Fiber-based wearable displays, one of the most desirable requisites of electronic textiles (e-textiles), have emerged as a technology for their capability to revolutionize textile and fashion industries in collaboration with the state-of-the-art electronics. Nonetheless, challenges remain for the fibertronic approaches, because fiber-based light-emitting devices suffer from much lower performance than those fabricated on planar substrates. Here, we report weavable and highly efficient fiber-based organic light-emitting diodes (fiber OLEDs) based on a simple, cost-effective and low-temperature solution process. The values obtained for the fiber OLEDs, including efficiency and lifetime, are similar to that of conventional glass-based counterparts, which means that these state-of-the-art, highly efficient solution processed planar OLEDs can be applied to cylindrical shaped fibers without a reduction in performance. The fiber OLEDs withstand tensile strain up to 4.3% at a radius of 3.5 mm and are verified to be weavable into textiles and knitted clothes by hand-weaving demonstrations. Furthermore, to ensure the scalability of the proposed scheme fiber OLEDs with several diameters of 300, 220, 120, and 90 μm, thinner than a human hair, are demonstrated successfully. We believe that this approach, suitable for cost-effective reel-to-reel production, can realize low-cost commercially feasible fiber-based wearable displays in the future.

Deformable organic light-emitting diode (OLED) based optoelectronic devices hold promise for various wearable applications including biomedical systems and displays, but current OLED technologies require high voltage and lack the power needed for wearable photodynamic therapy (PDT) applications and wearable displays. This paper presents a parallel-stacked OLED (PAOLED) with high power, more than 100 mW/cm 2 , at low voltage (<8 V). The current dispersion ratio can be tuned by optimizing the structure of the individual OLEDs stacked to create the PAOLED, allowing control of the PAOLED's wavelength shapes, current efficiency, and power. In this study, a fabricated PAOLED operated reliably for 100 h at a high power of 35 mW/cm 2 . Confirming its potential application to PDT, the measured singlet oxygen generation ratio of the PAOLED was found to be 3.8 times higher than the reference OLED. The high-power PAOLED achieved a 24% reduction in melanoma cancer cell viability after a short (0.5 h) irradiation. In addition, a white light PAOLED with color tuning was realized through OLED color combination, and a high brightness of over 30 000 cd/m 2 was realized, below 8.5 V. In conclusion, the PAOLED was demonstrated to be suitable for a variety of low-voltage, high-power wearable optoelectronic applications.

One-dimensional quantum rods (QRs) have the properties of the electron and hole are separated under the electric field, the overlap of the wave function decreases, and photoluminescence quenching occurs. Because of these properties, QRs can be used in optical switching and future display applications. The CdZnS/ZnS QR is a material capable of emitting blue light. CdZnS/ZnS can easily separate carriers because the difference between the valence band of the core and the shell is small. However, CdS and ZnS have very low hole conductivity and cannot easily be separated. To solve this problem, we developed an in situ doping system and demonstrated nitrogen doping. The in situ doping system not only coats ZnS onto CdZnS QR but also proceeds with nitrogen doping. Previously studied doping methods additionally doped the synthesized nanomaterials and had no effect of doping because the dopant was not dispersed without subsequent heat treatment. However, the in situ doping system grows the ZnS shell and uniformly dopes the nitrogen. This means that no additional heat treatment is required. The effect of doping gradually increases in proportion to the amount of dopant and the PL quenching increases, even though the aspect ratio is decreased.

Compared to the past, today's Korean art market has grown significantly in terms of quantity, with more than 10 million people visiting concert halls in a year. However, in reality, most of the audience is limited to a certain social class.The recent deepening social polarization, increase in economic inequality, disintegration of families, and conflicts due to the increase in migrants from various cultural backgrounds act as factors that hinder the solidarity and integration of our society. Countries establish and operate public performance venues by investing public resources to realize cultural democracy while providing arts to all citizens evenly regardless of class. However, publicly funded arts institutions often involve a small, well-educated public. Audience development has also been targeted primarily at current and potential audiences based on traditional marketing theories. However, this audience development does not lead to a change in the sustainable participation of those excluded from the social structure. Recognizing these issues, this study proposes approaches, participation, cultural diversity, and art education as a way to realize the demand for audience development from a socially inclusive perspective.