# Robust and orange-yellow-emitting Sr-rich polytypoid α-SiAlON (Sr3Si24Al6N40:Eu2+) phosphor for white LEDs

https://mdr.nims.go.jp/datasets/11642f90-ed78-488e-8496-94a4dea45008

## File

- [STAM 2024.pdf](https://mdr.nims.go.jp/filesets/e3da9fe8-c215-4132-8bd3-444c1a90311e/download) ([Detail](https://mdr.nims.go.jp/filesets/e3da9fe8-c215-4132-8bd3-444c1a90311e.md))

## Id

11642f90-ed78-488e-8496-94a4dea45008

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-09-24T01:38:32.404448Z

## Updated at

2024-09-25T07:30:35.329872Z

## Published at

2024-09-25T07:30:35.491060Z

## Doi



## First published url

https://doi.org/10.1080/14686996.2024.2396276

## Date published

2024-12-31

## Recorded date published

2024-12-31

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Robust and orange-yellow-emitting Sr-rich polytypoid α-SiAlON (Sr3Si24Al6N40:Eu2+)
    phosphor for white LEDs
  title_type: original
  lang: en

## Description

- description: "Nitrides and oxynitrides isostructural to α-Si3N4 (M-α-SiAlON, M =
    Sr, Ca, Li) possess\r\nsuperb thermally stable photoluminescence (PL) properties,
    making them reliable\r\nphosphors for high-power solid-state lighting. However,
    the synthesis of phase-pure Sr-αSiAlON still remains a great challenge and has
    only been reported for Sr below 1.35 at.%\r\nas the large size of Sr2+ ions tends
    to destabilize the α-SiAlON structure. Here, we\r\nsucceeded to synthesize the
    single-phase powders of a unique “Sr-rich” polytypoid αSiAlON (Sr3Si24Al6N40:Eu2+)
    phosphor with three distinctive Sr/Eu luminescence sites\r\nusing a solid-state
    remixing-reannealing process. The Sr content of this polytypoid structure\r\nexceeds
    those of a few previously reported structures by over 200%. The phase purity,\r\ncomposition,
    structure, and PL properties of this phosphor were investigated. A single phase
    can be obtained by firing the stoichiometric mixtures of all-nitride precursors
    at\r\n2050 °C under a 0.92 MPa N2 atmosphere. The Sr3Si24Al6N40:Eu2+ shows an
    intense\r\norange-yellow emission, with the emission maximum of 590 nm and internal/external\r\nquantum
    efficiency of 66%/52% under 400 nm excitation. It also has a quite small thermal\r\nquenching,
    maintaining 93% emission intensity at 150 °C. In comparison to Ca-αSiAlON:Eu2+,
    this Sr counterpart shows superior quantum efficiency and thermal stability,\r\nenabling
    it to be an interesting orange-yellow down-conversion luminescent material for\r\nwhite
    LEDs."
  description_type: abstract
  lang: eng

## Creator

- name: ESTILI Mehdi
  role: author
  orcid: https://orcid.org/0000-0003-1465-8148
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Optical Materials
    Field/Optical Ceramics Group
  ror: https://ror.org/026v1ze26
- name: Xie Rong-Jun
  role: author
  organization: Xiamen University
- name: TAKAHASHI Kohsei
  role: author
  orcid: https://orcid.org/0000-0002-6443-1534
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Optical Materials
    Field/Advanced Phosphor Group
  ror: https://ror.org/026v1ze26
- name: FUNAHASHI Shiro
  role: author
  orcid: https://orcid.org/0000-0002-9381-3603
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Optical Materials
    Field/Advanced Phosphor Group
  ror: https://ror.org/026v1ze26
- name: SUZUKI Tohru
  role: author
  orcid: https://orcid.org/0000-0001-9458-6863
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Optical Materials
    Field/Optical Ceramics Group
  ror: https://ror.org/026v1ze26
- name: HIROSAKI Naoto
  role: author
  orcid: https://orcid.org/0000-0001-9218-9557
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Optical Materials
    Field/Advanced Phosphor Group
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: Taylor & Francis

## Managing organization



## Keyword

- subject: phosphors
  schema: not_defined
- subject: nitrides
  schema: not_defined
- subject: photoluminescence
  schema: not_defined
- subject: powder synthesis
  schema: not_defined
- subject: White light emitting diodes
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
  issn: '14686996'
  volume: '25'
  issue: '1'
  start_page: 1
  end_page: 19
  article_number: '2396276'

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## Fileset

- id: e3da9fe8-c215-4132-8bd3-444c1a90311e
  filename: STAM 2024.pdf
  content_type: application/pdf
  size: 19233836
  md5: ed48841b79d04ab3173f10f298b0cce1

## Thumbnail

fileset_id: e3da9fe8-c215-4132-8bd3-444c1a90311e
filename: STAM 2024.pdf