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Multi-Layer Transfer and Lamination (MTL) Process Using High Pressure Air-jet for Highly Efficient and Solution-Processed Polymer Light Emitting Diodes

Abstract

This research reports fabrication of highly efficient polymer light-emitting diodes (PLEDs) by thermally activated multi-layer transfer and lamination (MTL) process. Multi-layers comprised of light-emitting polymer, electron transport, electron injection and metal cathode are sequentially coated over the hydrophobic self-assembled monolayers (SAMs) glass substrate having a low surface energy as a first stage of entire fabrication process. A very rapid delamination of PLEDs multi-layers from the SAMs coated glass is achieved with a high-pressure air-jet. The developed air-jetting system ensures excellent multi-film quality as well as rules out the emergence of commonly generated buckling and crack issues. In addition, the thermal adhesiveness of the PA(polyamide) on the PET(polyethylene terephthalate) is activated by heating PA above its glass transition temperature that guarantees the protection barrier from the water/oxygen in the environment. Finally, the multi-layers(light-emitting polymer/electron transport layer/electron injection layer/cathode) delaminated film associated with the PA/PET is successfully laminated onto the target glass(hole transport/transparent anode) for the realization of PLEDs by employing mild pressure with the help of soft roller. The maximum brightness of the fabricated device by a thermally activated lamination process is achieved around 13120cd/m2 at 8.4V whereas maximum current efficiency and the power efficiency revealed is 5.2cd/A and 4.0lm/W respectively.

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Publication details

The article was received on 16 Mar 2017, accepted on 07 Jun 2017 and first published on 09 Jun 2017


Article type: Paper
DOI: 10.1039/C7NR01859B
Citation: Nanoscale, 2017, Accepted Manuscript
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    Multi-Layer Transfer and Lamination (MTL) Process Using High Pressure Air-jet for Highly Efficient and Solution-Processed Polymer Light Emitting Diodes

    S. A. U. HASAN and H. YOUN, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR01859B

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