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Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
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Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.
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Sensors and Materials
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is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.
Instructions to authors
English 日本語
Instructions for manuscript preparation
English 日本語
Template
English
Publisher
MYU K.K.
Sensors and Materials
1-23-3-303 Sendagi,
Bunkyo-ku, Tokyo 113-0022, Japan
Tel: 81-3-3827-8549
Fax: 81-3-3827-8547
MYU Research, a scientific publisher, seeks a native English-speaking proofreader with a scientific background. B.Sc. or higher degree is desirable. In-office position; work hours negotiable. Call 03-3827-8549 for further information.
MYU Research
(proofreading and recording)
MYU K.K.
(translation service)
The Art of Writing Scientific Papers
(How to write scientific papers)
(Japanese Only)
Sensors and Materials, Volume 33, Number 6(4) (2021)
Copyright(C) MYU K.K.
Copyright(C) MYU K.K.
|
pp. 2227-2234
S&M2611 Research Paper of Special Issue https://doi.org/10.18494/SAM.2021.3320 Published: June 24, 2021 Near-infrared Phosphors: Photophysical Properties of Calcium-doped YSGG:Cr4+ [PDF] Takayuki Nakanishi, Makoto Tsurui, Jian Xu, Nao Takahashi, Takashi Takeda, and Naoto Hirosaki (Received January 30, 2021; Accepted May 10, 2021) Keywords: garnet, near-infrared, chromium, luminescence
Toward developing super-broadband LEDs using NIR phosphors, the effect of Ca substitution on the luminescence of Cr-doped Y3Sc2Ga3O12 garnet (YSGG) was evaluated. The valence of chromium ions in YSGG mainly takes two states, trivalent and tetravalent, and YSGG shows luminescence peaks at 740 nm (Cr3+) in octahedral Sc sites and at 1530 nm (Cr4+) in distorted tetrahedral Ga sites. The garnet host is very suitable for optical-sensing LED applications because these two emission bands closely match two NIR windows, NIR-I (600–950 nm) and NIR-III (1500–1800 nm), which are applied for bio-imaging. In this study, we demonstrated that the Cr4+ broad emission was improved by Ca substitution to control the photophysical properties. We concluded that YSGG:Cr4+ with D2d symmetry in a unique distorted tetrahedron is a promising NIR phosphor for light-emitting applications.
Corresponding author: Takayuki Nakanishi  This work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Takayuki Nakanishi, Makoto Tsurui, Jian Xu, Nao Takahashi, Takashi Takeda, and Naoto Hirosaki, Near-infrared Phosphors: Photophysical Properties of Calcium-doped YSGG:Cr4+, Sens. Mater., Vol. 33, No. 6, 2021, p. 2227-2234. |
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