{"title":"Crystal Field-Engineered Cr<sup>3+</sup>-Doped Gd<sub>3</sub>(Mg<sub><i>x</i></sub>Ga<sub>5-2<i>x</i></sub>Ge<sub><i>x</i></sub>)O<sub>12</sub> Phosphors for Near-Infrared LEDs and X-ray Imaging Applications.","authors":"Tianlong Zeng, Ping Liu, Guoqiang Zeng, Xue Yu, Haozhe Liu, Xuanyu Zhu, Wenlong Huang, Guohao Wang, Lihui Hou, Mengyu Zhu, Yongzheng Fang, Ting Wang","doi":"10.1021/acs.inorgchem.4c01417","DOIUrl":null,"url":null,"abstract":"<p><p>Inorganic materials doped with chromium (Cr) ions generate remarkable and adjustable broadband near-infrared (NIR) light, offering promising applications in the fields of imaging and night vision technology. However, achieving high efficiency and thermal stability in these broadband NIR phosphors poses a significant challenge for their practical application. Here, we employ crystal field engineering to modulate the NIR characteristics of Cr<sup>3+</sup>-doped Gd<sub>3</sub>Ga<sub>5</sub>O<sub>12</sub> (GGG). The Gd<sub>3</sub>Mg<sub><i>x</i></sub>Ga<sub>5-2<i>x</i></sub>Ge<sub><i>x</i></sub>O<sub>12</sub> (GMGG):7.5% Cr<sup>3+</sup> (<i>x</i> = 0, 0.05, 0.15, 0.20, and 0.40) phosphors with NIR emission are developed through the cosubstitution of Mg<sup>2+</sup> and Ge<sup>4+</sup> for Ga<sup>3+</sup> sites. This cosubstitution strategy also effectively reduces the crystal field strength around Cr<sup>3+</sup> ions, which results in a significant enhancement of the photoluminescence (PL) full width at half-maximum (fwhm) from 97 to 165 nm, alongside a red shift in the PL peak and an enhancement of the PL intensity up to 2.3 times. Notably, the thermal stability of the PL behaviors is also improved. The developed phosphors demonstrate significant potential in biological tissue penetration and night vision, as well as an exceptional scintillation performance for NIR scintillator imaging. This research paves a new perspective on the development of high-performance NIR technology in light-emitting diodes (LEDs) and X-ray imaging applications.</p>","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.inorgchem.4c01417","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Inorganic materials doped with chromium (Cr) ions generate remarkable and adjustable broadband near-infrared (NIR) light, offering promising applications in the fields of imaging and night vision technology. However, achieving high efficiency and thermal stability in these broadband NIR phosphors poses a significant challenge for their practical application. Here, we employ crystal field engineering to modulate the NIR characteristics of Cr3+-doped Gd3Ga5O12 (GGG). The Gd3MgxGa5-2xGexO12 (GMGG):7.5% Cr3+ (x = 0, 0.05, 0.15, 0.20, and 0.40) phosphors with NIR emission are developed through the cosubstitution of Mg2+ and Ge4+ for Ga3+ sites. This cosubstitution strategy also effectively reduces the crystal field strength around Cr3+ ions, which results in a significant enhancement of the photoluminescence (PL) full width at half-maximum (fwhm) from 97 to 165 nm, alongside a red shift in the PL peak and an enhancement of the PL intensity up to 2.3 times. Notably, the thermal stability of the PL behaviors is also improved. The developed phosphors demonstrate significant potential in biological tissue penetration and night vision, as well as an exceptional scintillation performance for NIR scintillator imaging. This research paves a new perspective on the development of high-performance NIR technology in light-emitting diodes (LEDs) and X-ray imaging applications.
期刊介绍:
Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.