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首页> 外文期刊>Journal of coatings technology and research >Improvement of the electrical characteristics of polymer electroluminescent structures by using spray-coating technology
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Improvement of the electrical characteristics of polymer electroluminescent structures by using spray-coating technology

机译：通过喷涂技术改善聚合物电致发光结构的电特性

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In this article, polyphenylenevinylene derivative (poly(9,9-dihexyl-9H-fluorene-2,7-diyl-vinylene)) (PPV-D) thin films were deposited by spray deposition and spin-coating. Film morphology was investigated by scanning electron microscopy images and surface profile diagrams. The traps concentration depending on the deposition method was evaluated based on current-voltage characteristics of ITO/PPV-D/A1 structures measured at different temperatures. Brightness-voltage characteristics of the structures containing spray deposited and spin-coated PPV-D films with the same thickness were measured. The film surface at spray deposition tends to be uniform and smoother than the spin-coated one. The structure with sprayed polymer layer showed higher maximal trap factor (0.94 × 10~(-3) vs 0.83 × 10~(-3) for spin-coating), which is evidence for less defects in the bulk and presence of more free carriers, contributing to the conduction and the radiative recombination. Twice-higher luminance and 1.4 V lower turn-on voltage were achieved, using spray deposition in comparison with the spin-coating technique. The spray technique for polymer deposition is a very powerful tool for the preparation of cost effective organic-based devices with improved electrical characteristics and efficiency.
机译：在本文中，通过喷涂和旋涂法沉积了聚苯撑乙烯撑衍生物（聚（9,9-二己基-9H-芴-2,7-二甲苯基乙烯））（PPV-D）薄膜。通过扫描电子显微镜图像和表面轮廓图研究了膜的形态。根据在不同温度下测量的ITO / PPV-D / A1结构的电流-电压特性，评估取决于沉积方法的陷阱浓度。测量包含具有相同厚度的喷涂和旋涂PPV-D膜的结构的亮度-电压特性。喷雾沉积时的膜表面比旋涂膜的表面趋于均匀和光滑。喷涂聚合物层的结构显示出更高的最大捕集因子（旋涂时为0.94×10〜（-3），而旋涂为0.83×10〜（-3）），这表明本体缺陷较少，自由载流子更多，有助于传导和辐射复合。与旋涂技术相比，使用喷涂法可实现两倍高的亮度和1.4 V的较低开启电压。用于聚合物沉积的喷涂技术是一种非常强大的工具，可用于制备具有改进的电气特性和效率的经济高效的有机基器件。

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