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8-Hydroxyquinoling aluminum (Alq3) and 11, 11, 12, 12-tetracyano-9, 10-anthraquino dimethane(TCAQ) monolayer films and their heterostructure complex films were prepared by a vacuum deposition method. By means of surface photovoltage spectroscopy (SPS) and electric field-induced surface photovoltage spectroscopy (EFISPS), the band gaps of TCAQ and Alq3 monolayer films and the properties of the Alq3/TCAQ bilayer film were investigated. By analysing the mechanism and the results of the SPS and the EFISPS, a reasonable energy band structure of the Alq3/TCAQ complex film was roughly determined.
8-Hydroxyquinoling aluminum (Alq3) and 11, 11, 12, 12-tetracyano-9, 10- anthraquino dimethane (TCAQ) monolayer films and their heterostructure complex films were prepared by a vacuum deposition method. By means of surface photovoltage spectroscopy (SPS ) and electric field-induced surface photovoltage spectroscopy (EFISPS), the band gaps of TCAQ and Alq3 monolayer films and the properties of the Alq3 / TCAQ bilayer films were investigated. By analysing the mechanism and the results of the SPS and the EFISPS, a reasonable energy band structure of the Alq3 / TCAQ complex film wasively determined.