Research Article

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2018, 11(1): 151–162

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https://doi.org/10.1007/s12274-017-1614-3

Simultaneous red–green–blue electroluminescent enhancement directed by surface plasmonic “far-field” of facile gold nanospheres

Xiaoyan Wu1,3, Yiqi Zhuang1, Zhongtao Feng1, Xuehong Zhou1, Yuzhao Yang2, Linlin Liu1 (*), Zengqi Xie1, Xudong Chen2, and Yuguang Ma1 (*)

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1 Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
2 Key Laboratory for Polymer Composite and Functional Material of Ministry of China, Sun Yat-sen University, Guangzhou 510275, China
3 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China

Keywords: gold nanoparticles (Au NPs), “far-field” effect, surface plasma resonance, white organic light emitting diodes
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ABSTRACT Based on the “far-field” effect of surface plasma resonance, simultaneous red–green–blue electroluminescence enhancement by facile synthesized gold nanospheres were realized in this work, which would be difficult and complex to attain using wavelength-selected localized surface plasma resonance. The plasmonic “far-field” effect can simultaneously enhance the whole emission region in the white light range, because the enhancing regions from blue to red emission are largely overlapped. By doping gold nanospheres embedded in a poly(3,4-ethylene dioxythiophene):polystyrene sulfonic acid (PEDOT:PSS) layer, yield enhancement is achieved in more than 95% devices with the best enhancing ratio of 60% and the commission International de L’Eclairage (CIE) coordinate is stable at approximately (0.33, 0.36). The plasmonic “far-field” effect requires an ultra-low working concentration of Au NPs in picomolar magnitude, and shows little negative effect on the electronic process and light scattering, which has big potential in realizing highly efficient white organic light emitting diodes.
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Simultaneous red–green–blue electroluminescent enhancement directed by surface plasmonic “far-field” of facile gold nanospheres. Nano Res. 2018, 11(1): 151–162 https://doi.org/10.1007/s12274-017-1614-3

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