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Highly efficient tandem blue OLEDs based on fluorescent materials were developed for quantum dot OLED applications. We optimize the optical micro‐cavity structure for maximal efficiency, and the dependence of luminescence on the thickness uniformity is theoretically and experimentally confirmed with two different type of blue emitters. We also demonstrate that the selection of charge generation layer (CGL) and electrontransporting material adjacent to CGL have significant impact on the electroluminescence performance of the tandem blue OLEDs. Here, a two‐stack tandem blue OLED achieves a current efficiency of 13.3 cd/A with a CIE coordinate of (0.137, 0.047) and a blue index (BI) of 287, which is approximately 1.7 times higher than that of single unit.

A 1MV Tandem Proton Accelerator is being developed for the industrial applications such as high-energy implantation and explosive detection. The proton accelerator consists of a 10mA negative hydrogen ion source, two Einzel lens, accelerating tubes, a gas stripper, a 1MV 30mA Cockroft-Walton high voltage power supply, vacuum pumping system, and a high pressure insulating gas system. The large current proton beam can be accelerated in optical system, which is designed with simulation including space charge effect. The simple optical geometry is adapted for the optics design for the accelerator. The 2MV/m accelerating tube is being developed for this accelerator, and the detail of the accelerator development is reported.

There is an increasing attention paid to improving transparent conductive electrodes for applications in highly transparent and large area displays. We optimized top‐emitting blue organic light‐emitting diodes (TE‐BOLEDs) using hybrid cathode consisting of a thermally evaporated Mg/Ag capped with IZO. The device of cd/A/CIEy which used the hybrid cathode improved by 20% more than that with the identical organic layers and conventional Mg/Ag cathode. Meanwhile the transparency increased by 13% and sheet resistance decreased by half. Balancing the device performance, transparency and resistivities, different hybrid cathode structure could meet various requirements.

With the continued construction of information and smart grid for electric power sector, they are entering a big data era. The most immediate priority is to solve the big data storage for the power industry under massive amounts of data. The purpose of big data storage for electric power sector is not simple to show different patterns of data but also to provide guarantee for big data mining. The data storage models for electric power big data include the data model and the storage model. The paper states some optimal schemes for data storage in order to manage the electric power big data. At the same time, to improve the big data storage scheme further, some key techniques of index structure are introduced for electric power big data. The scheme for electric power big data storage and management is studied. Through combining big data with the electric power sector, storage architecture of power industry is designed.