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  4. Sequential Printing by Laser-Induced Forward Transfer To Fabricate a Polymer Light-Emitting Diode Pixel
 
research article

Sequential Printing by Laser-Induced Forward Transfer To Fabricate a Polymer Light-Emitting Diode Pixel

Shaw-Stewart, James R. H.
•
Lippert, Thomas K.
•
Nagel, Matthias
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2012
ACS Applied Materials & Interfaces

Patterned deposition of polymer light-emitting diode (PLED) pixels is a challenge for electronic display applications. PLEDs have additional problems requiring solvent orthogonality of different materials in adjacent layers. We present the fabrication of a PLED pixel by the sequential deposition of two different layers with laser-induced forward transfer (LIFT), a "dry" deposition technique. This novel use of LIFT has been compared to "normal" LIFT, where all the layers are transferred in a single step, and a conventional PLED fabrication process. For the sequential LIFT, a 50-nm film of an alcohol soluble polyfluorene (PFN) is transferred onto a receiver with a transparent anode, before an aluminum cathode is transferred on top Both steps use a triazene polymer dynamic release layer and are performed in a medium vacuum (1 mbar) across a 15 mu m gap. The rough morphologies of the single layer PFN pixels and the PLED device characteristics have been investigated and compared to both bilayer Al/PFN pixels fabricated by normal LIFT and conventionally fabricated devices. The functionality of the sequential LIFT pixels (0.003 cd/A, up to 200 mA/cm(2), at 30-40 V) demonstrates the suitability of LIFT for sequential patterned printing of different thin-film layers.

  • Details
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Type
research article
DOI
10.1021/am300598h
Web of Science ID

WOS:000306722400028

Author(s)
Shaw-Stewart, James R. H.
Lippert, Thomas K.
Nagel, Matthias
Nueesch, Frank A.
Wokaun, Alexander
Date Issued

2012

Published in
ACS Applied Materials & Interfaces
Volume

4

Start page

3535

End page

3541

Subjects

sequential laser deposition

•

Lift

•

triazene polymer

•

PLED pixels

•

thin-films

•

patterned deposition

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laser direct-write

•

OLEDs

•

Dynamic Release Layer

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Sacrificial Layer

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Excimer-Laser

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Ablation

•

Films

•

Device

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

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Available on Infoscience
August 24, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/85082
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