S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
Highly luminescent organic nanorods from air oxidation of para-substituted anilines for freestanding deep-red color filters
- Park, Yoonsang; Park, Cheolwoo; Kim, Joo Sung; Ahn, Tae Kyu; Lim, Ho Sun; Lee, Tae-Woo; Kwon, Woosung
- Issue Date
- Advanced Optical Materials, Vol.6 No.22, p. 1800577
- 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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