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유종현,( Suman Kalyan Samanta ),송인호,오준학 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Organic thin-film transistors (OTFTs) have suffered from insufficient mobility for commercial viability despite their intrinsic advantages such as light weight, flexibility and simple fabrication. Here, we report high performance OTFTs fabricated by simple solution processing of π -conjugated semiconducting copolymers based on [1]benzothieno [3,2-b]benzothiophene (BTBT) and perylene/naphthalene diimide (PDI/NDI) derivatives. The OTFTs showed n-channel dominant behaviors with superior mobility compared to that made of other copolymers based on PDI/NDI. The morphology and molecular packing of the copolymer thin films analyzed through atomic force microscopy (AFM) and grazing incidence X-ray diffraction (GIXD) together explained the high performance of OTFTs. Furthermore, the OTFTs exhibited phototransistor behaviors under visible light, showing potential of PDI / NDI copolymer-based OTFTs in photosensor application.
원유상,권오영,Suman Kalyan Samanta,유종현,오준학 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Strethcable, wearable, and bio-compatible soft electronic devices has been studied for its potential use in various applications, including prosthetics, soft robotics, and human-machine interfaces. Ionic conductive hydrogels are good candidates for surface-mount technology due to their excellent transparency and small resistance variation under high stretching states. Herein, we introduce a new type of stretchable self-healing and transparent touch sensor using hydrogel comprised of PVA, Borax, and poly(sodiumacrylate, NaAc). The hydrogel exhibits a fast self-healing capability which can restore over 95% of its initial conductivity within 7 s healing time. Moreover, no external stimuli (such as heat, pH, light, or catalyst) are required. The self-healing touch sensor is able to monitor the position of touch screens.