Abstract
Electrospun metal fiber is a promising flexible transparent electrode owing to its extremely long length and facile fabrication process. However, metal-fiber electrodes have problems with chemical and thermal stability and nonuniform emission in organic light-emitting diode (OLED) at low luminance. In this study, we proposed a Ag fiber/IZO composite electrode with high stability. Ag fiber/IZO composite electrodes exhibited chemical and thermal stability. In addition, it was demonstrated that the OLED with the Ag fiber/IZO composite electrode operated stably, and the uniform emission of the OLED with metal-fiber electrodes improved by using highly conductive IZO film.
Highlights
Electrospun metal fiber is a promising flexible transparent electrode owing to its extremely long length and facile fabrication process
Junction-free electrospun metal-fiber electrodes have been applied to thin film devices, including organic solar cell and organic light-emitting diodes (OLEDs), because they can control the surface roughness, which is a serious problem of metal nanowires[15,16,17,18]
Metal fiber electrodes are vulnerable to post-heat and -chemical treatments that can occur after the electrode fabrication in the device fabrication process
Summary
Junhee Choi[1], Cheol Hwee Park[1], Jin Ho Kwack[1,2], Dong Jun Lee[1], Jae Geun Kim[1], Jaemyeong Choi[1], Bong Han Bae[1], Soo Jong Park[1], Enjung Kim[1], Young Wook Park3 & Byeong-Kwon Ju1. Metal-fiber electrodes have problems with chemical and thermal stability and nonuniform emission in organic light-emitting diode (OLED) at low luminance. It was demonstrated that the OLED with the Ag fiber/IZO composite electrode operated stably, and the uniform emission of the OLED with metal-fiber electrodes improved by using highly conductive IZO film. Junction-free electrospun metal-fiber electrodes have been applied to thin film devices, including organic solar cell and organic light-emitting diodes (OLEDs), because they can control the surface roughness, which is a serious problem of metal nanowires[15,16,17,18]. A sputtered IZO film that does not act as a planarization layer can be used as a buffer layer on a junction-free Ag fiber electrode with low surface roughness for stable OLED operation. The uniform emission of the OLED with a Ag fiber electrode can be achieved by depositing the IZO film, which has a resistance equal to that of the Ag fibers because the Ag fiber/IZO composite electrode has a parallel resistance of two materials—Ag fiber and IZO film
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