Electric fields in sandwich cells by electroabsorption and electroreflection; The Al/tetracene/nesatron cella)

Abstract

Interfacial electric fields in photoactive Al/tetracene/indium oxide sandwich cells have been studied by electric field perturbed absorption and reflection spectroscopy. Theory shows how electroreflection relates to the electrostatic field at the very surface of tetracene, while electroabsorption depends on the intrinsic potential difference between each electrode/tetracene contact. The magnitude and orientation of each surface field and the interelectrode potential difference for the sandwich cell are reported. In addition, the spectral dependence of electroabsorption and electroreflection predicted by theory is shown to be in good agreement with experiment.