Yongfang Li is a professor in Institute of Chemistry, Chinese Academy of Sciences (ICCAS) and in Soochow University. He received his Ph. D. degree in department of Chemistry from Fudan University in 1986, then did his postdoctoral research at ICCAS from 1986 to 1988. He became a staff in 1988 and promoted to professor in 1993 in ICCAS. He did his visiting research in Institute for Molecular Science, Japan from 1988.10. to 1991.4. and in University of California at Santa Barbara from 1997.6. to 1998.6. He was invited to be a professor in Soochow University in 2012, and was elected as a member of Chinese Academy of Sciences in 2013. His present research field is photovoltaic materials and devices for polymer solar cells. He has published more than 700 research papers and the published papers have been cited by others for more than 44000 times with an h-index of 106.