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    In-Depth Investigation of Inkjet-Printed Silver Electrodes over Large-Area: Ink Recipe, Flow, and Solidification

    Year: 2022

    Journal: Adv. Mater. Interfaces, Volume 9, JUN

    Authors: Zhou, Lu; Chen, Xiaolian; Su, Wenming; Cui, Zheng; Lai, Wen-Yong

    Organizations: Natural Science Foundation of Jiangsu Province [BE2019120, BK20180763]; National Natural Science Foundation of China [21835003, 21674050]; National Key Basic Research Program of China [2014CB648300, 2017YFB0404501]; Natural Science Foundation of Jiangsu Higher Education Institutions [17KJB510039]; Natural Science Foundation of NIIT [101050618YK207]; Industry-University-Research Cooperation Project of Jiangsu Province [BY2020411]; Six Talent Peaks Project of Jiangsu Province [TD-XCL-009]; 333 Project of Jiangsu Province [BRA2017402]; NUPT Scientific Foundation [NY218164, NY217169]; Leading Talent of Technological Innovation of National Ten-Thousands Talents Program of China; Excellent Scientific and Technological Innovative Teams of Jiangsu Higher Education Institutions [TJ217038]; Synergetic Innovation Center for Organic Electronics and Information Displays; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD); NUPT 1311 Project; Program for Jiangsu Specially-Appointed Professor [RK030STP15001]

    Keywords: flexible electronics; ink formulation; inkjet printing; passive matrix organic light emitting diodes; transparent conducting electrodes

    Inkjet-printed flexible transparent conducting electrodes (TCEs) have attracted much recent interest in realizing large-scale and high-volume fabrication required by the industrial production protocol. In this paper, an in-depth investigation and optimization of template-less inkjet printing for the metal meshes based TCEs are presented. The general principle of conductive ink formulation for inkjet printing, the droplet coalescence and crawling on the substrates, and its solidification processes are thoroughly studied. Ideal silver lines with high conductivity of 3.4 mu omega center dot cm can be obtained on various substrates, with fine line-width adjustment by step length of 5 mu m. The uniformity of the width, morphology, and conductivity of printed silver lines over large-area are improved by factors of 3.44, 1.53, and 1.95, respectively. Subsequently, passive matrix organic light emitting diodes based on silver array electrodes are fabricated to successfully light the point, line, and surface. A flexible silver mesh TCE is also printed, with low sheet resistance of 9.56 omega sq(-1) and good flexibility.
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