The University of Michigan – Shanghai Jiao Tong University Joint Institute PhD student Xuejiao Gao from JI professor Yaping Dan’s research group was awarded a “Best Poster Award” with her research presentation on “Defect Investigation of Boron-doped Silicon by Self-Assembled Molecular Monolayers” at the ACS Symposium on Innovation in Materials Science held in Shanghai last week.

201808031副本Nobel laureate William E. Moerner presents the award to Xuejiao Gao

Doping by self-assembled molecular monolayers (SAMM) is a promising alternative doping technology, thanks to its advantages of forming ultra-shallow junctions, introducing no lattice damage to semiconductors and conformal doping on 3-D surfaces. In this poster, Deep Level Transient Spectroscopy (DLTS) and Minority Carrier Transient Spectroscopy (MCTS) are applied for investigating carbon-related defect in boron-doped silicon. The results show that carbon forms minority carrier traps and therefore does not affect the electrical activity of boron dopants. This finding indicates that fully activated single boron dopants may be introduced into silicon by self-assembled molecular monolayer, allowing for the development of single atom electronics.

Founded in 1876, the American Chemical Society (ACS) is the world’s largest scientific society by membership with a total of over 158,000 members. The ACS is a leading source of scientific information through its peer-reviewed scientific journals, national conferences, and the Chemical Abstracts Service. The Shanghai ACS symposium was attended by renowned scholars from home and abroad, chief executive officers of the ACS Publishing Group, and ACS journal editors including Professor William E. Moerner, the 2014 Nobel Prize laureate in Chemistry, Professor Lei Jiang, a member of Chinese Academy of Sciences, and Professor Peidong Yang who is a distinguished professor of the University of California, Berkeley and a member of the American Academy of Arts and Sciences.