非同期 MC-CDMA 시스템에서의 逆方向 채널 프레임 同期方式에 關한 硏究

학위논문(석사)--서울대학교 대학원 :전기공학부,2000.Maste

병렬기계의 일전계획을 위한 정수 최대흐름 모형에 관한 연구

Maste

반응성 상용화제를 포함한 고분자 블렌드의 상형태 및 계면현상

Docto

Poly(ethyl acrylate) poly(methyl methacrylate) semi-II IPN의 동적 물성 및 상형태

Maste

Lempel-Cohn-Eastman 시퀀스의 트레이스 표현 및 낮은 상관값을 갖는 새로운 이진 시퀀스군

Thesis (doctoral)--서울대학교 대학원 :전기·컴퓨터공학부,2004.Docto

가소제 첨가제가 고분자 반도체 물질의 기계적 성능에 미치는 영향에 관한 연구

MasterThe study of deformable organic semiconductor materials has been in the spotlight in the next generation of flexible device technologies. In particular, organic semiconductor materials can take advantage of being lightweight, deformable, and capable of large-area processing as a solution process itself, compared to silicon and metal-based technologies that are currently available in commercial devices. A deformable and stretchable material must satisfy not only a certain level of electrical performance but also various mechanical properties. Since it has to withstand mechanical forces in the tensile or compression direction, it is desired to implement a material system with good tensile toughness. In this study, a plasticizer additive is blended with a highly crystalline donor-acceptor type polymer with excellent electrical performance to significantly improve mechanical tensile stretchability while ensuring electrical mobility. And the cause of mechanical change is to be analyzed by various methods such as morphology, crystallinity analysis, and thermodynamic analysis. In addition, we would like to find a way to minimize electrical performance degradation in tensile situation by manufacturing stretchable Organic field-effect transistors (OFETs). In Chapter 2, the first half of the study, we set up a measurement capable of the tensile properties of nanoscale thickness of polymer thin film, and conducted experiments on the process for data validity. In Chapter 3, using phthalate-based plasticizers, the tensile performance of the highly-crystalline conjugate polymer DPP-DTT blend film was increased by more than 10%. Then, the cause is to be found by suggesting molecular behavior in tensile situation, through the stress-strain curve according to the plasticizer content, crystallinity analysis, and thermodynamic analysis