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.
We purposed to fabricate an organic light-emitting device (OLED) using an Ag fiber electrode embedded in a polyvinyl butyral (PVB) substrate. Since the electrode is embedded in a flexible polymer substrate, the surface roughness is very low. Moreover, since the depth of the electrode can be freely adjusted, the resistance can be very low without decreasing the transmittance. As a result, we demonstrated that a OLED with external quantum efficiency of 10 % was successfully fabricated.
We have designed a ten-year prospective cohort study in semiconductor workers of South Korea. We aimed to determine the relationship between occupational exposure and not only cancers but also diseases related to reproductive toxicity such as spontaneous abortion and others. Further, we’re planning to establish a monitoring and surveillance system for the known and the unknown hazards like unexpected by-products. We were approved from Korea National Institute for Bioethics Policy (KoNIBP) for cohort establishment in July 2017. We held cohort information session of over two hundred times for entire employees. In these sessions, the employees were encouraged to participate to the cohort study with full explanation related to the establishment of cohort system including the necessity, value, and vision of the system. The consent form was included specific sub-categories depending on the characteristics and source of personal and sensitive information to be used. A total of 22 490 employees were agreed to participate to SHE (SKHynix Employees) cohort (the participation rate: 93 percent) and we built up the foundation of the cohort with these higher rates. Various data included in the consent form, such as personnel information, health examination information, and job exposure matrix (JEM) and others were collected and refined to identify health status of our employees. The cohort was built on the basis of the need of our own healthcare system, and the establishment and the analyses of cohort DB are expected to deduct of the high risk group through tracking and monitoring for risk factors and major diseases. It is also expected proactive prevention through blocking potential risks.
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