Electroanalytical Investigation of 2,2′,7,7′‐Tetrakis(diphenylamino)‐9,9′‐spirobifluorene

Abstract

Two voltammetric techniques, cyclic voltammetry (CV) and chronocoulometry (CC), were used to investigate the redox characteristics of an organic semiconductor, 2,2′,7,7′‐tetrakis(diphenylamino)‐9,9′‐spirobifluorene (spiro‐TAD). The electron‐transfer characteristics of spiro‐TAD, including the formal oxidation potentials (E o′), diffusion coefficients (D o), and electron‐transfer rate constants (k o′), were estimated by a combination of CV and CC measurements. The energy of the highest‐occupied molecular‐orbital could also be found from the quantitative relationship between the oxidation potential and the ionization energy.