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New host materials have been designed and synthesized, (4-(10-(naphthalen-2-yl)anthracen-9-yl)phenyl)triphenylsilane (ANPTPS) and (9,9-dimethyl-7-(10-(naphthalen-2-yl)anthracen-9-yl)-9H-fluoren-2-yl)triphenylsilane (ANFTPS), and photophysical characteristics investigated to determine suitability as candidates for blue light-emitting materials. To explore the electroluminescent properties, multilayered OLEDs were fabricated with the device structure of ITO/NPB/Host (ANPTPS and ANFTPS): 8% Dopant (PFVtPh and PCVtPh)/Bphen/Liq/Al. By using a host (ANPTPS) and a dopant (PFVtPh) as the emitting layer, high-efficiency blue OLEDs were fabricated with a maximum luminance of 3991 cd/cm2 at 8.0 V, a luminous efficiency of 5.99 cd/A at 20 mA/cm2, a power efficiency of 3.11 lm/W at 20 mA/cm2, an external quantum efficiency of 4.13% at 20 mA/cm2, and CIEx, y coordinates of (x = 0.15, y = 0.18) at 8.0 V.
Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.