The 7 1 papers are grouped as follows: Chapter 1: Growth of Mono- and Multi-Crystalline Silicon; Chapter 2: Passivation and Defect Studies in Solar Cells; Chapter 3: Intrinsic Point Defects and Dislocations in Silicon; Chapter 4: Light Elements in Silicon-Based Materials; Chapter 5: Properties and Gettering of Transition Metals in Silicon; Chapter 6: Radiation- and Impurity-Related Defect Studies in Silicon and Germanium; Chapter 7: Thermal Properties of Semiconductors; Chapter 8: Luminescence and Optical Properties of Semiconductors; Chapter 9: Nano-Sized Layers and Structures; Chapter 10: Wide-Bandgap Semiconductors; Chapter 11: Advanced Methods and Tools for Investigation of Semiconductor Materials