Time: January 4th, 2018, 10:00 am
Venue: Conference Room on First Floor, No.1 Energy Building
Lecturer: Dr. YANG Renqiang, Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT), Chinese Academy of Sciences (CAS)
Polymer solar cells have attracted much attention due to their potential for the fabrication of light-weight, large-area, and flexible photovoltaic devices through low-cost solution processing. Compared to most symmetry copolymerized monomers, the strategy of symmetry-breaking applicable in building blocks was employed by us to design new light-harvesting polymers. A series of asymmetric benzodithiophenes (BDTs) with alkoxyl (1D) and aromatic (2D) substituted groups were designed as the electron-rich units for constructing donor-acceptor copolymers. The asymmetry BDTs well combine the advantages of both 1D and 2D symmetry BDTs with good solubility, enhanced intermolecular π-π interactions, extended conjugated degree and appropriate planarity, which are favorable to obtain high efficiency polymer solar cells. As a result, photovoltaic properties of the resulted polymers are improved greatly in comparison with corresponding symmetry BDT based polymers. Thus, it would be a promising approach to design prospective organic opto-electronic materials employing the symmetry-breaking strategy. Meanwhile, in this talk, other strategies proposed by us will be introduced.
Dr. YANG Renqiang is a professor at Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT), Chinese Academy of Sciences. He received his Ph.D. degree from South China University of Technology supervising by Prof. Yong Cao in 2004 and then conducted his postdoctoral work at University of California Santa Barbara in Prof. Guillermo C. Bazan’s group. In 2009, he joined QIBEBT. His research interests include molecular design and synthesis of advanced organic semiconductors and thereof device applications. In the past five years, he already published more than 100 research papers in peer-reviewed journals such as Energy Environ. Sci., Adv. Mater., Adv. Energy Mater., Nano Energy, Chem. Mater., Macromolecules, J. Mater. Chem. A.
Contact: ZHENG Min, DNL16