TY - JOUR
T1 - Data-Driven Discovery of Full-Visible-Spectrum Phosphor
AU - Li, Shuxing
AU - Xia, Yonghui
AU - Amachraa, Mahdi
AU - Hung, Nguyen Tuan
AU - Wang, Zhenbin
AU - Ong, Shyue Ping
AU - Xie, Rong-Jun
PY - 2019/8/27
Y1 - 2019/8/27
N2 - 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. © 2019 American Chemical Society.
AB - 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. © 2019 American Chemical Society.
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U2 - 10.1021/acs.chemmater.9b02505
DO - 10.1021/acs.chemmater.9b02505
M3 - RGC 21 - Publication in refereed journal
SN - 0897-4756
VL - 31
SP - 6286
EP - 6294
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 16
ER -