Doping Y2O3 with Mn4+ for energy-efficient lighting

Ming, Wenmei; Shi, Hongliang; Du, Mao-Hua

doi:10.1039/C8TC01154K

Title: Doping Y₂O₃ with Mn⁴⁺ 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. 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.

Authors:

^[1];

^[2];

^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
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:: Wed Mar 28 00:00:00 EDT 2018

Research Org.:: Oak Ridge National Laboratory (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:: 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.

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                    Ming, Wenmei, Shi, Hongliang, & Du, Mao-Hua. Doping Y2O3 with Mn4+ for energy-efficient lighting.  United States.  https://doi.org/10.1039/C8TC01154K

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                    Ming, Wenmei, Shi, Hongliang, and Du, Mao-Hua. Wed .  
"Doping Y2O3 with Mn4+ for energy-efficient lighting".  United States.  https://doi.org/10.1039/C8TC01154K.  https://www.osti.gov/servlets/purl/1435233.

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@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}

}

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Title: Doping Y2O3 with Mn4+ for energy-efficient lighting

Abstract

Citation Formats

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A Simple, Efficient Synthetic Route to Sr ₂ Si ₅ N ₈ :Eu ²⁺ -Based Red Phosphors for White Light-Emitting Diodes
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On the Performance Enhancement of Nitride Phosphors as Spectral Conversion Materials in Solid State Lighting
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Point defects and related properties of highly co-doped bixbyite In ₂ O ₃
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Luminescence Properties of a Red Phosphor, CaAlSiN[sub 3]:Eu[sup 2+], for White Light-Emitting Diodes
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Mn[sup 4+]-Activated Red Photoluminescence in K[sub 2]SiF[sub 6] Phosphor
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