Intense enhancement of yellow luminescent carbon dots coupled with gold nanoparticles toward white LED

A novel gold-carbon dots exhibiting relatively high luminescence have been successfully synthesized by a facile solution cast method

Yijun Zhang; Jiaqi Zhang; Junwen Zhang; Sai Lin; Yunyun Huang; Rongrong Yuan; Xiaojuan Liang; Weidong Xiang

2017

Scholarcy highlights

  • A novel gold-carbon dots exhibiting relatively high luminescence have been successfully synthesized by a facile solution cast method
  • The 1.5–3 fold enhancement was obtained in the vicinity of Au nanoparticles
  • The formation mechanism and chemical structure of the as-prepared GCDs were verified by a series of characterization techniques, such as high-resolution transmission electron microscope, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy
  • The GCDs with optimal fluorescence was acquired by varying volume ratio of colloidal Au NPs to CDs, rendering bright visible light under 460 nm excitation and high quantum yield of 39%
  • The GCDs film at appropriate thickness possesses excellent optical performances with the corresponding optimized color coordinate of, the color rendering index of 78.2, correlated color temperature of 5653 K, and the luminous efficiency approaching to 43.75 lm W−1. These superior results demonstrate that GCDs constitute a versatile and effective route for achieving high-performance white LED
  • These superior results demonstrate that gold-carbon dots constitute a versatile and effective route for achieving high-performance white LED

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