Presentation Information
[1C20]Investigation of structure dependence of luminescence properties on C60 molecular films using STM luminescence measurements
*Lisa Ogata1,2, Kensuke Kimura1, Kyoka Mochizuki1,3, Ikufumi Katayama4, Hiroshi Imada1,5, Takashi Yokoyama2, Jun Takeda1,4,6, Yousoo Kim1,3,5,7 (1. RIKEN, 2. Department of Materials System Science, Yokohama City University, 3. Department of Applied Chemistry, University of Tokyo, 4. Department of Mathematics, Physics, Electrical Engineering and Computer Science, Yokohama National University, 5. Gwangju Institute of Science and Technology (GIST), 6. SIT Research Laboratories, Shibaura Institute of Technology, 7. Institute for Basic Science Center for Quantum Conversion Research (IBS-QCR))
Fullerene (C60) is a typical n-type organic molecule widely used in organic photovoltaics. Since exciton dynamics in molecular films and at interfaces critically determine the device performance, probing these dynamics at their intrinsic length scale is essential. Conventional optical spectroscopy cannot resolve single-molecule characteristics due to the diffraction limit, and the detailed luminescence properties at the single-molecule scale have remained unclear so far. By using electroluminescence spectroscopy based on scanning tunneling microscope (STM), it is possible to investigate the optical properties of material surfaces with single-molecule spatial resolution. In this study, C60 molecular films were grown on NaCl ultrathin insulating layers on Au(111), and their optical properties were investigate using STM luminescence spectroscopy.