Study of charge transition between interfaces of hetero-structured assemblies based on phenyl-capped aniline tetramer(p)-silcon

摘要

Emeraldine base (PECT-EE) and leucoemeraldine base (pECT-LEE) of phenyl-end-capped aniline tetramer have been coated on n(p)-silicon wafers by spin-coating, respectively. The interfacial electron transfers of the assemblies PECT-EE/p-Si, PECT-EEffi-Si, PECT -LEE/p-Si, and PECT -LEEffi-Si were studied by surface photovoltage spectroscopy (SPS). The results indicate that PECT -EE and PECT -LEE make the surface photovoltage (SPY) response of p-Si decreasing and the SPY response of n-Si increasing. The facts imply that the mechanisms of charge transfer of the assemblies are different. Therefore, two reasonable energy band models have been built up to illustrate the transfer process of interfacial charges of p-Si and n-Si coated by PECT -EE and PECT -LEE.