Near-Infrared Polymer Light-Emitting Diodes Based on Low-Energy Gap Oligomers Copolymerized into a High-Gap Polymer Host
Artikel i vetenskaplig tidskrift, 2013

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.

infrared

donor-acceptor

PLEDs

emitters

fluorene

Författare

Timothy Steckler

Chalmers, Kemi- och bioteknik, Polymerteknologi

O. Fenwick

University College London (UCL)

Universite de Strasbourg

T. Lockwood

University College London (UCL)

Mats Andersson

Chalmers, Kemi- och bioteknik, Polymerteknologi

F. Cacialli

University College London (UCL)

Macromolecular Rapid Communications

1022-1336 (ISSN) 1521-3927 (eISSN)

Vol. 34 12 990-996

Ämneskategorier

Polymerteknologi

DOI

10.1002/marc.201300240