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Title: Doping Y 2O 3 with Mn 4+ for energy-efficient lighting

Abstract

Developing energy-efficient LEDs that emit warm white light requires new red phosphors with appropriate emission wavelengths and band widths. Mn 4+-activated Y 2O 3 is a potential red LED phosphor with narrow emission and improved emission wavelength compared to previously known Mn 4+-activated oxide phosphors. Here in this work, the dopability and the oxidation state of Mn in Y 2O 3 are investigated based on the formation energies of native defects, Mn dopants, and divalent co-dopants (i.e., Ca, Sr, Cd, and Zn) calculated using hybrid density functional theory. We found that Mn 4+ is difficult to form in Y 2O 3 without co-doping. Stabilizing Mn 4+ on Y 3+ sites (forming Mn + Y donors) requires the co-doping of compensating acceptors (Ca or Sr) in oxygen-rich growth environments.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Beihang Univ., Beijing (United States). Dept. of Physics, Key Laboratory of Micro-Nano Measurement-Manipulation and Physics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1435233
Alternate Identifier(s):
OSTI ID: 1434162
Grant/Contract Number:
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Materials Chemistry C
Additional Journal Information:
Journal Volume: 6; Journal Issue: 15; Journal ID: ISSN 2050-7526
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION

Citation Formats

Ming, Wenmei, Shi, Hongliang, and Du, Mao-Hua. Doping Y2O3 with Mn4+ for energy-efficient lighting. United States: N. p., 2018. Web. doi:10.1039/C8TC01154K.
Ming, Wenmei, Shi, Hongliang, & Du, Mao-Hua. Doping Y2O3 with Mn4+ for energy-efficient lighting. United States. doi:10.1039/C8TC01154K.
Ming, Wenmei, Shi, Hongliang, and Du, Mao-Hua. Wed . "Doping Y2O3 with Mn4+ for energy-efficient lighting". United States. doi:10.1039/C8TC01154K.
@article{osti_1435233,
title = {Doping Y2O3 with Mn4+ for energy-efficient lighting},
author = {Ming, Wenmei and Shi, Hongliang and Du, Mao-Hua},
abstractNote = {Developing energy-efficient LEDs that emit warm white light requires new red phosphors with appropriate emission wavelengths and band widths. Mn4+-activated Y2O3 is a potential red LED phosphor with narrow emission and improved emission wavelength compared to previously known Mn4+-activated oxide phosphors. Here in this work, the dopability and the oxidation state of Mn in Y2O3 are investigated based on the formation energies of native defects, Mn dopants, and divalent co-dopants (i.e., Ca, Sr, Cd, and Zn) calculated using hybrid density functional theory. We found that Mn4+ is difficult to form in Y2O3 without co-doping. Stabilizing Mn4+ on Y3+ sites (forming Mn+Y donors) requires the co-doping of compensating acceptors (Ca or Sr) in oxygen-rich growth environments.},
doi = {10.1039/C8TC01154K},
journal = {Journal of Materials Chemistry C},
number = 15,
volume = 6,
place = {United States},
year = {Wed Mar 28 00:00:00 EDT 2018},
month = {Wed Mar 28 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on March 28, 2019
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