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Narrow-Band Emitting Phosphor Na 2 Cs 2 Sr(B 9 O 15 ) 2 :Eu 2+ Discovered from Local Structure Similarity with Sulfate Phosphor.

Shota TakemuraYukinori KoyamaTakayuki NakanishiShiro FunahashiNaoto HirosakiHidekazu IkenoTakashi Takeda
Published in: The journal of physical chemistry letters (2022)
Narrow-band emitting phosphors are required to improve the performance of phosphor-converted light-emitting diodes. Here, we found a new narrow-band emitting phosphor Na 2 Cs 2 Sr(B 9 O 15 ) 2 :Eu 2+ using the local structure similarity with a known narrow-band emitting phosphor. In a 2D scatter plot of the structural similarity between the local structures, the Sr site in Na 2 Cs 2 Sr(B 9 O 15 ) 2 was located near the Ba site of the known narrow-band emitting sulfate phosphor BaSO 4 :Eu 2+ with a distorted local structure. We synthesized Na 2 Cs 2 Sr(B 9 O 15 ) 2 :Eu 2+ and characterized the luminescence properties by microspectroscopy. Na 2 Cs 2 Sr(B 9 O 15 ) 2 :Eu 2+ showed a violet luminescence peaked at 417 nm, and the full-width at half-maximum was as narrow as 26 nm (1497 cm -1 ).
Keyphrases
  • energy transfer
  • light emitting
  • quantum dots
  • high resolution