""Front ""; ""Table of contents""; ""Acronyms""; ""Chapter 1 Introduction""; ""Chapter 2 Growth of GaN on Ge(111)""; ""Chapter 3 Growth of InN on Ge(111) using a GaN buffer""; ""Chapter 4 Formation of crystalline Ge3N4 on Ge(111)""; ""Chapter 5 Ohmic contact formation on nÂtype Ge""; ""Chapter 6 Crystallization of amorphous Ge on Si""; ""Chapter 7 Conclusions and outlook""; ""Appendix A Report on direct photo electrolysis""; ""Appendix B Characterization techniques""; ""List of publications""
