Ultrafast excitation energy transfer in multilayered ultrathin films of copper phthalocyanine and 1,4,5,8-naphthalenetetracarboxylic dianhydride revealed by femtosecond transient absorption spectroscopy

Yoichiroh Hosokawa*, Kazuya Watanabe, Tsuyoshi Asahi, Hiroshi Fukumura, Hiroshi Masuhara, Yasuo Imanishi

*Corresponding author for this work

Research output: Contribution to journalConference article

3 Scopus citations

Abstract

Relaxation dynamics of photoexcited states 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.

Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume314
DOIs
StatePublished - 1 Jan 1998
EventProceedings of the 1998 TAPPI Metered Size Press Forum - New Orleans, LA, USA
Duration: 30 Apr 19982 May 1998

Keywords

  • 1,4,5,8-naphthalentetracarboxylic dianhydride
  • Copper phthalocyanine
  • Femtosecond absorption spectroscopy
  • Organic multilayered ultrathin film
  • Ultrafast energy transfer

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