The book includes both fundamental and technological aspects of defects in semiconductor materials and devices, including photovoltaics. The 74 papers are grouped as follows: I. Defect engineering in silicon solar cells; II. Structural and production issues in cast silicon materials for solar cells; III. Characterisation of silicon for solar cells; IV. Intrinsic point defects in silicon; V. Light impurities in silicon-based materials; VI. Metals in silicon: fundamental properties and gettering; VII. Extended and implantation-related defects in silicon; VIII. Surfaces, passivation and processing; IX. Germanium-based devices and materials; X. Semiconductors other than silicon and germanium; XI. Nanostructures and new materials systems. Review from Book News Inc.: The proceedings for GADEST 2013 contains 84 papers on such matters as defect engineering in silicon solar cells, structural and production issues in cast silicon materials for solar cells, characterizing silicon for solar cells, intrinsic point defects in silicon, light impurities in silicon-based materials, fundamental properties and gettering of metals in silicon, extended and implantation-related defects in silicon, germanium-based devices and materials, semiconductors other than silicon and germanium, and nanostructures and new materials systems.