Light sintering of ultra-smooth and robust silver nanowire networks embedded in poly(vinyl-butyral) for flexible OLED

A conductive, uniform, and ultra-smooth flexible transparent composite film is produced by embedding silver nanowires (AgNWs) into poly(vinyl-butyral) (PVB) without pressure or high-temperature annealing. The adhesion of AgNWs was greatly improved by embedding them in PVB, and surface roughness and...

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Bibliographic Details
Published in:Scientific reports 2018-09, Vol.8 (1), p.14170-9, Article 14170
Main Authors: Lee, Dong Jun, Oh, Youngsu, Hong, Jae-Min, Park, Young Wook, Ju, Byeong-Kwon
Format: Article
Language:English
Subjects:
639/166/987
639/624/399/1016
639/925/357/1016
Embedding
Flexible OLED
High temperature
Humanities and Social Sciences
Intense Pulsed Light (IPL)
Mirrors
multidisciplinary
Nanotechnology
Organic Light-emitting Diodes (OLEDs)
Polymers
Pressure
Science
Science (multidisciplinary)
Sheet Resistance
Silver
Silver Nanowires
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Summary:A conductive, uniform, and ultra-smooth flexible transparent composite film is produced by embedding silver nanowires (AgNWs) into poly(vinyl-butyral) (PVB) without pressure or high-temperature annealing. The adhesion of AgNWs was greatly improved by embedding them in PVB, and surface roughness and sheet resistance (R s ) improvements were achieved through the use of the intense pulsed light (IPL) method, which welds the interconnections among AgNWs in a short time without heat or pressure treatment. The sheet resistance of PVB/AgNWs with the IPL(PAI) composite film reaches 12.6 ohm/sq with a transmittance of 85.7% (at 550 nm); no clear changes in the sheet resistance are observed after a substrate bending and tape test, suggesting excellent flexibility. In the case of PAI, the change in sheet resistance was only 2.6% after a 2,000-bend test, and the resulting bending radius was less than 1 mm. When IPL was exposed to PVB/AgNWs, the figure of merit was 2.36 times higher than that without exposure. Finally, flexible OLEDs using PAI exhibited comparable or higher electroluminescent characteristics than other devices with well-known flexible electrodes—including indium-zinc-oxide on polymer plastic—which is a promising discovery for flexible optoelectronic applications.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-32590-0