Yimao Wan

Solar Cells


Risen Energy Co., Ltd,China



Email: wanym@risenenergy.com



Dr. Yimao Wan received the B.E. degree from the Nanyang Technological University, Singapore in 2004. He has six years industrial experience in semiconductor manufacturing between 2004 and 2010, and Ph.D. degree from the Australian National University (ANU) in 2014. And then he as a research fellow at the ANU co-leading with Prof Andres Cuevas the Silicon Passivation group and managing the ANU-ARENA industrial projects. During 2016 to 2017, he has been a visiting fellow at University of California, Berkeley under supervision of Prof Ali Javey. Currently, he is the chief scientist at Risen Energy Co., Ltd., where he is responsible for the development of cutting-edge technologies of high-efficiency crystalline silicon solar cells.



Abstract for Presentation

Progress in n-type passivating contacted cell development



For solar cells to work efficiently, it is essential to suppress the recombination between electrons and holes, both in the bulk and at the surfaces, and to create regions in the device that transport the two charge carriers towards two separated metallic electrodes. This talk will describe several approaches to implement such passivating technologies on silicon. Firstly, I will discuss self-passivating contacts formed by doped polysilicon films deposited onto thin, tunnelling dielectrics, and also dopant-free selective contacts based on materials having either a very low or very high work function. Secondly, I will introduce the latest progress in the research of n-type silicon solar cells based on doped polysilicon passivating contact structure at Risen Energy Co., LTD. The application prospect of doped polysilicon passivating contact structure in n-type silicon solar cells will be discussed from the perspectives of technology and cost.