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Salt-embedded carbon nanodots as a UV and thermal stable fluorophore for light-emitting diodes

Authors
Journal
Journal of Luminescence
0022-2313
Publisher
Elsevier
Volume
154
Identifiers
DOI: 10.1016/j.jlumin.2014.04.002
Keywords
  • Photoluminescent Nanoparticles
  • Carbon Nanodots
  • Uv Stability
  • Thermal Stability
  • Color-Converting Phosphors

Abstract

Abstract UV and thermal stable, photoluminescent carbon dots (CDs) prepared by embedding CDs in ionic salt crystals such as NaCl, KCl, KBr are demonstrated. The salt crystal embedding matrix does not interfere with CDs strong emission, and provides effective protection to CDs from the environment. The degradation of 20% of the initial luminescence intensity of salt-encapsulated CDs (S-CDs) is 15 times slower under UV and 6 times slower under heat compared to that of CDs in silica matrix. We also demonstrate that the S-CDs can be applied as a color-converting phosphor for typical GaN UV light emitting diodes (LEDs) with significant improvements in stability as well as processability.

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