Highly Stretchable and Conductive Polymer Electrode for Efficient Optoelectronic Devices
발표자
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초록
내용
Over the past decade, stretchable and flexible electronics have grown a large demand for their future applications such as wearable devices and artificial electronic human skin. Stretchable conducting polymer is one of the promising candidates to replace the conventional fragile electrode because of their stretchability, high electrical and mechanical property, and solution processability. Among various conducting polymer, Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is reported as the highest conductivity material including high potential for stretchable material. Based on these outstanding properties, many attempted approaches have been reported to improve conductivity and stretchability of PEDOT:PSS. For example, adding polar organic solvent, such as dimethylsulfoxide (DMSO), N,N-dimethylformamide, and ethylene glycol, is proposed to improve conductivity of PEDOT:PSS and ionic additives is adopted to assist stretchability of PEDOT:PSS. Herein, we propose an optimum combination of PEDOT:PSS, polar organic solvent, and ionic additives, which shows both highly stretchable and highly conductive film property. As testifying materials, we selected DMSO and ethylene glycol for polar solvent and 1-Ethyl-3-methylimidazolium ethyl sulfate (EMIM ES), 1-Butyl-3-methylimidazolium octyl sulfate (EMIM OS), and 1-Ethyl-3-methylimidazolium tricyanomethanide (EMIM TCM) for ionic additives. Lastly, we fabricated indoor organic solar cells with the proposed stretchable conductive polymer electrode and evaluated their optoelectrical performance.