# Luminescence Properties of Broadband Near-infrared Luminescent Material Ca5Ga6O14:Cr4+

https://mdr.nims.go.jp/datasets/ba0db714-9aff-48e5-a503-d5d00ccb960a

## File

- [SM4327.pdf](https://mdr.nims.go.jp/filesets/c282e11a-3c5e-4bbb-914d-a8ebb853f997/download) ([Detail](https://mdr.nims.go.jp/filesets/c282e11a-3c5e-4bbb-914d-a8ebb853f997.md))

## Id

ba0db714-9aff-48e5-a503-d5d00ccb960a

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-02-10T01:28:53.186998Z

## Updated at

2026-02-10T23:30:38.535723Z

## Published at

2026-02-10T09:03:06.735034Z

## Doi



## First published url

https://doi.org/10.18494/sam6005

## Date published

2026-02-06

## Recorded date published

2026

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Luminescence Properties of Broadband Near-infrared Luminescent Material Ca5Ga6O14:Cr4+
  title_type: original
  lang: en

## Description

- description: 'Broadband near-infrared-II (NIR-II) covered phosphors are crucial
    for LED applications such as biological imaging and optical sensing. In this study,
    Ca5Ga6−xO14: xCr phosphors, where x represents the molar concentration of Cr4+
    substituting Ga sites, were synthesized with x values of 0.0001, 0.0005, 0.005,
    0.01, 0.02, 0.03, and 0.04 using a conventional solid-state reaction.   X-ray
    diffraction showed that the main targeted phase was predominantly observed for
    Cr doping levels below x = 0.001. Optical characterizations revealed that the
    optimized phosphor (x = 0.0005) exhibited the most intense and broad NIR emission
    (1150–1600 nm, peak at 1330 nm) by 650 nm-excitation, originating from the spin-allowed
    3T2 → 3A2 transition of tetrahedrally coordinated Cr4+ ions. Low-temperature photoluminescence
    further elucidated the energetic and crystal field environment of Cr4+. These
    findings demonstrate that Ca5Ga6O14 is an efficient host for Cr4+-doped NIR-II
    phosphors, offering insights for the design of next-generation luminescent materials.'
  description_type: abstract
  lang: und

## Creator

- name: Aunsaya Eksatit
  role: author
  orcid: https://orcid.org/0000-0002-7702-1251
- name: Takayuki Nakanishi
  role: author
  orcid: https://orcid.org/0000-0003-3412-2842
- name: Takuya Ohmi
  role: author
- name: Akihiro Nakanishi
  role: author
  orcid: https://orcid.org/0009-0001-1859-261X
- name: Naoto Hirosaki
  role: author
  orcid: https://orcid.org/0000-0001-9218-9557
- name: Takashi Takeda
  role: author
  orcid: https://orcid.org/0000-0003-2510-4562
- name: Jian Xu
  role: author
- name: Jumpei Ueda
  role: author
- name: Koji Morita
  role: author
  orcid: https://orcid.org/0000-0001-6040-7054

## Contact agent



## Publisher

organization: MYU K.K.

## Managing organization



## Keyword

- subject: Cr4+ photoluminescence
  schema: not_defined
- subject: NIR phosphors
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Sensors and Materials
  issn: '09144935'
  volume: '38'
  issue: '2'
  start_page: 593
  end_page: 602

## Conference



## Related item



## Funding

- identifier: JP24K21774
  funder_name: " JSPS"
  description: 本研究は一部JSPS科研費の補助を用いて行われました。
- funder_name: 安全保障技術研究推進制度
  description: 本研究は、ATLA「データ科学と単粒子診断法を融合した新規赤外蛍光体開発の高速化」を用いて行われました。

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## Fileset

- id: c282e11a-3c5e-4bbb-914d-a8ebb853f997
  filename: SM4327.pdf
  content_type: application/pdf
  size: 1715826
  md5: 0d2e055401e8abf7cca534b5664ac93b

## Thumbnail

fileset_id: c282e11a-3c5e-4bbb-914d-a8ebb853f997
filename: SM4327.pdf