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Title: Resonant inelastic X-ray scattering of tantalum double perovskite structures

Abstract

In this paper, we investigated the electronic structures and defect states of SrLaMgTaO 6 (SLMTO) double perovskite structures by using resonant inelastic x-ray scattering. Recently, Eu 3+ doped SLMTO red phosphors have been vigorously investigated due to their higher red emission efficiency compared to commercial white light emitting diodes (W-LED). However, a comprehensive understanding on the electronic structures and defect states of host SLMTO compounds, which are specifically related to the W-LED and photoluminescence (PL), is far from complete. Here, we found that the PL spectra of SLMTO powder compounds sintered at a higher temperature, 1400 °C, were weaker in the blue emission regions (at around 400 nm) and became enhanced in near infrared (NIR) regions compared to those sintered at 1200 °C. To elucidate the difference of the PL spectra, we performed resonant inelastic x-ray spectroscopy (RIXS) at Ta L-edge. Here, our RIXS result implies that the microscopic origin of different PL spectra is not relevant to the Ta-related defects and oxygen vacancies.

Authors:
 [1];  [2];  [1]; ORCiD logo [3]
  1. Pukyong National Univ., Busan (South Korea)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Pukyong National Univ., Busan (South Korea); Chung-Ang Univ., Seoul (South Korea)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1476899
Grant/Contract Number:  
[AC02-06CH11357]
Resource Type:
Accepted Manuscript
Journal Name:
Current Applied Physics
Additional Journal Information:
[ Journal Volume: 18; Journal Issue: 11]; Journal ID: ISSN 1567-1739
Publisher:
Korean Physical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Resonant inelastic X-ray scattering; SrLaMgTaO6; Double perovskites; Light emitting diodes

Citation Formats

Oh, Ju Hyun, Kim, Jung Ho, Jeong, Jung Hyun, and Chang, Seo Hyoung. Resonant inelastic X-ray scattering of tantalum double perovskite structures. United States: N. p., 2018. Web. doi:10.1016/j.cap.2018.05.014.
Oh, Ju Hyun, Kim, Jung Ho, Jeong, Jung Hyun, & Chang, Seo Hyoung. Resonant inelastic X-ray scattering of tantalum double perovskite structures. United States. doi:10.1016/j.cap.2018.05.014.
Oh, Ju Hyun, Kim, Jung Ho, Jeong, Jung Hyun, and Chang, Seo Hyoung. Tue . "Resonant inelastic X-ray scattering of tantalum double perovskite structures". United States. doi:10.1016/j.cap.2018.05.014. https://www.osti.gov/servlets/purl/1476899.
@article{osti_1476899,
title = {Resonant inelastic X-ray scattering of tantalum double perovskite structures},
author = {Oh, Ju Hyun and Kim, Jung Ho and Jeong, Jung Hyun and Chang, Seo Hyoung},
abstractNote = {In this paper, we investigated the electronic structures and defect states of SrLaMgTaO6 (SLMTO) double perovskite structures by using resonant inelastic x-ray scattering. Recently, Eu3+ doped SLMTO red phosphors have been vigorously investigated due to their higher red emission efficiency compared to commercial white light emitting diodes (W-LED). However, a comprehensive understanding on the electronic structures and defect states of host SLMTO compounds, which are specifically related to the W-LED and photoluminescence (PL), is far from complete. Here, we found that the PL spectra of SLMTO powder compounds sintered at a higher temperature, 1400 °C, were weaker in the blue emission regions (at around 400 nm) and became enhanced in near infrared (NIR) regions compared to those sintered at 1200 °C. To elucidate the difference of the PL spectra, we performed resonant inelastic x-ray spectroscopy (RIXS) at Ta L-edge. Here, our RIXS result implies that the microscopic origin of different PL spectra is not relevant to the Ta-related defects and oxygen vacancies.},
doi = {10.1016/j.cap.2018.05.014},
journal = {Current Applied Physics},
number = [11],
volume = [18],
place = {United States},
year = {2018},
month = {5}
}

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