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Updated: Aug 26, 2026

A Step Beyond BRET: Fluorescence by Unbound Excitation from Luminescence (FUEL)
Published on: May 23, 2014
Narrow-spectrum and strong-absorptive fluorescent dyes: molecular design strategy and electroluminescence
Wenle Tan1, Xinyu Wang1, Donghao Wen1
1Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China. yuyue924@scut.edu.cn.
Abstract:
Narrow-spectrum, strong-absorptive fluorescent dyes are effectively meeting the requirements of organic light-emitting diodes (OLEDs) for colour purity and exciton energy utilisation, showing considerable potential for future display applications. As typified by cyanine dyes, the absorption and emission spectral behaviors are strongly correlated with their intrinsic electronic structural features: homogeneous bond lengths and alternating atomic charges. Further studies reveal that these electronic structural features arise from the resonance balance of two ground-state resonance forms, and this balance can be modulated by donor-acceptor substituents. On this basis, this review comprehensively summarizes the molecular design strategies of fluorescent dyes for OLEDs, followed by a systematic overview of their inherent advantages, remaining challenges, and future application prospects in electroluminescent devices.
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