Polymer-Assisted Self-Assembly of Multicolor Carbon Dots as Solid-State Phosphors for Fabrication of Warm, High-Quality, and Temperature-Responsive White-Light-Emitting Devices

We report the design and implementation of solid white-light-emitting phosphors, which combine blue and orange emissive carbon dots assisted by polystyrene through a self-assembly technique

Chan Wang; Tantan Hu; Yueyue Chen; Yalan Xu; Qijun Song

2019

Scholarcy highlights

  • White-light-emitting devices are considered to be a promising illumination source; especially, the WLEDs based on carbon dots with white fluorescence have attracted extensive research interest
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  • We report the design and implementation of solid white-light-emitting phosphors, which combine blue and orange emissive CDs assisted by polystyrene through a self-assembly technique. Based on these phosphors, the obtained WLEDs display a warm white light with International Commission on Illumination coordinates of, a high color rendering index of 93.2, a low correlated color temperature of 4075 K, and a luminous efficiency of up to 14.8 lm·W–1. These WLEDs exhibit temperature-dependent emission performance, whose light-emission spectrum can be adjusted in situ from white to blue in the range of 20–80 °C
  • The temperature-driven tunable LEDs as a thermochromism device could broaden the application of CDs-based lighting systems in special displays
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