# Large-scale irrigation of Cr3+ into different octahedra of zinc aluminate toward continual broadband near-infrared emission

https://mdr.nims.go.jp/datasets/14215cbf-7d62-4286-bb08-7990e2a96378

## File

- [CERI-D-ZnAl2O4(Cr3+).pdf](https://mdr.nims.go.jp/filesets/656703de-79a4-4156-8229-979875d06cc3/download) ([Detail](https://mdr.nims.go.jp/filesets/656703de-79a4-4156-8229-979875d06cc3.md))

## Id

14215cbf-7d62-4286-bb08-7990e2a96378

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-02-01T01:29:07.639783Z

## Updated at

2025-10-25T23:30:07.893065Z

## Published at

2025-10-25T23:17:01.946382Z

## Doi

https://doi.org/10.48505/nims.4400

## First published url

https://doi.org/10.1016/j.ceramint.2023.10.299

## Date published

2023-10-26

## Recorded date published

2024-1

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Large-scale irrigation of Cr3+ into different octahedra of zinc aluminate
    toward continual broadband near-infrared emission
  title_type: original
  lang: en

## Description

- description: Broadband near-infrared (NIR) phosphors, as key materials in NIR phosphor-converted
    light-emitting diodes (pc-LED) for emerging applications, have recently attracted
    considerable attention. Herein, by selecting a comprehensive engineering strategy
    of co-substituting [Al3+-Al3+] with [Mg2+-Ge4+] units and increasing Cr3+ concentration,
    a novel Cr3+-doped ZnAl1.16Mg0.4Ge0.4O4 (ZA(MG)0.4:2 at.%Cr3+) phosphor with continual
    broadband NIR emission was synthesized. The site occupation of Mg2+/Ge4+ in ZnAl2O4
    is unraveled by Rietveld structure refinement and density functional theory (DFT)
    calculations. According to the photoluminescence behaviors, the formed defect
    clusters of ZnAl’-Cr3+-GeAl·and MgAl’-Cr3+-GeAl· can not only introduce shallow
    defects to serve as new traps to obtain long-persistent luminescence but can also
    enhance the emission intensity at ~689 nm and ~694 nm. The quantity and scale
    of Cr3+-Cr3+ pairs and Cr3+ in distorted sites, which can improve the thermal
    quenching resistance and emission intensity in the range of 700-800 nm, can be
    accurately regulated by varying the concentration of Cr3+. Under 387 nm excitation,
    the designed material exhibits intensive NIR emission from 685 to 750 nm with
    a wide full-width at half maximum (FWHM) of 95 nm. The electroluminescence spectrum
    and potential applications of the NIR pc-LED prepared using ZA(MG)0.4:2 at.%Cr3+
    phosphor are also reported. The results promise a feasible strategy to develop
    NIR phosphors as NIR pc-LEDs lighting sources for applications in ondestructive
    detection and anticounterfeiting.
  description_type: abstract
  lang: eng

## Creator

- name: Lu Chen
  role: author
  organization: Northeastern University
- name: Sisi Yu
  role: author
  organization: Northeastern University
- name: Guichang Shen
  role: author
  organization: Northeastern University
- name: Shuai Tang
  role: author
  organization: Northeastern University
- name: Tao Zhang
  role: author
  organization: Northeastern University
- name: 李 継光
  role: author
  orcid: https://orcid.org/0000-0002-5625-7361
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Optical Materials
    Field/Polycrystalline Optical Material Group
  ror: https://ror.org/026v1ze26
- name: Qi Zhu
  role: author
  organization: Northeastern University

## Contact agent



## Publisher

organization: Elsevier

## Managing organization



## Keyword

- subject: Chemical unit co-substitution
  schema: not_defined
- subject: Defect clusters
  schema: not_defined
- subject: Distorted site
  schema: not_defined
- subject: Near-infrared persistent luminescence
  schema: not_defined
- subject: Broadband emission
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2023-10-26
end_date: 2025-10-26

## Journal

- title: Ceramics International
  issn: '18733956'
  volume: '50'
  issue: 1B
  start_page: 1956
  end_page: 1969

## Conference



## Related item



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## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



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## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Fileset

- id: 656703de-79a4-4156-8229-979875d06cc3
  filename: CERI-D-ZnAl2O4(Cr3+).pdf
  content_type: application/pdf
  size: 5662819
  md5: edab9a566b5df637bf7bd159f6bcbbcd

## Thumbnail

fileset_id: 656703de-79a4-4156-8229-979875d06cc3
filename: CERI-D-ZnAl2O4(Cr3+).pdf