Review of Semiconductor Physics

3.1. Introduction 57

3.2. Energy bands in typical semiconductors 57

3.3. Intrinsic and extrinsic semiconductors 60

3.4. Electron and hole concentrations in semiconductors 63

3.5. Elementary transport in semiconductors 69

3.5.1. Electric field transport. Mobility 69

3.5.2. Conduction by diffusion 71

3.5.3. Continuity equations. Carrier lifetime and diffusion length 72

3.6. Degenerate semiconductors 75

3.7. Optical properties of semiconductors 76

3.7.1. Optical processes in semiconductors 76

3.7.2. Interband absorption 77

3.7.3. Excitonic effects 80

3.7.4. Emission spectrum 82

3.7.5. Stimulated emission 84 References 87 Further Reading 87 Problems 87

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