|
Type |
Poster Presentation |
Area |
Physical Chemistry |
Room No. |
Grand Ballroom |
Time |
10월 19일 (금요일) 11:00~12:30 |
Code |
PHYS.P-199 |
Subject |
Formation and Photophysical Behavior of Two-Dimensional PTCDA Film (perylene-3,4,9,10-tetracarboxylic dianhydride) on Graphene |
Authors |
Dogyeong Kim, Sunmin Ryu* Department of Chemistry, Pohang University of Science and Technology, Korea |
Abstract |
Two-dimensional van der Waals (2D vdW) heterostructures have recently gained much research interest due to their unusual properties and new phenomena. Despite their potential both in fundamental research and application, organic-inorganic 2D vdW heterostructures have not been under systematic spectroscopic investigation. In this work, PTCDA/graphene heterostructures were generated by self-limited assembly of organic vapors at elevated temperatures. Topographic details and photophysical properties of the heterostructures were studied by atomic force microscopy, micro-Raman, photoluminescence (PL) and reflectance spectroscopy. PL spectra exhibited significant progression with increasing thickness of PTCDA and their intensity was greatly quenched on metallic graphene. The quenching of strong PL signals revealed vibrational Raman features of PTCDA clearly on graphene. Absorption peaks identified from the reflectance measurements were attributed to molecular S0-S1 transition, charge-transfer exciton and an unknown origin. The topographic and spectroscopic features will be discussed regarding their dependence on the thickness of PTCDA and graphene substrates. |
E-mail |
rlaehrud12@Postech.ac.kr |
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