Efficient blue fluorescent organic light-emitting diodes based on novel 9,10-diphenyl-anthracene derivatives

Abstract

Efficient blue fluorescent organic light-emittingdiodes based on novel 9,10-diphenyl-anthracene derivativesFive 9,10-di(naphthalen-2-yl)anthracene (ADN) derivatives with fluorenamine or indenocarbazole moiety have been successfully developed for blue emitters of OLEDs. All materials showed good chemical and thermal stability, moreover the OCADN based device exhibited highly efficient sky-blue emission with current efficiency of 2.25 cd/A, power efficiency of 1.13 lm/W and CIE(x,y) coordinate of (0.16, 0.30) at 8 V.A series of novel 9,10-di(naphthalen-2-yl) anthracene (ADN) derivatives were designed and synthesized as blue fluorescent emissive materials by inducing diverse aromatic groups to C-2 position of ADN. UV-Vis absorption, fluorescence emission spectroscopy and cyclic voltammetry (CV) were carried out to generally investigate the relationships between the physical properties and molecular structures. Moreover, four non-doped OLED devices adopting OCADN, FA3PADN, FA4PADN and OC4PADN as emitting materials were fabricated to study their electroluminescence (EL) performances. Among them, device based on OCADN exhibited highly efficient sky-blue emission with current efficiency of 2.25 cd/A, power efficiency of 1.13 lm/W and CIE(x,y) coordinate of (0.16, 0.30) at 8 V. In addition, the device of OC4PADN showed efficient blue emission with CIE(x,y) coordinate of (0.16, 0.14) at 8 V.

A chromatography-free total synthesis of a ferrocene-containing dendrimer exhibiting the property of recognizing 9,10-diphenylanthracene

“…Having known the above discussed specificity and inspired by the fact that 9,10-diphenylantracene can be used as a template during the synthesis steps of Fc-den (Fig. 3b), we began to engineer the application of Fc-den as the building unit of an analytical device dedicated to the specific recognition of 9,10-DPA, a polycyclic aromatic hydrocarbon (PAH) commonly used in, e.g., the technologies of organic light emitting diods 31,32 . The analytical characteristics of the sensor (GC/Fcden-TBAHFP-nafion®), which has been fabricated as noted above, were determined electrochemically on the basis of the changes in the Fc-den oxidation current signal.…”

Synthesis, characterization, solvatochromic, and electrochemical investigation of novel 4- methyl coumarin fused azo dyes as an NLO material and their biological studies

“…Powder diffraction data were collected to characterize the structure of the synthesized compounds. Recently, X-ray powder diffraction data has been more frequently utilized for determining the structure of compounds that do not form high-quality single crystals [51]. "The indexing procedures were performed using the (CCP4, UK) CRYSFIRE program giving cubic and Rhombohedral system for 1a and 1b compounds respectively", hexagonal for 1c and cubic for 1d as the best solutions (Figure 6).…”

Facile synthesis of 2-aza-9,10-diphenylanthracene and the effect of precise nitrogen atom incorporation on OLED emitters performance

“…5a), following a similar design to what has been used elsewhere to study this family of molecules. [19][20][21][22] The first organic layer, 4,4 0 -N,N 0 -bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB) (30 nm), was deposited directly onto an indium tin oxide (ITO, anode) substrate as a hole transport layer (HTL). NPB is commonly used in commercial OLED applications due to its excellent hole transport properties as its relatively high-lying HOMO level (À5.5 eV) minimizes the hole injection barrier from the ITO anode (À4.7 eV).…”