Glycothermally Synthesized Carbon Dots with Narrow-Bandwidth and Color-Tunable Solvatochromic Fluorescence for Wide-Color-Gamut Displays

To prepare narrow-bandwidth emissive carbon dots at lower temperatures, with a shorter heating duration, and without high pressure and any catalysts, we focused on designing an open reaction system using a high-boiling solvent rather than the closed reaction system in an autoclave used in the previous reports, because the dehydration and condensation reactions are expected to be promoted by removing water from the system

Taishu Yoshinaga

2021

Scholarcy highlights

  • Phosphors are used in a wide variety of applications, such as lighting, displays, solar cells, and medical probes that are vital for society
  • Fluorescent carbon nanoparticles, called carbon dots, were discovered in 2004 and have received a great deal of attention as next-generation phosphors.− CDs can be produced from a variety of organic materials and possess robust graphite structures, contributing to their environmental friendliness, high thermal stability, and high photostability
  • To prepare narrow-bandwidth emissive CDs at lower temperatures, with a shorter heating duration, and without high pressure and any catalysts, we focused on designing an open reaction system using a high-boiling solvent rather than the closed reaction system in an autoclave used in the previous reports, because the dehydration and condensation reactions are expected to be promoted by removing water from the system
  • The intermolecular dehydration and condensation reactions among Ph were facilitated in the open system, resulting in the ordered graphite structure and the homogeneous surface functional groups of OH of Ph-CDs
  • Ph-CD powders were dispersed in seven solvents with different polarities because of the hydrophobic π-conjugated system and hydrophilic OH groups
  • Ph-CD polymer composite films showed a similar solvatochromic behavior and narrow-bandwidth emissions. This novel atmospheric glycothermal preparation of narrow-bandwidth emissive CDs can contribute to their mass production and we verified the feasibility of applying them to wide-color-gamut displays and LEDs
  • The intermolecular dehydration and condensation reactions among Ph were facilitated in the open system, resulting in the ordered graphite structure and the homogeneous surface functional groups of OH of Ph-carbon dots. Ph-CD powders were dispersed in seven solvents with different polarities because of the hydrophobic π-conjugated system and hydrophilic OH groups

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