Data-Driven Discovery of Full-Visible-Spectrum Phosphor

Shuxing Li, Yonghui Xia, Mahdi Amachraa, Nguyen Tuan Hung, Zhenbin Wang, Shyue Ping Ong, Rong Jun Xie

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The development of extra-broadband phosphors is essential for next-generation illumination with better color experience. In this work, we report the discovery of the first-known Eu2+-activated full-visible-spectrum phosphor, Sr2AlSi2O6N:Eu2+, identified by combining data mining of high-throughput density functional theory calculations and experimental characterization. Excited by UV-light-emitting diodes (LEDs), Sr2AlSi2O6N:Eu2+ shows a superbroad emission with a bandwidth of 230 nm, the broadest emission bandwidth ever reported, and has excellent thermal quenching resistance (88% intensity at 150 °C). A prototype white LED utilizing only this full-visible-spectrum phosphor exhibits superior color quality (Ra = 97, R9 = 91), outperforming commercial tricolor phosphor-converted LEDs. These findings not only show great promise of Sr2AlSi2O6N:Eu2+ as a single white emitter but also open up in silico design of full-visible-spectra phosphor in a single-phase material to address the reabsorption energy loss in commercial tricolor phosphor mixture.

Original languageEnglish
Pages (from-to)6286-6294
Number of pages9
JournalChemistry of Materials
Volume31
Issue number16
DOIs
Publication statusPublished - 2019 Aug 27

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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    Li, S., Xia, Y., Amachraa, M., Hung, N. T., Wang, Z., Ong, S. P., & Xie, R. J. (2019). Data-Driven Discovery of Full-Visible-Spectrum Phosphor. Chemistry of Materials, 31(16), 6286-6294. https://doi.org/10.1021/acs.chemmater.9b02505