Yimao Wan, Australian National University
Room 616,Physics Building
For solar cells to work efficiently, it is essential to supress 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 separate metallic electrodes. This talk will describe several approaches to implement such passivating technologies on silicon. Firstly, we will have an overview of status in current surface passivating materials and then present the progress in developing novel surface passivating materials at ANU. Secondly, we will discuss self-passivating contacts formed by recrystallising doped silicon 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. The latter include metal, metal fluorides and metal oxides. Recent research on deposited-junction silicon solar cells made with such materials will be overviewed.