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학술지 Cone-jet Printing of Aligned Silver Nanowire/poly(ethylene oxide) Composite Electrodes for Organic Thin-film Transistors
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저자
Xinlin Li, 김경훈, 오환, 문홍철, 남수지, 김세현
발행일
201906
출처
Organic Electronics, v.69, pp.190-199
ISSN
1566-1199
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.orgel.2019.03.025
협약과제
19ZB1200, 임플란터블 능동 전자소자 원천기술 개발, 이정익
초록
Aligned silver nanowire (AgNWs) conductive electrodes are printed through an electrohydrodynamic (EHD) jet printing via cone-jet mode. We investigate effects of poly(ethylene oxide) (PEO) addition to AgNW inks in terms of surface energy, ink viscosity, and electrical conductivity. The optimized PEO content in the ink is determined to be ~10 wt%, at which well-defined AgNWs/PEO composite electrodes aligned along the printing direction can be prepared by cone-jet mode of EHD jet printing. We fabricate bottom contact organic thin film transistors (OTFTs) with TIPS-pentacene/PS blend as a semiconducting layer to take advantage of printed AgNWs/PEO electrodes. The resulting devices exhibit stable transfer characteristics for 12 h even in ambient air with average field-effect mobility (μFET), threshold voltage (Vth) and on/off current ratio (Ion/Ioff) of 0.51 cm2/V, ?닋2.0 V, and ~106, respectively. To understand the characteristics of OTFTs based on AgNWs/PEO composite electrodes in detail, we examine crystalline morphology and molecular orientation of TIPS-pentacene/PS blend on various substrates through field emission scanning electron microscopy and two-dimensional grazing incidence X-ray diffraction, respectively.
키워드
AgNWs/PEO composite electrodes, Cone-jet printing, Organic thin film transistors, Printed electronics
KSP 제안 키워드
2 H, Bottom contact, Composite Electrode, Cone-jet mode, Electrical conductivity(EC), Grazing incidence x-ray diffraction, Jet printing, Molecular orientation, ON/OFF current ratio, Organic thin-film transistors, Poly(ethylene oxide)(PEO)