TITLE

Direct observation of the electronic states of single crystalline rubrene under ambient condition by photoelectron yield spectroscopy

AUTHOR(S)
Nakayama, Yasuo; Machida, Shinichi; Minari, Takeo; Tsukagishi, Kazuhito; Noguchi, Yutaka; Ishii, Hisao
PUB. DATE
October 2008
SOURCE
Applied Physics Letters;10/27/2008, Vol. 93 Issue 17, p173305
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The electronic states of single crystalline (SC) rubrene were experimentally observed by photoelectron yield spectroscopy without the sample charging problem. The ionization energy (Is) in the SC phase was determined to be 4.85(±0.05) eV, which is reduced by 0.45 eV compared to that of the amorphous film. The changes in the electronic states during photo-oxidation reaction and under ambient air were also observed directly to reveal the further reduction in Is, which can be attributed to the generation of polar oxide molecules and reversible physisorption of H2O, respectively.
ACCESSION #
35279070

 

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