Imaging and spectromicroscopy of photocarrier electron dynamics in C60 fullerene thin films

Masahiro Shibuta, Kana Yamagiwa, Toyoaki Eguchi, Atsushi Nakajima

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We have employed a two-photon photoelectron emission microscopy (2P-PEEM) to observe the photocarrier electron dynamics in an organic thin film of fullerene (C60) formed on a highly oriented pyrolytic graphite with a spatial resolution of ca. 135 nm. In this approach, photocarrier electrons in C60 single-layer islands generated by the first pump photon are detected by the second probe photon. These spectromicroscopic observations conducted over a 100 × 100 nm2 region of C60 islands consistently reproduced the macroscopic two-photon photoemission spectrum of fully covered C60 monolayer film, where the energy of photocarrier electron in the islands was +0.9 eV relative to the Fermi level. Time-resolved 2P-PEEM revealed that the photocarrier electron decayed from the monolayered C60 islands into the substrate with a time constant of 470 ± 30 fs.

Original languageEnglish
Article number203111
JournalApplied Physics Letters
Volume109
Issue number20
DOIs
Publication statusPublished - 2016 Nov 14

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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