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Title: Electronic structure descriptor for the discovery of narrow-band red-emitting phosphors

Journal Article · · Chemistry of Materials
 [1];  [1];  [2];  [1]
  1. Univ. of California San Diego, La Jolla, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Narrow-band red-emitting phosphors are a critical component of phosphor-converted light-emitting diodes for highly efficient illumination-grade lighting. In this work, we report the discovery of a quantitative descriptor for narrow-band Eu2+-activated emission identified through a comparison of the electronic structures of known narrow-band and broad-band phosphors. We find that a narrow emission bandwidth is characterized by a large splitting of more than 0.1 eV between the two highest Eu2+ 4f7 bands. By incorporating this descriptor in a high-throughput first-principles screening of 2259 nitride compounds, we identify five promising new nitride hosts for Eu2+-activated red-emitting phosphors that are predicted to exhibit good chemical stability, thermal quenching resistance, and quantum efficiency, as well as narrow-band emission. Lastly, our findings provide important insights into the emission characteristics of rare-earth activators in phosphor hosts and a general strategy to the discovery of phosphors with a desired emission peak and bandwidth.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1259764
Report Number(s):
LLNL-JRNL-692398
Journal Information:
Chemistry of Materials, Vol. 28, Issue 11; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 68 works
Citation information provided by
Web of Science

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Cited By (6)

Computational Studies of Electrode Materials in Sodium-Ion Batteries journal March 2018
Color Conversion Materials for High‐Brightness Laser‐Driven Solid‐State Lighting journal November 2018
Thermal stabilization and energy transfer in narrow-band red-emitting Sr[(Mg 2 Al 2 ) 1−y (Li 2 Si 2 ) y N 4 ]:Eu 2+ phosphors journal January 2018
Dependence of the photoluminescence properties of Eu 2+ doped M–Si–N (M = alkali, alkaline earth or rare earth metal) nitridosilicates on their structure and composition journal January 2018
Ab initio exploration and prediction of AE-containing nitrido(litho/magneso)tetrelates (AE = Ca, Sr; Tt = Si, Ge) with [Si 2 N 6 ] 10− or [Ge 2 N 6 ] 10− units journal January 2019
Critical Review—Narrow-Band Emission of Nitride Phosphors for Light-Emitting Diodes: Perspectives and Opportunities journal July 2017

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