In 6 lecture modules and 4 observational visits to laboratories on UK campus, this course covers: effects of small size (1 nm to 100 nm) on the electro-optical properties of materials; fundamental principles of quantum mechanics; applying quantum mechanics to understand the changes in material properties like color, luminescence and electrical conductance at nanoscale; operating principles, basic theory and design issues in solar cells; nanotechnology applications for enhancing the performance of renewable energy generation and storage systems, especially solar cells and batteries.