) Two semiconductors are brought together to form a junction. Show 5 Marksj] mathematically...
Q3. (a) Two semiconductors are brought together to form a junction. Show 5 Marksj] mathematically that the equilibrium Fermi level remains constant throughout the material. (b)An n-type Si sample at room temperature with N, -1015 Icm' is [n5 Marks) steadily illuminated such that g, -1019 EHP/cm2-s. Electron and hole lifetimes are both 10 us for this excitation. Calculated the separation of the Fermi level from the intrinsic level (Er-E) i. i Calculate the separation in the quasi-Fermi levels (F,-F) ii Sketch their positions on a band diagram.
Q3. (a) Two semiconductors are brought together to form a junction. Show 5 Marksj] mathematically that the equilibrium Fermi level remains constant throughout the material. (b)An n-type Si sample at room temperature with N, -1015 Icm' is [n5 Marks) steadily illuminated such that g, -1019 EHP/cm2-s. Electron and hole lifetimes are both 10 us for this excitation. Calculated the separation of the Fermi level from the intrinsic level (Er-E) i. i Calculate the separation in the quasi-Fermi levels (F,-F) ii Sketch their positions on a band diagram.