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Mincheol Chang(장민철) 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Conjugated polymer (CP)-based organic field effect transistors (OFETs) have been considered as potential candidates for gas sensing applications because of their unique advantages, such as light weight, multiparameter accessibility, ease of large-scale fabrication, and superior sensing capability enabled by gate-tunable current modulation. Recent studies have demonstrated the successful application of CP-based OFETs in gas sensors and have highlighted the urgency for improving the charge mobility and morphological features of the CP films for enhancing the performance of these sensors toward their practical applicability. This talk will demonstrate novel processing strategies for tuning the morphologies and charge transport properties of CP thin films, resulting in significant improvement in gas sensing performance of the CP film-based OFET gas sensors.
장민철(Mincheol Chang),문석하(Seokha Moon),김진규(Jinkyu Kim) ICT플랫폼학회 2023 ICT플랫폼학회 하계학술발표대회논문집 Vol.10 No.2
멀티뷰 카메라 영상을 사용한 자율주행 객체 탐지 알고리즘은 2차원의 정보를 3차원 조감도 (Bird’s-Eye-View) 좌표계로 바꾸어 물체인식을 진행한다. 그러나, 카메라 기반 객체 탐지 모델은 2차원 영상의 깊이 정보를 추정하기 어려움이 있고 부정확한 조감도 정보가 생성되므로 심각한 물체 오탐지가 발생한다. 본 연구에서는 기존 멀티뷰 카메라 기반 객체인식 모델의 거리추정 정확성과 조감도 상의 특징정보를 향상시키고자 지도 정보를 2D에서 3D 전환 과정에 융합해 3D 객체 인지 성능을 향상시키는 AI 모델을 개발하였다. 본 연구는 2023년도 대한전자공학회 하계학술대회 및 IEEE/CVF Winter Conference on Applications of Computer Vision 2024에서 발표됨.
서로 다른 위치 규칙성을 가지는 두 개의 Poly(3-hexylthiophene) 공액 고분자를 기반으로 한 고분자 복합 박막의 구조와 전기적 특성에 대한 연구
정강훈,Nann Aye Mya Mya Phu,박래수,윤정우,고영운,장민철,Ganghoon Jeong,Nann Aye Mya Mya Phu,Rae-Su Park,Jeong Woo Yun,Yeongun Ko,Mincheol Chang 한국복합재료학회 2023 Composites research Vol.36 No.5
Poly(3-hexylthiophene) (P3HT) is a conjugated polymer that is highly soluble in organic solvents and is readily available. However, its electrical properties as an active channel in electronic devices are not enough for practical applications, necessitating further improvement in the properties. In this study, we demonstrate that the blending of two P3HT polymers (i.e., regio-regular (RR) P3HT and regio-random (RRa) P3HT) with different regioregularities can significantly improve charge transport characteristics of the blend films. The morphological and electrical properties of the blend films were systematically investigated by varying the ratio between two P3HT polymers. Atomic force microscopy (AFM), X-ray diffraction (XRD), and UV-visible absorption spectroscopy (UV-vis) were employed to evaluate the morphological and optoelectronic properties of the blend films. The crystallinity of the blend films increased with increasing the content of RRa-P3HT to 20 wt% and gradually decreased as the content increased to 80%. Consistently, the highest charge carrier mobility was obtained from the blend films containing 20 wt% RRa-P3HT, which value was measured to be 0.029 cm<sup>2</sup>/V·s. The values gradually decreased to 0.0007 cm<sup>2</sup>/V·s with increasing the content of RRa-P3HT to 80 wt%.