| Code: | F K04 |
| Department: | Department of Experimental Physics |
| Course director: | Miklós Török |
| Credits: | 2 |
| Semester: | not fixed |
| Hours/week: | 2+0 |
| Prerequisities: | Electricity and Magnetism |
| Type of assessment: | K |
Course description:
Electronic states in solids: rigid lattice approximation, effective mass, extended and localised states. The polarizable lattice: the polaron. Equilibrium statistics. Dynamic interpretation of the equilibrium: recombination and generation. The transport of carriers: a)displacement of free carriers, scattering, Boltzmann equation, mobility and conductivity, diffusion and drift of carriers; Maxwellian relaxation time; Hall effect. b) carrier transport in forbidden band. The optical absorption,direct and indirect allowed and forbidden transitions. Lattice and impurity absorption. The photoconductivity: mono and bimolecular recombination, effect of traps. Optical filling and emptying of localised states. Thermostimulated conductivity. Semiconductor surfaces: work function, contact potential difference. Metal-semiconductor and insulator-semiconductor contact. The metal-insulator-semiconductor structure. Injection of carriers: non linear conductivity. The homo- and the heterojunction.
Recommended Texts:
Table of Courses |