Liu Chengyan, the Yellow River scholar of Henan University, and Ding Jun, the Deputy Dean of College of Science of Henan University of Engineering will give academic reports in the meeting room of the College of Science on July 2, at the invitation of the College of Science and the Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices.

Professor Liu has been engaged in the passivation of multi-element semiconductor solar cells for many years. He has unique research on the electronic structure and morphological characteristics of lead selenide quantum dots, as well as the study of silicon carbide defects and phonon modes of stacking structures. Professor Liu will report their theoretical research on Copper, Zinc, Tin and Sulfur Solar Cell Electrode Design, which is based on first-principles calculations, comprehensively considering the impact of the front and rear electrodes of the solar cell on the open circuit voltage and short-circuit current, and discusses how to improve the efficiency of the kesterite solar cell through interfacial doping.

Professor Ding Jun has focused on using first principles to study the physical properties of multi-ferroic materials and two-dimensional materials, as well as device design for a long time. His recent studies have found that the extremely weak interlayer coupling of two-dimensional van der Waals layered ferroelectric materials makes the non-volatile antiferroelectric/ferroelectric phase transition in the material an ideal platform for constructing tunnel junctions, which can change the crystal structure and electronics. Professor Ding Jun will give talks on the design and production of new two-dimensional non-volatile multi-state memory devices.

The lectures are free to attend for all colleagues and students.