Data-Driven Discovery of Full-Visible-Spectrum Phosphor
Journal
Chemistry of Materials
Journal Volume
31
Journal Issue
16
Start Page
6286
End Page
6294
ISSN
08974756
15205002
Date Issued
2019
Author(s)
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.
Subjects
Bandwidth
Data Mining
Density Functional Theory
Energy Dissipation
Light Emission
Light Emitting Diodes
Color Quality
Emission Bandwidth
Experimental Characterization
High Throughput
Phosphor-converted Leds
Single-phase Materials
Thermal Quenching
Visible Spectra
Phosphors
SDGs
Publisher
American Chemical Society service@acs.org
Type
journal article