Patent ID: 9680110
Date: 2017-06-13
CPC Classifications: C07F,C09K,H01L,H05B

Claim:
1. A method of fabricating an opto-electrical device, the method comprising: forming a hole transporting layer over a substrate comprising a first electrode for injecting charge carriers of a first polarity, forming thereover a light-emitting layer by depositing a solution comprising an organic solvent, a solution processable triazine host material and a phosphorescent moiety, and depositing thereover a second electrode for injecting charge carriers of a second polarity opposite to the first polarity, wherein the triazine host material is a small molecule compound and is soluble to a concentration of above 8 mg/ml, wherein the HOMO level of the triazine host material is lower than the HOMO level of the phosphorescent moiety wherein the second electrode has a work function in the range of 2.6 eV to 3.2 eV, and wherein the hole transporting layer comprises a polymer comprising a triarylamine repeat unit and is located between the substrate and the light-emitting layer.