Photolithographic patterning of PEDOT:PSS with a silver interlayer and its application in organic light emitting diodes |
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| Affiliation: | 1. R&D Center for Science and Engineering, JEC Group of Colleges, Jaipur Engineering College Campus, Kukas, Jaipur 303101, Rajasthan, India;2. Department of Physics, JNV University, Jodhpur, India;3. Defence Laboratory, Jodhpur 342011, India;4. Department of Chemistry, Indian Institute of Technology, Indore 452017, MP, India;1. Plasma Coating Research Group, Korea Institute of Materials Science (KIMS), 797, Changwondaero, Changwon, Gyeongnam 641-831, Republic of Korea;2. Advanced Characterization & Analysis Research Group, Korea Institute of Materials Science (KIMS), 797, Changwondaero, Changwon, Gyeongnam 641-831, Republic of Korea;3. Department of Chemistry, Pukyong National University, 45, Yongso-ro, Nam-Gu, Busan 608-737, Republic of Korea;4. Department of Flexible and Printable Electronics, Chonbuk National University, 567, Baekje-Daero, Deokjin-Gu, Jeonju 561-756, Republic of Korea;1. Electrical and Computer Engineering Department, University of Denver, 2390 S York St, Denver, CO 80208, USA;2. Department of Electrical, Computer, and Energy Engineering, University of Colorado at Boulder, 425 UCB, Boulder, CO 80309, USA;3. Department of Physics and Astronomy, University of Denver, 2112 E Wesley Ave, Denver, CO 80208, USA;4. College of Technology, Purdue University, 5500 State Road 38E, West Lafayette, IN 47907, USA;5. National Renewable Energy Laboratory, 1617 Cole Blvd, Golden, CO 80401, USA;6. Department of Physics, University of Colorado at Boulder, 390 UCB, Boulder, CO 80309, USA;1. Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;2. Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan, ROC |
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| Abstract: | A patterning scheme for poly(3,4-ethylenedioxythio-phene):poly(styrenesulfonate) (PEDOT:PSS) is reported. With a silver interlayer, the conductive PEDOT:PSS film can be patterned down to micrometer scales by traditional photolithography, and this patterning scheme can be applied on large-area flexible substrates. Through systematical investigations, the patterning processes have no obvious influence on both the bulk and surface properties of PEDOT:PSS films. Efficient organic light emitting diodes (OLEDs) are realized based on this patterned PEDOT:PSS anode, and they show comparable performance to those devices with an indium tin oxide (ITO) anode. High-resolution OLED pixel arrays are also demonstrated. Our interlayer approach here has an advantage of patterning PEDOT:PSS with high resolution and large scale, and it is also compatible with traditional photolithographic processes which substantially save the capital cost. Results indicate that the photographically patterned conductive PEDOT:PSS film becomes a promising candidate for eletrical eletrode material in organic electronic applications. |
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| Keywords: | PEDOT:PSS Photolithography Silver interlayer Organic light emitting diodes |
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