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Near-Infrared Polymer Light-Emitting Diodes Based on Low-Energy Gap Oligomers Copolymerized into a High-Gap Polymer Host

Timothy Steckler (Institutionen för kemi- och bioteknik, Polymerteknologi) ; O. Fenwick ; T. Lockwood ; Mats R. Andersson (Institutionen för kemi- och bioteknik, Polymerteknologi) ; F. Cacialli
Macromolecular Rapid Communications (1022-1336). Vol. 34 (2013), 12, p. 990-996.
[Artikel, refereegranskad vetenskaplig]

Near-infrared (NIR) polymer light-emitting diodes (PLEDs) based on a fluorene-dioctyloxyphenylene wide-gap host material copolymerized with a low-gap emitter are presented. Various loadings (1, 2.5, 10, 20 mol%) of the low-gap emitter are studied, with higher loadings leading to decreased efficiencies likely due to aggregation effects. While the 10 mol% loading resulted in almost pure NIR emission (>99.6%), the 1 mol% loading yielded optimum device performance, which is among the best reported to date for a unblended single-layer pure polymer emitter, with an external quantum efficiencies of 0.04% emitting at 909 nm. The high spectral purity of the PLEDs combined with their performance support the methodology of copolymerization as an effective strategy for developing NIR PLEDs.

Nyckelord: donor-acceptor, emitters, infrared, fluorene, PLEDs

Denna post skapades 2013-07-30.
CPL Pubid: 180341


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Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)



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