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Highly Luminescent Organic Nanorods from Air Oxidation of para-Substituted Anilines for Freestanding Deep-Red Color Filters

Authors
Park, YoonsangPark, CheolwooKim, Joo SungAhn, Tae KyuLim, Ho SunLee, Tae-WooKwon, Woosung
Issue Date
Nov-2018
Publisher
WILEY-V C H VERLAG GMBH
Keywords
aniline; luminescence; nanorods; phenazine; red emission
Citation
ADVANCED OPTICAL MATERIALS, v.6, no.22
Journal Title
ADVANCED OPTICAL MATERIALS
Volume
6
Number
22
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/4206
DOI
10.1002/adom.201800577
Abstract
Oxidation of aniline provides useful organic nanostructures with a wide variety of particle morphologies and properties. Accordingly, in the present study, novel luminescent organic nanorods (ONs) are synthesized through one-step air oxidation of para-substituted anilines without any shape-guiding surfactants. These ONs present highly crystalline rod-like structures due to the ortho-coupling reaction of aniline and pi-pi interactions between the phenazine-like structures. Using photoluminescence spectroscopy, absorption spectroscopy, time-correlated single photon counting, and time-dependent density functional theory calculation, it is revealed that the phenazine-like structures in the ONs are largely responsible for their bright, photostable, deep-red luminescence with absolute quantum efficiency up to 46%. Finally, the potential application of ONs as a freestanding color filter for deep-red-light-emitting devices that could be used for color pixels of future displays is demonstrated. The findings of this study provide a new strategy for the preparation of luminescent organic nanomaterials, and show their potential for optoelectronic applications.
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