Ligand-assisted reduction and reprecipitation synthesis of highly luminescent metal nanoclusters

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

3 Scopus Citations
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Author(s)

  • Yue Wang
  • Yu-e Shi
  • Tianzi Li
  • Henggang Wang
  • Shan Peng
  • Zhenguang Wang

Detail(s)

Original languageEnglish
Pages (from-to)834-839
Journal / PublicationNanoscale Advances
Volume1
Issue number2
Online published19 Nov 2018
Publication statusPublished - 1 Feb 2019

Link(s)

Abstract

Solid-state luminescent materials play a key role in fabricating light-emitting diodes (LEDs). Herein, highly luminescent metal nanoclusters (NCs) are synthesized using a ligand-assisted reduction and reprecipitation process. Glutathione (GSH) dissolved in a good solvent (water) is injected into a poor solvent (ethanol in which Cu2+ is dissolved), where the fast reduction of Cu2+ by GSH and the supersaturation-induced aggregation triggered by the solubility change of GSH upon solvent mixing occur. Nanoparticles with diameters of around 50-80 nm embedded with small-sized Cu NCs (around 2 nm) can be obtained and processed into powders simply by drying the solvent. The powders show bright-orange emission with a photoluminescence quantum yield as high as 48%. Nearly monoexponential behavior was observed in the photoluminescence decay profiles of the Cu NCs, which can be attributed to the abundance of metal defect-related states formed with the assistance of coordination between Cu and ethanol. Moreover, white LEDs were fabricated using blue-emissive commercial phosphors and orange-emissive Cu NCs as color converters integrated with UV LED chips.

Research Area(s)

  • AGGREGATION-INDUCED EMISSION, BLUE, RED

Citation Format(s)

Ligand-assisted reduction and reprecipitation synthesis of highly luminescent metal nanoclusters. / Wang, Yue; Shi, Yu-e; Li, Tianzi; Wang, Henggang; Li, Yanxiu; Xiong, Yuan; Peng, Shan; Wang, Zhenguang.

In: Nanoscale Advances, Vol. 1, No. 2, 01.02.2019, p. 834-839.

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

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