期刊
APPLIED PHYSICS LETTERS
卷 93, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.2998650
关键词
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资金
- G-COE Program (Advanced School for Organic Electronics)
- KAK-ENHI [18350093, 19655065]
- Joint Studies Program
- Grants-in-Aid for Scientific Research [19655065, 18350093] Funding Source: KAKEN
The electronic states of single crystalline (SC) rubrene were experimentally observed by photoelectron yield spectroscopy without the sample charging problem. The ionization energy (I-s) 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 I-s, which can be attributed to the generation of polar oxide molecules and reversible physisorption of H2O, respectively. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2998650]
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