This book is a comprehensive report on the preparation, characterization and applications of Copper Indium Aluminium Diselenide: A Chalcopyrite material which finds potential application as an absorber layer in thin film solar cells. The book begins with the introduction of chalcopyrite materials, which is followed by the preparation and characterization of thin films of Copper Indium Aluminium Diselenide for their use as an absorber layer in thin film solar cells. Various metal contacts to these thin films as well as study of current transport through these M-S contact have also been presented in this book. This book is an ideal choice for the researchers working in material science especially on Chalcopyrite compounds.