Korea Advanced Institute of Science and Technology · Engineering
배병수 교수 연구실은 유연하고 투명한 전자소자에 적합한 신소재 기반의 하이브리드 구조물 개발에 초점을 맞추고 있습니다. 특히 셀룰로오스 유래 콜로이드성 나노섬유 기반 투명 페이퍼, 유리섬유 강화 복합재, 은 나노와이어 등 고성능 투명 전도 필름과 기판을 개발하여 유연·접이식 전자소자 및 태양전지의 안정성과 성능을 극대화하고자 합니다. 생분해성 소재와 고온 안정성, 기계적 내구성을 동시에 확보한 신소재 플랫폼을 중심으로 미래형 웨어러블 및 그린 전자기기의 핵심 소재 기술을 선도하고 있습니다.
Figures are computed from collected data and may differ slightly.
A transparent paper made of chitin nanofibers (ChNF) is introduced and its utilization as a substrate for flexible organic light-emitting diodes is demonstrated. Given its promising macroscopic properties, biofriendly characteristics, and availability of the raw material, the utilization of the ChNF transparent paper as a structural platform for flexible green electronics is envisaged.
One of the key breakthroughs enabling flexible electronics with novel form factors is the deployment of flexible polymer films in place of brittle glass, which is one of the major structural materials for conventional electronic devices. Flexible electronics requires polymer films with the core properties of glass (i.e., dimensional stability and transparency) while retaining the pliability of the polymer, which, however, is fundamentally intractable due to the mutually exclusive nature of these
As demands for high pixel densities and wearable forms of displays increase, high-resolution printing technologies to achieve high performance transistors beyond current amorphous silicon levels and to allow low-temperature solution processability for plastic substrates have been explored as key processes in emerging flexible electronics. This study describes electrohydrodynamic inkjet (e-jet) technology for direct printing of oxide semiconductor thin film transistors (TFTs) with high resolution
We report on the performance of an all-in-one flexible hybrid conducting film employing a monolithically embedded AgNW transparent electrode and a high-performance glass-fabric reinforced composite substrate (AgNW-GFRHybrimer film). Specifically, we perform in-depth investigations on the stability of the AgNW-GFRHybrimer film against heat, thermal oxidation, and wet chemicals to demonstrate the potential of the hybrid conducting film as a robust electrode platform for thin-film optoelectronic de
A novel high-performance transparent glass-fabric reinforced composite film that can be used as a substrate for flexible devices is introduced (see Figure). The composite film exhibited a low CTE (13 ppm K−1), high optical transparency (89%), high thermal stability (378 °C) and excellent flexibility (rollable). The performance of the composite film was successfully tested by fabrication of IGZO TFT and amorphous Si-based solar cells
We report a novel flexible hybrid plastic film that can be used as a robust electrode platform for typical thin-film optoelectronic devices. Silver nanowires (AgNWs) were embedded on the surface of a glass-fabric reinforced transparent composite (GFRHybrimer) film to form a flexible transparent conducting substrate with excellent opto-electrical properties, superior thermal stability, and impressive mechanical flexibility. A highly efficient and flexible inverted organic solar cell with a power
UV curable cycloaliphatic epoxy functionalized oligosiloxane resin is synthesized by non-hydrolytic sol–gel reaction for application in encapsulation of organic light emitting devices (OLEDs). The physical and chemical properties of polymerized cycloaliphatic epoxy hybrid materials (hybrimers) are easily tunable by controlling the precursors. A single hybrimer coating on a PET film is optically transparent and shows low permeability of up to 0.68 g m−2 day−1 per mil measured by a Ca degradation
Full-color mesophase silicate thin film phosphors incorporated with rare earth ions and photosensitizers exhibit multicolor photoluminescence that covere the whole visible range under UV excitation. The multiple colors can be finely tuned by varying the relative concentrations of the RE trivalent ions and photosensitizers. The mesophase silica thin films have promising applications in display field.
We report a high-performance, flexible and robust metal nanotrough-embedded transparent conducting hybrid film (metal nanotrough-GFRHybrimer). Using an electro-spun polymer nanofiber web as a template and vacuum-deposited gold as a conductor, a junction resistance-free continuous metal nanotrough network is formed. Subsequently, the metal nanotrough is embedded on the surface of a glass-fabric reinforced composite substrate (GFRHybrimer). The monolithic composite structure of our transparent con
Copper phosphate glasses with 40, 50, and 60 mol% CuO in batch were melted in air at 1000°, 1100°, and 1200°C using quartz or alumina crucibles, and the [Cu 2+ ]/[Cu total ] ratio variations with melting time were measured. Glasses were oxidized during melting and reached equilibrium [Cu 2+ ]/[Cu total ] ratios which were independent of melting temperature and identical for the 40 and 50 mol% CuO content glasses. Structural considerations seemed to have determined oxidation‐reduction equilibrium
A UV-curable epoxy–siloxane hybrid material (epoxy hybrimer) was fabricated by photo-cationic polymerization of a sol–gel derived cyclo-aliphatic epoxy oligosiloxane (CAEO) blended with oxetane cross-linker in the presence of an onium salt. Antioxidants for fabrication of the UV-curable epoxy hybrimer with high thermal resistance against yellowing were incorporated in the UV-curable epoxy hybrimer. The UV-curable epoxy hybrimer with the antioxidants showed high thermal resistance without yellowi
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