2014
DOI: 10.7566/jpscp.1.014002
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Abstract: Using synchrotron-radiation photoemission spectroscopy, we have studied the effect of potassium doping on rubrene: C 60 heterojunctions. The potassium-doped heterointerfaces was obtained by means of C 60 on a K 0.5 Rubrene surface. As the heterointerface formed, the potassium diffuses into the C 60 layer, and transfers negative charge into the lowest unoccupied molecular orbital (LUMO) of C 60. With K doping, the enhancement of the interfacial dipole potential, and the creation of gap states, as well as the in…

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