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Silver Transparent Electrodes Using Micro-Patterns Prepared from Polystyrene Colloidal Arrays

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With the significant growth of the industry for electronic and optoelectronic devices such as touch screens, thin film solar cells, and light emitting device displays, the demands for transparent conductive electrodes have been increasing. However, conventional transparent electrodes are fabricated using expensive and complicated techniques, such as photolithography, sputtering deposition, and thermal evaporation. In this work, we propose a facile and cost-effective method to fabricate a new type of transparent electrode, using silver nanocrystals and micro-patterned structures. The micro-patterns were fabricated by solution processing with silica sol combined with soft lithography, using polydimethylsiloxane replica molds prepared from polystyrene colloidal arrays. Silver transparent electrodes were subsequently fabricated by deposition of silver nanocrystals onto the micropatterns, followed by sintering and selective etching. The optical transparency and sheet resistance of the electrodes were dependent on the size of micro-patterns. The optimal electrode produced using a 2-μm pattern, showed outstanding optical and electrical properties with a transmittance of ~80% throughout the visible range and a sheet resistance of 60 Ω/sq. This novel silver transparent electrode can be an excellent candidate for electronic applications.
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Keywords: Polystyrene; Silver Nanocrystals; Solution Process; Transparent Electrode

Document Type: Research Article

Affiliations: 1: Department of Chemical and Biomolecular Engineering (BK21 + Graduate Program), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea 2: Display Materials and Components Research Center, Korea Electronics Technology Institute (KETI), #25 Saenari-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 13509, Republic of Korea

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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