Molecular Orientation and Site Dependent Charge Transfer Dynamics at PTCDA/TiO2(110) Interface Revealed by Resonant Photoemission Spectroscopy

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• 作者：Liang Cao ; Yu-Zhan Wang ; Jian-Qiang Zhong ; Yu-Yan Han ; Wen-Hua Zhang ; Xiao-Jiang Yu ; Fa-Qiang Xu ; Dong-Chen Qi ; Andrew T. S. Wee
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：February 27, 2014
• 年：2014
• 卷：118
• 期：8
• 页码：4160-4166
• 全文大小：350K
• 年卷期：v.118,no.8(February 27, 2014)
• ISSN：1932-7455

文摘

Charge transfer dynamics across the interface of 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) organic molecules and the reduced rutile TiO₂ (110) 1 脳 1 surface has been investigated using core-hole clock implementation of resonant photoemission spectroscopy (RPES). It is found that ultrafast charge transfer from PTCDA molecules to TiO₂ substrate takes place on the time scale of 8鈥?0 fs due to their strong electronic coupling. Moreover, the charge transfer time scale at the PTCDA/TiO₂ (110) interface shows evident orientational dependence which varies with the molecular site owing to different electronic coupling strengths.