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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 백강준
- 발행연도
- 2019
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Printed and flexible electronics based on soluble conjugated organic molecules have drawn
tremendous interest as a new paradigm for the fabrication of large-area and low-cost
optoelectronics and electronics applications. Those polymers should be preferably aligned in
the perpendicular direction through the active channel of organic field-effect transistors
(OFETs). Morphological control and structural ordering of the conjugated polymers via large
area printing method is an important issue in order to achieve high performance OFETs and
its electronic circuitry. In this study, we report various directional printing methods (off-centered
spin-coating, dip-coating, and bar-coating) for preferable arrangement of conjugated polymers,
such as high mobility PCDTFBT and DPPT-TT. Those polymer OFETs showed high charge
carrier mobilities as high as 11 cm2V
-1s
-1 and balanced ambipolar charge transport behavior
in the top-gated OFET structure with polymer dielectrics. This remarkable enhancement is
mostly attributed to improved arrangement and ordering of polymer chains through the active
channel and better uniformity of OFET parameters is also obtained by this large-area printing
techniques. Moreover, high-k fluorinated polymer dielectrics significantly contribute to
increase high charge carrier density under low voltage conditions. Finally, higher mobilities
and well-balanced P-channel and N-channel characteristics in comparison to conventional
coating methods was successfully applied to develop complementary-like printed circuits, it is
expected to be realize high performance flexible and wearable electronic devices via costeffective
simple printing methods.
tremendous interest as a new paradigm for the fabrication of large-area and low-cost
optoelectronics and electronics applications. Those polymers should be preferably aligned in
the perpendicular direction through the active channel of organic field-effect transistors
(OFETs). Morphological control and structural ordering of the conjugated polymers via large
area printing method is an important issue in order to achieve high performance OFETs and
its electronic circuitry. In this study, we report various directional printing methods (off-centered
spin-coating, dip-coating, and bar-coating) for preferable arrangement of conjugated polymers,
such as high mobility PCDTFBT and DPPT-TT. Those polymer OFETs showed high charge
carrier mobilities as high as 11 cm2V
-1s
-1 and balanced ambipolar charge transport behavior
in the top-gated OFET structure with polymer dielectrics. This remarkable enhancement is
mostly attributed to improved arrangement and ordering of polymer chains through the active
channel and better uniformity of OFET parameters is also obtained by this large-area printing
techniques. Moreover, high-k fluorinated polymer dielectrics significantly contribute to
increase high charge carrier density under low voltage conditions. Finally, higher mobilities
and well-balanced P-channel and N-channel characteristics in comparison to conventional
coating methods was successfully applied to develop complementary-like printed circuits, it is
expected to be realize high performance flexible and wearable electronic devices via costeffective
simple printing methods.
목차
I. 서론 1II. 이론 31.유연전자 공학 (Soft Electronics) 32.인쇄전자 소재 (Printed Electronics Materials) 4가. 유기 반도체 재료 4나. 탄소나노튜브 (Carbon Nano Tube) 73. 인쇄 집적 회로 (Printed Integrated Circuits) 10가. 유기 전계 효과 트랜지스터 10(1) 유기 전계 효과 트랜지스터의 구조 11(2) 유기 전계 효과 트랜지스터의 동작원리 13(3) 유기 전계 효과 트랜지스터의 전기적 특성 평가 15나. Ambipolar OFET 18다. CMOS-like ambipolar inverter 204. 고성능 유연인쇄전자 회로 제작 22가. 잉크젯 프린팅 (Ink-jet Printing) 22나. 오프-센터 스핀코팅 (Off Center Spin Coating) 24다. 바코팅 (Bar Coating) 26Ⅲ. 실험 및 분석 281. 실험 재료 28가. 고분자 반도체 28(1) (PFT-100) 28(2) (DPP-DTT) 28나. 고분자로 wrapping 된 CNT 302. 실험 방법 32가. TFT 기판 제작 32나. 코팅 공정 34다. Thermal Evaporation Deposition 353. 특성 분석 37가. Atomic Force Microscope (AFM) 37나. UV-Visible Spectroscopy 38다. Raman spectroscopy 39Ⅳ. 결과 및 고찰 411. 고분자 반도체 박막 특성 41가. Atomic Force Microscope (AFM) 41나. UV-Visible Spectroscopy 412. CNT 반도체의 구조 특성 분석 (Raman) 433. 전기적 특성 47가. 고분자 반도체의 분자 배향 47나. Ambipolar OFET 52다. CMOS-like ambipolar inverter 60Ⅴ. 결론 64참고문헌 67
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