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Highly luminescent organic nanorods from air oxidation of para-substituted anilines for freestanding deep-red color filters

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Authors
Park, Yoonsang; Park, Cheolwoo; Kim, Joo Sung; Ahn, Tae Kyu; Lim, Ho Sun; Lee, Tae-Woo; Kwon, Woosung
Issue Date
2018-11
Citation
Advanced Optical Materials, Vol.6 No.22, p. 1800577
Keywords
anilineluminescencenanorodsphenazinered emission
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.
ISSN
2195-1071
URI
https://hdl.handle.net/10371/164478
DOI
https://doi.org/10.1002/adom.201800577
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
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