%0 Journal Article
%T STM-induced light emission from thin films of perylene derivatives on the HOPG and Au substrates
%A Fujiki Aya
%A Miyake Yusuke
%A Oshikane Yasushi
%A Akai-Kasaya Megumi
%J Nanoscale Research Letters
%D 2011
%I Springer
%X We have investigated the emission properties of N,N'-diheptyl-3,4,9,10-perylenetetracarboxylic diimide thin films by the tunneling-electron-induced light emission technique. A fluorescence peak with vibronic progressions with large Stokes shifts was observed on both highly ordered pyrolytic graphite (HOPG) and Au substrates, indicating that the emission was derived from the isolated-molecule-like film condition with sufficient ¦Ð-¦Ð interaction of the perylene rings of perylenetetracarboxylic diimide molecules. The upconversion emission mechanism of the tunneling-electron-induced emission was discussed in terms of inelastic tunneling including multiexcitation processes. The wavelength-selective enhanced emission due to a localized tip-induced surface plasmon on the Au substrate was also obtained.
%U http://www.nanoscalereslett.com/content/6/1/347