The book starts with an introduction which explains the concept of spintronic through electronic spin. Requirement, concept, and contribution is also explained in the early chapter of this book. For/In the following chapter, it explains about spin dependant transport phenomena are more focused on the how spin polarization occurs. On the end of the book chapter, the book describes how the concept of spintronic can be applied in the production of organic solar cell. It reveals that spintronic has succeeded in solving low efficiency problem in organic solar cell.