Highly Luminescent Solid‐State Carbon Dots Embedded in a Boric Acid Matrix

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
View graph of relations

Author(s)

  • Henggang Wang
  • Zhen Zhang
  • Qinqin Yan
  • Chenyang Zhang
  • Yifei Xing
  • Feng Zhang

Detail(s)

Original languageEnglish
Pages (from-to)13969-13973
Journal / PublicationChemistrySelect
Volume5
Issue number44
Online published24 Nov 2020
Publication statusPublished - 30 Nov 2020

Abstract

Aggregation‐caused quenching of carbon dots (CDs) has limited their application for optoelectronic devices. In this work, we reported a highly luminescent solid‐state CDs through a freeze‐drying assisted hydrothermal method, using citric acid, urea and boric acid as raw materials. The hydrothermal process triggers the formation of the carbonaceous structures, and freeze‐drying treatment results in the dehydration and crossing linking reactions between the carbonaceous structures and boric acid, forming CDs embedded in the matrix of boric acid. Steady‐state fluorescence spectra and time‐resolved PL decay curves, together with the XPS data suggest the significant promotion of photoluminescence quantum yield after processing CDs from solution to powder state is attributed to surface passivation and activating of new emissive states caused by the attraction of boron. The CDs shows a high photoluminescence quantum yield of 80.1 %, with an excellent thermal stability, which are further used as phosphor for fabricating LED. A white LED is obtained after combining blue emissive CDs with orange emissive Cu nanocluster with UV‐LED chips, achieving a high color rendering index of 89, and a Commission Internationale de L'Eclairage chromaticity coordinates of (0.33, 0.32).

Research Area(s)

  • Aggregation-caused quenching, Carbon dots, LED, solid state emission

Citation Format(s)

Highly Luminescent Solid‐State Carbon Dots Embedded in a Boric Acid Matrix. / Wang, Henggang; Zhang, Zhen; Yan, Qinqin; Zhang, Chenyang; Xing, Yifei; Xiong, Yuan; Zhang, Feng; Wang, Zhenguang.

In: ChemistrySelect, Vol. 5, No. 44, 30.11.2020, p. 13969-13973.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review