Characterization of Thin Films of Conjugated Polymer (BEHP-PPV) -co-(MEH-PPV) for OLEDs Aplication

(BEHP-PPV)-co-(MEH-PPV) is a highly soluble copolymer, more stable to photo-oxidation process than other phenyl-substituted PPV derivatives, which is appropriate to use as the active layer in organic-based light emitting devices (OLEDs). In this paper we present optical properties such as the refractive index, the extinction coefficient, and the optical gap between HOMO and LUMO levels of these polymer films, determined by absorption and photoluminescence measurements. We also show the J-V characteristics of single-layer diode structures and their relation with the injecting electrodes. It was also studied etch properties of the film looking for compatibility with photolithographic processes