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Abstract
Relaxation dynamics of photoexcited stales in ultrathin multilayered films composed of copper phthalocyanine (CuPc) and 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA), were investigated by femtosecond absorption spectroscopy. Absorption bands due to an electronically excited state and a vibrationally excited state of electronically ground state of CuPc were measured for the excitation at 390 nm and 780 nm. Furthermore, an additional absorption band was observed when excited at 390 nm, which was assigned to an NTCDA excited state. Ultrafast energy transfer from NTCDA to CuPc takes place with the time scale of 1 ps at the interface between NTCDA and CuPc layers.
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Schedule a callMore From: Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
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