| Summary: | 碩士 === 國立嘉義大學 === 電子物理學系光電暨固態電子研究所 === 100 === In this thesis, using synchrotron radiation photoemission spectroscopy, we have studied the interface electronic structures of K doping into rubrene.The evolution of the photodectron spectra could be separated into three stages. In the first stage, the spectra shift to the higher binding energy.
However, the line shapes have no change and no K singnals are revealed,indicating that diffuses into rubrene. A significant shift of the vacuum level indicates the existence of the interfacial dipole. In the second stage, all spectra have no obvious shift. Gap states appeared result from the distrurbed former HOMO, and former LUMO filled into change transferred from K atoms. In the third stage, all spectra shift to higher binding energy again increasing K doping, the gap states increase in intensity. A new state appears at higher binding energy side of H2. The interfacial energy level diagram shows that, the generation of gap states may euhance the light absorption.
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