有機薄膜のマイクロビーム顕微光電子分光

概要

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Laterally inhomogeneous electronic structures of thin organic films have been studied by using a laser-based microbeam photoemission spectrometer which achieved an energy resolution of 30 meV and a lateral resolution of 0.3 μm. Modifications of the electronic structures by lateral intermolecular interaction and by interlayer interaction were separately observed for copper phthalocyanine films. Microspectrscopy and imaging of titanyl phthalocyanine films grown on a graphite surface showed formation and decay of islands of metastable bilyer films. The spectrometer can also probe the unoccupied states by employing two-photon photoemission (2PPE). The lateral resolution for micro-2PPE was 0.4 μm. These results demonstrate the capability of the photoemission microspectroscopy to resolve complicated electronic structures of realistic organic films.
日本真空協会の論文
2008-06-20