抄録
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.
本文言語 | English |
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論文番号 | 203111 |
ジャーナル | Applied Physics Letters |
巻 | 109 |
号 | 20 |
DOI | |
出版ステータス | Published - 2016 11 14 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)