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Two blue-emitting materials, 4-(12-([1,1′:3′,1″-terphenyl]-5′-yl)chrysen-6-yl)-N,N-diphenylaniline (TPA-C-TP) and 6-([1,1′:3′,1″-terphenyl]-5′-yl)-12-(4-(1,2,2-triphenylvinyl)phenyl)chrysene (TPE-C-TP), were prepared with the composition of a chrysene core moiety and terphenyl (TP), triphenyl amine (TPA), and tetraphenylethylene (TPE) moieties as side groups. The maximum photoluminescence (PL) emission wavelengths of TPA-C-TP and TPE-C-TP were 435 and 369 nm in the solution state and 444 and 471 nm in the film state. TPA-C-TP effectively prevented intermolecular packing through the introduction of TPA, a bulky aromatic amine group, and it showed an excellent photoluminescence quantum yield (PLQY) of 86% in the film state. TPE-C-TP exhibited aggregation-induced emission; the PLQY increased dramatically from 0.1% to 78% from the solution state to the film state. The two synthesized materials had excellent thermal stability, with a high decomposition temperature exceeding 460 °C. The two compounds were used as emitting layers in a non-doped device. The TPA-C-TP device achieved excellent electroluminescence (EL) performance, with Commission Internationale de L′Eclairage co-ordinates of (0.15, 0.07) and an external quantum efficiency of 4.13%, corresponding to an EL peak wavelength of 439 nm. [ABSTRACT FROM AUTHOR]

In this paper, we present the development of autonomous navigation capabilities for small cruise boats, and their verification by field experiments in a canal and its surrounding waters. A cruise boat was converted to an autonomous surface vehicle (ASV) by installing various sensors and actuators to enable autonomous navigation. Navigation and perception sensors, such as global positioning system, attitude and heading reference system, radar, light detection and ranging (LiDAR), and cameras, were mounted on the ASV to estimate its motion and perceive the surrounding environment. Motors and potentiometers were installed for active control of the ASV. Software system components including navigation filters, object‐detection, path‐planning, and control algorithms were designed and implemented. In the narrow canal region, LiDARs were used to detect the side walls and boundaries of the canal. In open areas outside the canal, obstacles and object features were detected using various combinations of onboard sensors. A model‐based path‐planning algorithm was designed to avoid the detected obstacles, and the line‐of‐sight guidance was employed to control the vehicle. The performance of the developed system was verified through a field experiment in a real‐world maritime environment. [ABSTRACT FROM AUTHOR]

White organic light-emitting diode (WOLED) containing new blue layer was fabricated with a simple device structure, which is deposited by 4-CbzBiz, Alq3, and DCM2 for blue, green, and red. Electroluminescence (EL) performance of WOLED showed current efficiency (CE) of 0.61 cd/A, power efficiency (PE) of 0.22 lm/W and external quantum efficiency (EQE) of 0.85%. The device exhibited EL max wavelength of 444, 511, and 638 nm. The device showed commission International de l'Eclairage (CIE) value of (0.30, 0.33) corresponding to cool white emission. This result can be used with an advantage in white lighting and display application by obtaining a high color rendering index. [ABSTRACT FROM AUTHOR]

Abstract: TiO2 thin film was deposited on non-heated Si(100) substrate by RF magnetron sputtering. The as-deposited films were annealed by a conventional thermal annealing (CTA) and rapid thermal annealing (RTA) at 700 and 800°C, and the effects of annealing temperature and method on optical properties of studied films were investigated by measuring the optical band gaps and FT-IR spectra. And we also compared the XRD patterns of the studied samples. The as-deposited film showed a mixed structure of anatase and brookite. Only rutile structures were found in samples annealed above 800°C by CTA, while there are no special peaks except the weak brookite B(232) peak for the sample annealed at (or above) 800°C by RTA. FT-IR spectra show the broad peaks due to Ti–O vibration mode in the range of 590–620cm−1 for the as-deposited film as well as samples annealed by both annealing methods at 700°C. The studied samples all had the peaks from Si–O vibration mode, which seemed to be due to the reaction between TiO2 and Si substrate, and the intensities of these peaks increased with increasing of annealing temperature. The optical band gap of the as-deposited film was 3.29eV but it varied from 3.39 to 3.43eV as the annealing temperature increased from 700 to 800°C in the samples annealed by CTA. However, it varied from 3.38 to 3.32eV as the annealing temperature increased from 700 to 800°C by RTA. [Copyright &y& Elsevier]