Dr. Mohammad Afsar Uddin is currently a Postdoctoral research fellow at the University of Illinois at Urbana−Champaign (UIUC). Before that he was a Juan de la Cierva-Incorporation Postdoctoral fellow at the Instituto de Ciencia de Materiales de Madrid -Consejo Superior de Investigaciones Científicas (ICMM-CSIC). Before that, he was a visiting Professor at Jiujiang University, China. He also worked as a Research Professor in the Department of Chemistry, Research Institute of Natural Science, Korea University, Seoul, Republic of Korea. He was a visiting postdoctoral fellow in Prof. Xugang Guo's group at Southern University of Science and Technology of China . He has completed his doctoral degree from department of Cogno-Mechatronics Engineering under Nano Science and Nano Technology College, Pusan National University in Republic of Korea with a thesis titled “Design, synthesis and characterization of semi-crystalline conjugated polymer semiconductors for polymer solar cells” in August 2016 under the guidance of Professor Han Young Woo. Last ten years his research has been mainly focused on design, synthesis and characterization of conjugated polymer, small molecule and polyelectrolyte for optoelectronic device applications, mainly organic Polymer: Fullerene solar cells and Fullerene free solar cells (PSCs) and Organic Field Effect Transistor (OFET), Organic Redox Flow Batteries, Polymorphysom of Pi-Conjugated Molecules, etc.