Patent ID: 7875308
Filing Date: 2011-01-25
Classification: C09K,H01L,H05B,Y10S

Abstract:
1. A method for fabricating an organic EL device comprising: providing a substrate; forming a first electrode on the substrate; forming a hole injection layer over the substrate; forming a hole transport layer over the hole injection layer; forming a light-emitting layer on the hole transport layer by Laser Induced Thermal Imaging (LITI) method; and forming a second electrode over the light-emitting layer, wherein the light-emitting layer uses a mixture of an optically active low molecular electric charge transport material, a high molecular light-emitting substance, and a high molecular matrix and the light-emitting layer is patterned to an edge roughness of 5 to 8 μm, wherein the hole injection layer is spin coated on the substrate after treating UV/O3 onto a surface of the substrate, and wherein the low molecular electric charge transport material is 4,4′-N,N′-dicarbazole-biphenyl (CBP), and has a weight ratio between 0.1 and 0.9 of the total weight of the light-emitting layer, wherein the optically active low molecular electric charge transport material is dissolved in toluene in a concentration ranging from 1.0 to 2.0 wt %, the high molecular matrix is dissolved in toluene in a concentration ranging from 1.0 to 2.0 wt %, and the high molecular light-emitting substance is dissolved in toluene in a concentration ranging from 1.0 to 2.0 wt %.