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학술지 Printable Ultra-Flexible Fluorinated Organic-Inorganic Nanohybrid Sol-Gel Derived Gate Dielectrics for Highly Stable Organic Thin-Film Transistors and Other Practical Applications
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권혁진, Heqing Ye, 백용화, 홍지수, Rixuan Wang, 최용환, 이일금, 박찬언, 남수지, 김주영, 김세현
Advanced Functional Materials, v.31 no.10, pp.1-15
20PB1800, 플렉시블 OLED 디스플레이용 산화물 TFT를 위한 고특성 습식 절연소재 및 공정기술 개발, 남수지
A novel fluorinated organic?밿norganic (O?밒) hybrid sol?봥el based material, named FAGPTi, is successfully synthesized and applied as a gate dielectric in flexible organic thin-film transistors (OTFTs). The previously reported three-arm-shaped alkoxysilane-functionalized amphiphilic polymer yields a stable O?밒 hybrid material consisting of uniformly dispersed nanoparticles in the sol-state. Here, a fluorinated precursor is introduced into the system, making it possible to realize more stable spherical composites. This results in long-term colloidal stability (≈1.5 years) because composite growth is strongly inhibited by the presence of fluorine groups with intrinsically strong repulsive forces. Additionally, the FAGPTi film is easily deposited via thermally annealed sol?밽el reactions; the films can be successfully fabricated through the printing method, and exhibit excellent flexibility and enhanced insulating properties compared to existing materials. OTFTs with FAGPTi layers show highly stable driving characteristics under severe bending conditions (1.9% strain). Integrated logic devices are also successfully operated with these OTFTs. Additionally, it can facilely be applied to amorphous indium-gallium-zinc-oxide (a-IGZO) TFT devices other than OTFT. Therefore, this synthetic strategy can provide useful insights into the production of functional O?밒 hybrid materials, enabling the efficient fabrication of electronic materials and devices exhibiting these properties.
KSP 제안 키워드
Colloidal stability, Dispersed nanoparticles, Driving Characteristics, Electronic materials and devices, Highly stable, Insulating properties, Organic thin-film transistors (otfts), Organic-inorganic nanohybrid, Printing method, Repulsive force, Severe bending