| 초록 |
Two different hetero atoms containing (S, O) rings were introduced into the phenanthroimidazole moiety to obtain the efficient blue emitting luminogens. Both the synthesized compounds showed good thermal stability which is necessary for the LEC fabricating material. The photoluminescence quantum yields are good for both the compounds. Moreover, the LEC devices fabricated show strong blue emission in 459 and 461 nm for devices 1 and 2 respectively. The CIE graph show good intensity for the devices 1 and 2 at (0.18,0.22) and (0.19,0.19) respectively. Comparing the brightness, the compound 2 shows better brightness of 1289 than that of compound 1 of 1177 cd m-2. The current density is also higher for the compound 2 which shows 342, when the compound 1 shows a current density of 166 mA cm-2. |
