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Synthesis of Characterization of Diketopyrrolopyrrole-Based Organic Semiconducting Polymer For Thin Film Transistor and Nanowire Field Effect Transistor

초록/요약

Organic field-effect transistors (OFETs) are attracting attention because of their potential application in cheap, large-area, flexible electronic devices, such as bendable displays, complementary circuits, and radio-frequency identification tags (RFID). To this end, polymer semiconductors are particularly well-suited, due to their mechanical flexibility and facile processing. In the study, we successfully synthesized new low bandgap alternating copolymer containing dithienothiophene(DTT). This copolymer was highly crystalline and provide very promising charge transport phenomenon. Thermal analaysis, cyclic voltammetry, absorption spectroscopy and photoluminescence spectroscopy were employed to investigate their intrinsic materials properties. Eventually, we fabricated thin film transistors devices and polymer single nanowire nanoelectronic devices to study their semiconducting property.

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목차

1. 서 론 .......................................................................1
1. 1. 연구배경 및 목적 ....................................................1
1. 2. 공액형 고분자 (conjugated polymer) 물질의 개요.........5
1. 2. 1. 공액형 반도체 고분자 (conjugated semiconducting polymer)......................................................................5
1. 2. 2. Diketopyrrolopyrrole (DPP)를 포함하는 유기반도체 물질............................................................................8
1. 3. 유기 박막 트랜지스터(Organic Thin Film Transistor)...11
1. 3. 1. 유기 박막 트랜지스터의 구조..............................12
1. 3. 2. 유기 박막 트랜지스터의 동작 원리.......................15
1. 4. 고분자를 기반으로한 나노선 (Nanowire)의 개요..........19

2. 실 험......................................................................22
2. 1. 시약 및 기기..........................................................22
2. 2. 시료의 합성...........................................................23
2. 3. 측정기기의 사용 및 준비..........................................28

3. 결과 및 고찰.............................................................32
3. 1. 고분자의 합성 및 구조 확인......................................32
3. 2. 고분자의 열적 특성.................................................40
3. 3. 유기 전계-효과 트랜지스터로의 적용 시 특성과 성능...43
3. 3. 1. 광학적 특성 (UV-Vis 흡수 스펙트럼)....................43
3. 3. 2. 전기화학적 특성...............................................46
3. 3. 3. X-ray diffraction 측정 및 분석.............................49
3. 3. 4. Atomic Force Microscopy (AFM) 측정 및 분석.....54
3. 3. 5. 유기박막 트랜지스터 (organic thin film transistor) 의 특성........................................................................56
3. 4. 나노선(Nanowire)를 트랜지스터로의 적용 시 특성과 성능...............................................................................62
3. 4. 1. 고분자 나노선(Nanowire) 의 합성 및 형태 확인.....62
3. 4. 2. 나노선(Nanowire) Atomic Force Microscopy (AFM) 측정 및 분석.......................................................64
3. 4. 3. 나노선 트랜지스터 (Nanowire transistor) 의 특성..66

4. 결론........................................................................71

5. 참고문헌..................................................................72

6. 감사의 글................................................................75

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