Dresden 2017 – wissenschaftliches Programm
CPP 64.2: Vortrag
Freitag, 24. März 2017, 09:45–10:00, CHE 91
STM and PES Investigations of Organic-TMD Heterointerfaces: Self-Assembly and Energy Level Alignment — •Thorsten Schultz1, Yuli Huang2,3, Zhibo Song2,3, Zijing Ding2, Lain-Jong Li4, Dongzhi Chi2, Patrick Amsalem1, Andrew Wee3, and Norbert Koch1 — 1Humboldt-Universität zu Berlin, Germany — 2Agency for Science, Technology and Research, Singapore — 3National University of Singapore — 4King Abdullah University of Science and Technology, Saudi Arabia
The growing interest in two-dimensional transition metal dichalcogenide (TMD) materials brings additional opportunities for interfacing with organic molecules to fabricate flexible organic/inorganic devices. However, the complex interfacial properties at the organic-TMD heterointerfaces, including the growth behavior and energy level alignment (ELA) that determine the device performance, are still not well understood. Combining scanning tunneling microscopy/spectroscopy (STM/STS) with photoemission spectroscopy (PES), we are able to probe the self-assembly of fluorinated fullerene C60F48 on single-layer WSe2 deposited on a graphite substrate and its interfacial electronic properties. From our studies it is found that the interfacial dipole together with charge transfer play critical roles in determining the phase evolution of the C60F48 molecules adsorbed on the surface, as well as the ELA at the C60F48/WSe2/graphite heterointerface.