Comparative photoluminescence study of nitrogen‐doped carbon dots co‐doped with boron and sulphur

Although different studies in carbon dots (CDs) have been reported based on heteroatom doping, most of them have focussed on the enhancement of fluorescence properties. Here we report a comparative study of both fluorescence and room‐temperature phosphorescence (RTP) of nitrogen–sulphur‐doped CDs (N...

Full description

Saved in:
Bibliographic Details
Published in:Luminescence (Chichester, England) England), 2022-09, Vol.37 (9), p.1475-1481
Main Authors: Joseph, Julin, Anappara, Aji A.
Format: Article
Language:English
Subjects:
Aluminum sulfate
Boron
Carbon
Carbon dots
Comparative analysis
Comparative studies
Emission
Emissions
Fluorescence
heteroatom doping
intersystem crossing
Irradiation
Nitrogen
nonradiative transition
persistent luminescence
Phosphorescence
Photoluminescence
Photons
Potash
Potassium carbonate
Pyrolysis
room‐temperature phosphorescence
Sulfur
Sulphur
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Although different studies in carbon dots (CDs) have been reported based on heteroatom doping, most of them have focussed on the enhancement of fluorescence properties. Here we report a comparative study of both fluorescence and room‐temperature phosphorescence (RTP) of nitrogen–sulphur‐doped CDs (N–S CDs) and nitrogen–boron‐doped CDs (N–B CDs) with N‐doped CDs (N CDs). The CDs used in the study were synthesized through microwave‐assisted pyrolysis. Among the doped CDs, sulphur‐doped CDs showed a high fluorescence quantum yield. Upon irradiation, the aqueous dispersion of the CDs demonstrated blue fluorescence. Furthermore, by incorporating the CDs in a potash alum matrix, blue fluorescence, as well as green phosphorescence was observed. The phosphorescence lifetime measurements indicated that the N–S CDs exhibited a longer emission lifetime and a red‐shifted emission in contrast with other samples, which might be attributed to the presence of a greater proportion of surface states on the N–S CDs. Synthesis of heteroatom‐doped carbon dots (N CDs, N–S CDs, N–B CDs) and their fluorescence and phosphorescence properties.
ISSN:1522-7235
1522-7243
DOI:10.1002/bio.4320