On the photochemical stability of dialkoxy–PPV; a quantitative approach

Abstract
In this paper we describe a quantitative approach to the photochemical degradation of a soluble dialkoxy–PPV that was also used to make polymer light–emitting diodes. We have defined a quantum yield for degradation (γ) and investigated the dependence (γ) on various experimental parameters, e.g. wavelength and power of incident light, and the dependence on the oxygen concentration. In the presence of oxygen the main degradation mechanism is photo–oxidation.