A 6H-indeno[2,1-b]quinoline derivative has a structure of formula (I). Each of Ar.sub.1 and Ar.sub.2 is a member selected from the group consisting of a substituted or non-substituted aryl group and a substituted or non-substituted heteroaryl group and R.sub.1 to R.sub.9 are substituents. The 6H-indeno[2,1-b]quinoline derivative of the present invention is provided with thermal stability. Chemical compounds of the present invention are adequate for the materials of the light-emitting layer of an OLED device with high device performance. |