Surface-Modified Carbon Dots with Improved Photoluminescence Quantum Yield for Color Conversion in White-Light-Emitting Diodes

Kohei Sato, Rika Katakami, Yoshiki Iso, Tetsuhiko Isobe

Research output: Contribution to journalArticlepeer-review

Abstract

Surface modification of p-phenylenediamine-derived carbon dots using 4-morpholinoaniline with an electron-donating and rigid structure followed by purification using silica gel column chromatography increased the photoluminescence quantum yield from 28.3 to 41.8% in chloroform. The improved photoluminescence quantum yield was observed for the surface modification by postaddition of the surface modifier after the formation of the π-conjugated structure of the carbon dot core but was not observed for the carbon dots prepared from a mixture of p-phenylenediamine and 4-morpholinoaniline. The finding of this work gives us an idea to design carbon dots with high photoluminescence quantum yield for application of color conversion in white-light-emitting diodes.

Original languageEnglish
Pages (from-to)7664-7669
Number of pages6
JournalACS Applied Nano Materials
Volume5
Issue number6
DOIs
Publication statusPublished - 2022 Jun 24

Keywords

  • carbon dots
  • morpholine
  • p-phenylenediamine
  • photoluminescence
  • quantum yield
  • surface modification

ASJC Scopus subject areas

  • Materials Science(all)

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