报告人：Dr. CHEN Wei, Assistant Professor, National University of Singapore, Singapore

邀请人：倪振华
时间：12月10号（周五）上午10:00
地点：田家炳南楼203

Abstract:

Self-assembled molecular nanostructures or organic thin films with well-defined orientation, conformation, and two-dimensional (2D) organization on surfaces have great potential in organic electronics, and molecular nano-devices. Their interfaces to substrates (dielectric or conducting electrodes) and of the organic heterojunctions have the crucial impact on the device performances. In particular, significant improvement on the power conversion efficiency of organic photovoltaic devices, constructed from organic p-n or organic-inorganic heterojunctions, relies on the thorough understanding as well as effective engineering of those interface properties. In this talk we will focus on our recent results of STM and synchrotron studies of the molecule-substrate interface. We use synchrotron-based photoemission spectroscopy (PES), near-edge x-ray absorption spectroscopy (NEXAFS) and low-temperature scanning tunneling microscopy (LT-STM) to investigate the molecular and organic-electronics and graphene related interface problems, including self-assembled molecular nanostructure arrays, interface dipole formation, interface energy level alignment, supramolecular packing and molecular orientation.

Dr. CHEN Wei received his Bachelor’s degree in Chemistry from Nanjing University (China) in 2001, Ph.D. degree from Chemistry Department at National University of Singapore (NUS) in 2004, and did his postdoctoral research in Physics Department at NUS from 2004-2008. He has been an Assistant Professor in both Chemistry Department and Physics Department at NUS since Jan, 2009. His current research interests include the molecule-substrate interface problems associated with molecular electronics, organic electronics and graphene-related devices. He has also published more than 70 papers on high-impact journals in these topics, including 5 invited review articles, and receiving over 900 citations with H-index of 19. Dr. Chen is a recipient of the Lee Kuan Yew Research Fellowship (2006), Omicron Nanotechnology Award (2009), Hitachi Research Fellowship (2010), and NUS Young Investigator Award (2010).

Selected Publications:

1. Chen Wei*, Qi DC, Huang H, Gao XY, and Wee ATS*, Advanced Functional Materials (Invited Review) (2010)

2. Huang YL, Chen Wei*, Li H, Pflaum J, Ma J, Wee ATS*, Small 6, 70-75 (2010).

3. Huang H, Chen S, Gao XY, Chen Wei*, Wee ATS*, ACS Nano 3, 3431 (2009).

4. Huang H, Chen Wei*, Chen S, Wee ATS*, ACS Nano. 2, 2513-2518 (2008).

5. Chen Wei*, Li H, Huang H, Fu YX, Zhang HL, Ma J*, Wee ATS*, J. Am. Chem. Soc. 130, 12285-12289 (2008).

6. Chen Wei*, Zhang HL, Huang H, Chen L, Wee ATS*, ACS Nano 2, 693 (2008).

7. Zhang HL, Chen Wei*, Huang H, Chen L, Wee ATS*, J. Am. Chem. Soc. 130, 2720 (2008).

8. Chen L, Chen Wei*, Huang H, Zhang HL, Yuhara J, and Wee ATS*, Advanced Materials. 20, 484 (2008).

9. Zhang HL, Chen Wei*, Chen L, Huang H, Wang XS, Yuhara J, and Wee ATS*, Small 3, 2015 (2007).

10. Chen Wei*, Chen S, Qi DC, Gao XY, and Wee ATS*, J. Am. Chem. Soc. 129, 10418 (2007).

11. Chen Wei, Gao XY, Qi DC, Chen S, Chen ZK, and Wee ATS*, Advanced Functional Materials, 17, 1339 (2007).