Room-temperature one-pot synthesis of highly stable SiO2-coated Mn-doped all-inorganic perovskite CsPb0.7Mn0.3Br0.75Cl2.25 quantum dots for bright white light-emitting diodes

Chunxia Wu, Hongxiang Zhang, Shouzhi Wang, Wei Wang, Jun Dai

Research output: Contribution to journalArticle

Abstract

In this paper, we report a simple one-pot strategy to synthesize highly stable SiO 2-coated orange-yellow CsPb 0.7Mn 0.3Br 0.75Cl 2.25 quantum dots with strong orange-yellow photoluminescence. The microstructure characterization indicates that the CsPb 0.7Mn 0.3Br 0.75Cl 2.25 quantum dots were effectively encapsulated by the SiO 2. The SiO 2-coated CsPb 0.7Mn 0.3Br 0.75Cl 2.25 quantum dots show higher humidity stability and thermal stability than the CsPb 0.7Mn 0.3Br 0.75Cl 2.25 quantum dots without SiO 2 coating. The white light-emitting diodes (WLEDs) were obtained by coating orange-yellow CsPb 0.7Mn 0.3Br 0.75Cl 2.25@SiO 2 and blue CsPbBrCl 2@SiO 2 quantum dots on the ultraviolet gallium nitride light-emitting diode chip. The as-prepared white light-emitting diodes show bright white light emission with a color coordinate of (0.3347, 0.2825), color rendering index of 82 and correlated color temperature of 5329 K. The results provide a simple method to fabricate stable orange-yellow luminescent material for white light-emitting diodes.

Original languageEnglish
Article number117236
JournalJournal of Luminescence
Volume223
Early online date24 Mar 2020
DOIs
Publication statusPublished - Jul 2020

Keywords

  • Inorganic perovskite
  • Quantum dots
  • White light-emitting diodes

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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