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Highly Luminescent Organic Nanorods from Air Oxidation of para‐Substituted Anilines for Freestanding Deep‐Red Color Filters
Advanced Optical Materials ( IF 9 ) Pub Date : 2018-09-05 , DOI: 10.1002/adom.201800577
Yoonsang Park 1 , Cheolwoo Park 2 , Joo Sung Kim 3 , Tae Kyu Ahn 2 , Ho Sun Lim 4 , Tae-Woo Lee 3 , Woosung Kwon 4
Affiliation  

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 π–π 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.

中文翻译:

空气氧化对位取代苯胺产生的高发光有机纳米棒,用于独立式深红色彩色滤光片

苯胺的氧化提供了有用的有机纳米结构,具有各种颗粒形态和特性。因此,在本研究中,新型的发光有机纳米棒(ONs)是通过对取代的苯胺的一步空气氧化而合成的,而没有任何可指导形状的表面活性剂。由于邻位,这些ON呈现出高度结晶的棒状结构苯胺类化合物与吩嗪类结构之间的π-π相互作用的偶联反应。使用光致发光光谱,吸收光谱,与时间相关的单光子计数和与时间相关的密度泛函理论计算,发现ON中的吩嗪类结构在很大程度上导致了它们的明亮,光稳定,深红色发光,并具有绝对的量子效率高达46%。最后,展示了将ON用作深红色发光器件的独立式彩色滤光片的潜在应用,该器件可用于未来显示器的彩色像素。这项研究的发现为制备发光有机纳米材料提供了新的策略,并显示了其在光电应用中的潜力。
更新日期:2018-09-05
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