Fabrication of junction‐free Ag fiber electrodes for flexible organic light‐emitting diodes (OLEDs) is demonstrated. The junction‐free Ag fiber electrodes are fabricated by electrospun polymer fibers used as an etch mask and wet etching of Ag thin film. This process facilitates surface roughness control, which is important in transparent electrodes based on metal wires to prevent electrical instability of the OLEDs. The transmittance and resistance of Ag fiber electrodes can be independently adjusted by controlling spinning time and Ag deposition thickness. The Ag fiber electrode shows a transmittance of 91.8% (at 550 nm) at a sheet resistance of 22.3 Ω □⁻¹, leading to the highest OLED efficiency. In addition, Ag fiber electrodes exhibit excellent mechanical durability, as shown by measuring the change in resistance under repeatable mechanical bending and various bending radii. The OLEDs with Ag fiber electrodes on a flexible substrate are successfully fabricated, and the OLEDs show an enhancement of EQE (≈19%) compared to commercial indium tin oxide electrodes.

中文翻译：

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适用于柔性有机发光二极管的无结静电纺银纤维电极

演示了用于柔性有机发光二极管（OLED）的无结Ag纤维电极的制造。无结的Ag纤维电极是由电纺聚合物纤维制成的，用作蚀刻掩模和湿法蚀刻Ag薄膜。此过程有助于控制表面粗糙度，这在基于金属线的透明电极中很重要，以防止OLED的电不稳定。通过控制纺丝时间和Ag沉积厚度，可以独立地调节Ag纤维电极的透射率和电阻。在22.3Ω□ ^-1的薄层电阻下，Ag纤维电极的透射率为91.8％（在550 nm），从而实现最高的OLED效率。另外，银纤维电极表现出优异的机械耐久性，如通过在可重复的机械弯曲和各种弯曲半径下测量电阻的变化所示。成功地制造了在柔性基板上具有Ag纤维电极的OLED，并且与市售的铟锡氧化物电极相比，该OLED的EQE增强（约19％）。