| 초록 |
From the viewpoint of the light emitting material, the green and red materials are developed to some extent as excellent properties, but the blue material having a large band gap is recognized as a difficult technique as compared with other materials. In addition, there are very few low-molecular-weight phosphorescent blue materials, and it is difficult to apply blue material polymers to commercial products. Crystallization tends to proceed during amorphous thin film state or device driving, and deformation of the thin film by crystallization causes a decrease in luminance. Thus, in this study, we have shown that the introduction of bulky derivatives in three dimensions can inhibit the crystallization or formation of excimer and can have a beneficial effect in controlling the distribution of intramolecular electron density to maintain blue color purity . |
