Spray Deposition of Multilayer Polymer Structures for Optoelectronic Applications

Spray deposition method was developed as a cost-efficient technique for fabrication of multilayer structures used in the organic based devices (OBD) like diodes, displays and solar cells. The active layers of OBDs were deposited using conventional airbrush. The temperature was varied for layer morphology optimization. The spray deposited at 70 degrees C films showed smoother surface than the spin-coated ones, pinhole-free and uniform coatings were obtained. It was demonstrated that could be produced multilayer structure, containing layers from different organic materials, but all soluble in the same solvent. They remained separated without sublayer damaging. The performance of sprayed multilayer organic device was compared to that of the spin-coated. The structures prepared by spray showed better electrical performance and increasing of the current efficiency.