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Title: Tunable Optical Properties and Increased Thermal Quenching in the Blue-Emitting Phosphor Series: Ba 2 (Y 1–x Lu x ) 5 B 5 O 17 :Ce 3+ ( x = 0–1)

Abstract

The preparation of cerium-substituted barium lutetium borate, Ba2Lu5B5O17:Ce3+, is achieved using high temperature solid state synthesis. This compound crystallizes in the Ba2Y5B5O17-type structure and shows an efficient blue emission (λmax = 447 nm) when excited by UV-light (λex = 340 nm) with a photoluminescent quantum yield near 90%, a fast luminescence decay time (<40 ns), and a thermal quenching temperature of 452 K. Further, preparing a solid solution following Ba2(Y1–xLux)5B5O17:Ce3+ (x = 0, 0.25, 0.50, 0.75, 1) confirms that all compounds are isostructural and follow Vegard’s law. Substituting Y3+ for Lu3+ yields a nearly constant emission spectrum that blue-shifts by only 9 nm and has a consistent luminescence lifetime across the range prepared. The photoluminescent quantum yield (PLQY) and thermal quenching (T50) of the solid solution, however, are dramatically impacted by the composition, with the PLQY decreasing to ≈70% and the T50 dropping 49 K going from x = 1 to x = 0. These significant changes in the optical properties likely stem from enhanced structural rigidity as the larger, more polarizable Y3+ is substituted for the smaller, harder Lu3+ cation. These results highlight the importance of optimizing chemical bonding to improve a phosphor’s optical properties.

Authors:
ORCiD logo [1];  [1];  [1]; ORCiD logo [1]
  1. Department of Chemistry, University of Houston, Houston, Texas 77204, United States
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
UNIVERSITYOTHER
OSTI Identifier:
1372254
Resource Type:
Journal Article
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 29; Journal Issue: 12; Journal ID: ISSN 0897-4756
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE

Citation Formats

Hermus, Martin, Phan, Phu-Cuong, Duke, Anna C., and Brgoch, Jakoah. Tunable Optical Properties and Increased Thermal Quenching in the Blue-Emitting Phosphor Series: Ba 2 (Y 1–x Lu x ) 5 B 5 O 17 :Ce 3+ ( x = 0–1). United States: N. p., 2017. Web. doi:10.1021/acs.chemmater.7b01416.
Hermus, Martin, Phan, Phu-Cuong, Duke, Anna C., & Brgoch, Jakoah. Tunable Optical Properties and Increased Thermal Quenching in the Blue-Emitting Phosphor Series: Ba 2 (Y 1–x Lu x ) 5 B 5 O 17 :Ce 3+ ( x = 0–1). United States. doi:10.1021/acs.chemmater.7b01416.
Hermus, Martin, Phan, Phu-Cuong, Duke, Anna C., and Brgoch, Jakoah. Wed . "Tunable Optical Properties and Increased Thermal Quenching in the Blue-Emitting Phosphor Series: Ba 2 (Y 1–x Lu x ) 5 B 5 O 17 :Ce 3+ ( x = 0–1)". United States. doi:10.1021/acs.chemmater.7b01416.
@article{osti_1372254,
title = {Tunable Optical Properties and Increased Thermal Quenching in the Blue-Emitting Phosphor Series: Ba 2 (Y 1–x Lu x ) 5 B 5 O 17 :Ce 3+ ( x = 0–1)},
author = {Hermus, Martin and Phan, Phu-Cuong and Duke, Anna C. and Brgoch, Jakoah},
abstractNote = {The preparation of cerium-substituted barium lutetium borate, Ba2Lu5B5O17:Ce3+, is achieved using high temperature solid state synthesis. This compound crystallizes in the Ba2Y5B5O17-type structure and shows an efficient blue emission (λmax = 447 nm) when excited by UV-light (λex = 340 nm) with a photoluminescent quantum yield near 90%, a fast luminescence decay time (<40 ns), and a thermal quenching temperature of 452 K. Further, preparing a solid solution following Ba2(Y1–xLux)5B5O17:Ce3+ (x = 0, 0.25, 0.50, 0.75, 1) confirms that all compounds are isostructural and follow Vegard’s law. Substituting Y3+ for Lu3+ yields a nearly constant emission spectrum that blue-shifts by only 9 nm and has a consistent luminescence lifetime across the range prepared. The photoluminescent quantum yield (PLQY) and thermal quenching (T50) of the solid solution, however, are dramatically impacted by the composition, with the PLQY decreasing to ≈70% and the T50 dropping 49 K going from x = 1 to x = 0. These significant changes in the optical properties likely stem from enhanced structural rigidity as the larger, more polarizable Y3+ is substituted for the smaller, harder Lu3+ cation. These results highlight the importance of optimizing chemical bonding to improve a phosphor’s optical properties.},
doi = {10.1021/acs.chemmater.7b01416},
journal = {Chemistry of Materials},
issn = {0897-4756},
number = 12,
volume = 29,
place = {United States},
year = {2017},
month = {6}
}