Light conversion in thin films of mixtures of mesotetraphenylporphyrin and yttrium vanadate crystallites doped with erbium. I. Photovoltaic properties and structure

Abstract

The optical and photovoltaic properties of two-component TPP–Yt_0.95Er_0.05VO₄ films prepared by the spincoating method are for the first time studied. A 30% increase in the photovoltage (PV) of TPP: Yt_0.95Er_0.05VO₄ = 3: 2 films on silicon carbide (SiC) supports as compared to TPP one-component films is observed. In contrast, for films on tin dioxide (SnO₂) supports, the PV drops by 35–96% as the TPP content in the film decreases from 80 to 20%. The properties of the films are monitored by atomic force microscopy. The highest roughness of the films corresponds to a 40–60% TPP content.