NIR photoresponse in the mixed phthalocyanine films

Abstract

The structure, optical and conducting properties of thin vacuum deposited films of erbium bisphthalocyanine (Pc 2 Er) and its mixtures with metal-free phthalocyanine (H 2 Pc) have been studied with particular reference to the near infrared (NIR). It has been found that, in spite of intense optical absorbance over the UV/Vis/NIR domain, pure Pc 2 Er films are weakly photoconductive. However, in the mixed Pc 2 Er/H 2 Pc films the photocurrent signal was detected in the NIR range of 1200-1500 nm, which is associated with optical activity of Pc 2 Er molecules.