Sensitizing the luminescence and photoconductivity of MEH-PPV films with organic dyes

This paper discusses the spectroluminescence, electro-, and photoconductive properties of films of poly [2-methoxy-5-(2'-ethyl-hexyloxy)- 1,4-phenylene-viilylene] with additives of neutral and intraionic organic dyes, which absorb and reradiate the light in the near-IR region. The sensitizalion of the inner photoelectric effect is explained by the photogeneration of charge carriers from the dye molecules. Luminescence quenching and an increase of the photoconductivity of the films are detected when fullerene C-60 is added to them. The photoconductivity increase is associated with the capture of electrons and their transport over the C-60 molecules. (c) 2007 Optical Society of America.