Molecular ordering effect of a new small molecules for blue fluorescence OLEDs = Molecular ordering effect of a new small molecules for blue fluorescence OLEDs

다국어 초록 (Multilingual Abstract)

Organic light emitting diodes (OLEDs) have potential applications in next-generation electronics because of their advantages, including low driving voltage, wide view-angle, lightweight, and flexible large-area display and lighting. To improve device efficiency, syntheses with functional organic materials are required because high efficient charge injection and transport into OLEDs are the limiting factors in determining operating voltage and device efficiency. Although molecular orientation in organic photovoltaics (OPVs) and organic field-effect transistors (OFETs) have been investigated using grazing incidence X-ray diffraction (GIXD) analysis, the molecular orientation of the emitting material in OLEDs is still not unclear. Herein we focused on determining the molecular orientation change according to substituent position of core unit.