Lei Chen is a visiting professor at Jillian’s group. Prof. Chen got his Ph.D. from University of Science and Technology of China in 2007, majored in Nuclear Science and Applications. Then, he took postdoctoral research successively in Hefei University of Technology and in National Taiwan University. Next, he joined in Hefei University of Technology and was promoted to Associate Professor in 2010. His current interests of research focus on new materials for solar cells and light-emitting diodes. He has published more than 50 peer-reviewed papers with citations more 1000 times.