Patterning and integration of polyfluorene polymers on micro-pixellated UV AlInGaN light-emitting diodes

B. Guilhabert, Z. Gong, H. Zhang, C. Belton, A. MacIntosh, E. Gu, M. Campoy-Quiles, P. N. Stavrinou, D. D.C. Bradley, R. A. Pethrick, M. D. Dawson

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Abstract

We report the integration of micro-patterned polyfluorene conjugated polymers onto GaN-based ultraviolet (UV) micro-pixellated light-emitting diode arrays (micro-LEDs). The 64 × 64 element matrix-addressable AlInGaN devices have a pixel size of 20 νm diameter on a 50 νm pitch, emitting at 368 nm. Each array is covered with a 2.5 νm thick photo-curable deep-UV-transparent polymer and a 30 nm thick polyfluorene film. This polymer bi-layer is subsequently patterned into an array of 28 νm diameter discs aligned with the pixels of the micro-LED array. Polymer down-converted visible emission from these pattern-programmable organic/inorganic electroluminescent micro-arrays is achieved. © 2008 IOP Publishing Ltd.
Original languageEnglish (US)
JournalJournal of Physics D: Applied Physics
Volume41
Issue number9
DOIs
StatePublished - May 7 2008
Externally publishedYes

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