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A patterned inverted cone (PIC) structure on flexible substrate produced by focused femtosecond laser was demonstrated for the out-coupling efficiency enhancement of electroluminescent devices. A green Organic Light-Emitting Diode (OLED) with PIC structure on flexible substrate was employed to verify the effect of the proposed method, which exhibited a current efficiency enhancement by a factor of 2.2 at 10 mA/cm2 without any emission spectrum altered, compared with conventional flexible OLED. The PIC structure is compatible with current device fabrication process and applicable for full color OLED display and lighting. [ABSTRACT FROM AUTHOR]

The structure of niobium-doped SrBiTiO was calculated by using density function and discrete variation method (DFT-DVM). By comparing the total energy of different doping sites, the total energy is found to be lower when Nb ion was substituted into the Ti site in the upper perovskite layer, which is far from the two bismuth (Bi) ions in the perovskite layer. The bonding strength of Nb (3)-O increases and the electronic conductivity of the SBT decreases after Nb doping. © 2009 Wiley Periodicals, Inc. Int J Quantum Chem, 2011 [ABSTRACT FROM AUTHOR]

In this paper, the microwave-assisted molten salt method (MAMSS) and molten salt method (MSS) were used to synthesize SrBi4Ti4O15 (SBT). The phase constitution was determined by powder X-ray diffraction and the microstructure of powder was examined by scanning electron microscopy. In contrast to the conventional MSS method, MAMSS produces more distinct plate-like grains and synthesizes both SBT and Bi4Ti3O12 (BTO) at 600°C with a 30-min soaking time. The increase of temperature and soaking time can make the plate-like grains of BTO more distinct. [ABSTRACT FROM AUTHOR]