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Charge transfer dynamics of 3,4,9,10-perylene-tetracarboxylic-dianhydride molecules on Au(111) probed by resonant photoemission spectroscopy.

Research paper by Liang L Cao, Yu-Zhan YZ Wang, Tie-Xin TX Chen, Wen-Hua WH Zhang, Xiao-Jiang XJ Yu, Kurash K Ibrahim, Jia-Ou JO Wang, Hai-Jie HJ Qian, Fa-Qiang FQ Xu, Dong-Chen DC Qi, Andrew T S AT Wee

Indexed on: 11 Nov '11Published on: 11 Nov '11Published in: The Journal of chemical physics



Abstract

Charge transfer dynamics across the lying-down 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) organic semiconductor molecules on Au(111) interface has been investigated using the core-hole clock implementation of resonant photoemission spectroscopy. It is found that the charge transfer time scale at the PTCDA∕Au(111) interface is much larger than the C 1s core-hole lifetime of 6 fs, indicating weak electronic coupling between PTCDA and the gold substrate due to the absence of chemical reaction and∕or bonding.