In recent decades, scientists have done a lot of research to find ways to make use of solar energy. One of the most direct ways is to use solar cell to transform sunshine into electricity. So what are the current products that use solar energy? And what can humans do with solar energy in the future?This book is a compilation of the series of 'Dialogues With Great Chinese Scientists', where several great scientists in different research files were invited to share their stories and scientific knowledge. It is meant to inspire more students to become great scientists in the future.