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Because of the low-cost, all-solid-state, active light-emitting, high brightness, high contrast, wide viewing angle, fast response, thin, low-voltage DC drive, low power consumption, wide operating temperature range, can achieve the soft-screen display, The organic electroluminescent display technology is considered to be one of the most promising next-generation display technology. OLED technology, there are still some drawbacks, the most prominent defect is its relatively short life, which makes OLED want to completely replace the LCD still take some time. Effective encapsulation of OLED is to solve these problems and to improve the life of the most direct and effective manner. To solve this problem, we carry out the following work: 1. Synthesis mechanism of poly-the xylene (Parylenes) thin films, we designed and set maximum deposition area of ??5cm × 5cm vacuum chemical vapor deposition apparatus. Vacuum chemical vapor deposition apparatus, respectively deposited in different conditions of the polyparaxylene-based film, and the use of scanning electron microscopy (SEM), infrared spectroscopy (IR), the water permeability test and ultraviolet-visible spectroscopy (UV-vis) test related performance of the film. The deposition conditions (the deposition pressure, reaction time and other factors) on the film deposition rate, the composition of the impact of composition, mechanical properties and the thin film quality and other aspects. The experimental results show that: the best conditions of the preparation of poly xylene film deposition pressure of P ≤ 5Pa, deposition time 10min ~ 30min. Dense smooth film surface, the permeation rate of 0.0228 g / m to 2 · day or up to 90% the average transmittance in the visible region; optimum deposition conditions of the preparation of poly-chloro-paraxylene film deposition pressure P ≤ 5Pa deposition time 10min. The dense surface of the resulting film formation, the permeation rate of 0.0041 g / m to 2 · day or up to 97%, the average transmittance in the visible region. 3 by vacuum evaporation prepare the classic OLED devices: ITO / TPD (40nm) / Alq3 (70 nm) / LiF (0.8nm) / Al (150nm), using vacuum chemical vapor deposition apparatus prepared polyparaxylylene class The film used in the device package. The results show that the package (both poly xylene thin film encapsulation or poly-chloro-p-xylene film package) device can make the working life of the device has been significantly improved. Unencapsulated device life is 197 h at room temperature, and after poly xylene film encapsulation life after 1215 h, polychlorotrifluoroethylene xylene after the thin film encapsulation of device life of 1558 h, encapsulation before and after the life can be extended ~ 8 times. In addition, in order to improve the mechanical strength of the package material, stability and reduce the dielectric constant of the material, in the structure of the above-mentioned material, attempts to replace the chlorine atom with a fluorine atom, to 2 - fluoro-1 ,4 - xylene a starting material, via the side chain bromide, quaternized and Hoffman degradation method own synthesis difluoro [2,2] cyclo Second Fan, respectively, using magnetic resonance (to 1H-NMR), mass spectrum MS, infrared IR, elemental analysis and melting point test method confirmed its chemical structure, and the effects of a variety of factors that affect the reaction, to explore the optimal reaction conditions.
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