Ultrafast dynamics of the excitons in a series of axially and bridged substituted phthalocyanine thin films

Rong Yi Zhu, Yu Chen, Jiong Zhou, Bo Li, Wei Min Liu, Shi Xiong Qian, Michael Hanack, Yasuyuki Araki, Osamu Ito

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Femtosecond degenerate pump-probe spectroscopy was carried out on thin films of a series of axially substituted phthalocyanines including tBu4PcInCl(tBu4 = tetra-(tert-butyl)), tBu4PcTiO, tBu4PcIn(p-TMP) [p-TMP = p-trifluoromethylphenyl], tBu4PcGa(p-CPO) [p-CPO = p-chlorophenoxy], and μ-oxo-bridged phthalocyanine dimers, e.g., [tBu4PcIn]2O, tBu4PcIn O GaPctBu4 and [tBu4PcGa]2O. We demonstrate that the long lived state of the dynamics is the triplet state and the behavior of the degenerate pump-probe was determined by exciton-exciton annihilation (E-EA), nonradiative recombination (NR) and intersystem crossing (ISC) processes. The E-EA process is via the long-range dipole-dipole interaction between excitons or motion-limited diffuse other than exciton hopping migrations. The dimers shows much efficient E-EA and the indium-contained samples have larger ISC rate than the others.

Original languageEnglish
Pages (from-to)308-312
Number of pages5
JournalChemical Physics Letters
Volume398
Issue number4-6
DOIs
Publication statusPublished - 2004 Nov 11

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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