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Conjugated polyelectrolyte-assisted vacuum-free transfer-printing of silver nanowire network for top electrode of polymer light-emitting diodes
Affiliation:1. Department of Electrical and Electronic Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan;2. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China;1. School of Electronic and Electrical Engineering, Sungkyunkwan University, Gyeonggi 16419, South Korea;2. Department of Electronic Engineering, Konkuk University, Seoul 143-701, South Korea;1. Department of Physics, College of Science, Tianjin University of Science & Technology, Tianjin 300457, China;2. Group of English, Gangguan Middle School of Tianjin, Tianjin 300301, China;3. Beijing Key Laboratory of Special Functional Materials and Films, School of Materials Science and Engineering, Beihang University, Beijing 100191, China;1. University of Pavia, Department of Physics and CNR-INFM ULTRAS, Via Bassi 6, 27100 Pavia, Italy;2. University of Bari, Department of Chemistry, Via Orabona 4, 70126 Bari, Italy;3. Institute of Chemistry of OrganoMetallic Compounds, ICCOM, Italian National Council of Research, CNR, Via Orabona, 4, 70125, Bari, Italy;4. University of Genova, Department of Chemistry and Industrial Chemistry, Via Dodecaneso 31, 16146 Genova, Italy;1. Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova St., 28, 119991, Moscow, Russian Federation;2. Carl von Ossietzky University of Oldenburg, 26129, Oldenburg, Germany;3. Department of Physics, The LNM Institute for Information Technology, Jamdoli, Jaipur, India
Abstract:We report vacuum-free transfer-printing of silver nanowire (AgNW) network film as a top electrode of polymer light-emitting diodes (PLEDs) using conjugated polyelectrolyte (CPE) interfacial layer. AgNW network is delivered from a donor substrate to the desired area of the devices through an elastomeric polydimethylsiloxane (PDMS) mold stamp. The application of CPE layer with an appropriate thickness on the surface of AgNW and light-emitting polymer (LEP) films provides not only good adhesion between the organic and metal layers but also lowering of the work-function of AgNW electrode for better electron injection at LEP/AgNW interface. PLEDs with laminated AgNW top electrode at the optimized condition show the maximum device efficiencies of 3.81 cd A?1 and 2.99 lm W?1 at 4 V, which are comparable to those of PLEDs with Al cathode.
Keywords:Silver nanowires  Conjugated polyelectrolyte  Polydimethylsiloxane  Transfer printing  Polymer light-emitting diodes
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