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http://dx.doi.org/10.5012/bkcs.2012.33.2.464

Studies on Printing Inks Containing Poly[2-methoxy-5-(2-ethylhexyl-oxyl)-1,4-phenylenevinylene] as an Emissive Material for the Fabrication of Polymer Light-Emitting Diodes by Inkjet Printing  

Kwon, Jae-Taek (Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University)
Eom, Seung-Hun (Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University)
Moon, Byung-Seuk (Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University)
Shin, Jin-Koog (Korea Printed Electronics Center, Korea Electronics Technology Institute)
Kim, Kyu-Sik (Material & Device Institute, Samsung Advanced Institute of Technology, Samsung Electronics)
Lee, Soo-Hyoung (Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University)
Lee, Youn-Sik (Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University)
Publication Information
Bulletin of the Korean Chemical Society / v.33, no.2, 2012 , pp. 464-468 More about this Journal
Abstract
Three solvent systems, chlorobenzene (ink 1), chlorobenzene/o-dichlorobenzene (ink 2) and chlorobenzene/tetrahydronaphthalene (ink 3), were compared as printable inks for the fabrication of polymer light-emitting diodes (PLEDs) using poly[2-methoxy-5-(2-ethylhexyl-oxyl)-1,4-phenylenevinylene (MEH-PPV) as an emissive material and an inkjet printer (Fujifilm Dimatix DMP-2831). Ink 1 clogged the printer's nozzle and gave non-uniform film. Inks 2 and 3 were used to fabricate PLEDs with ITO/PEDOT:PSS/MEH-PPV/LiF/Al configurations. The best performance (turn-on voltage, 3.5 V; luminance efficiency, 0.17 cd/A; luminance, 1,800 cd/m) was obtained when ink 3 was used to form the emissive layer (thickness, 49 nm), attributable to the better morphology and suitable thickness of the MEH-PPV layer.
Keywords
Inkjet printing; Polymer LED; MEH-PPV; Printing ink;
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