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首页> 外文期刊>Nano Energy >Transparent ultra-thin silver electrodes formed via a maskless evaporation process for applications in flexible organic light-emitting devices
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Transparent ultra-thin silver electrodes formed via a maskless evaporation process for applications in flexible organic light-emitting devices

机译：透明超薄银色电极通过无掩模蒸发过程形成，用于柔性有机发光装置中的应用

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摘要

We have fabricated flexible, transparent, ultra-thin silver (Ag) electrodes by using a maskless deposition process and applied them to organic light-emitting devices (OLEDs). A selective ultraviolet/ozone (UV/O-3) treatment was performed on the polyethylenimine (PEI) polymer layer, which contained amine groups and was coated onto a silicon substrate, in order to form an electrode pattern. An ultra-thin Ag film was deposited in vacuum on the UV/O-3-treated substrate without a mask, resulting in the formation of a flexible, transparent, ultra-thin Ag electrode pattern. The optimum PEI concentration and the optimum UV/O-3 treatment time for the formation of flexible, transparent, Ag electrode patterns were determined from their sheet resistances, optical transmittances, Fourier-transform infrared spectra and X-ray photoelectron spectra. The sheet resistance of the ultra-thin Ag electrode transferred to an epoxy substrate changed within 5% only when the bending diameter of curvature and the number of bending cycles were 5 mm and 3000, respectively. The current density and the luminance of an OLED with a flexible, transparent, ultra-thin Ag electrode deposited on an epoxy substrate were larger than those of an OLED with an indium-tin-oxide (ITO) electrode formed on a polyethylene naphthalate substrate. We have confirmed that the flexible, transparent, ultra-thin Ag electrodes hold promise for use in the fabrication of flexible OLEDs.
机译：我们通过使用无掩模沉积工艺制造了柔性，透明的超薄银（AG）电极，并将其施加到有机发光器件（OLED）上。在聚乙酰胺（PEI）聚合物层上进行选择性紫外/臭氧（UV / O-3）处理，其含有胺基并涂覆到硅衬底上，以形成电极图案。在没有掩模的UV / O-3处理的基板上真空沉积超薄Ag膜，导致形成柔性，透明的超薄Ag电极图案。从它们的薄层，光学透射率，傅立叶变换红外光谱和X射线光电子谱确定，最佳PEI浓度和用于形成柔性，透明的AG电极图案的最佳UV / O-3处理时间。当曲率的弯曲直径和弯曲循环的次数为5mm和3000时，将转移到环氧基质的超薄Ag电极的薄层电阻仅在5％内变化。用沉积在环氧基质上沉积在环氧基质上的柔性透明的超薄Ag电极的电流密度和亮度大于形成在聚对萘甲酸亚甲酸酯基质上的氧化铟锡（ITO）电极的电极的电极。我们已经证实，柔性透明，超薄AG电极保持在制造柔性OLED中的承诺。

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