Multiple lattice sites occupied AlTaO4:Cr3+phosphor for luminescence ratiometric thermometry and NIR light source

被引：24

作者：

Jiang, Lipeng ^{[1
]}

Zhang, Liangliang ^{[2
]}

Jiang, Xue ^{[1
]}

Lv, Guocai ^{[3
]}

Su, Yanjing ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Corros & Protect Ctr, Beijing 100083, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Luminescence & Applicat, 3888 Eastern South Lake Rd, Changchun 130033, Peoples R China

[3] Univ Sci & Technol Beijing, Basic Expt Ctr Nat Sci, Beijing 100083, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 970卷

基金：

中国国家自然科学基金;

关键词：

Luminescence thermometry; Near-infrared; LED; Cr3+;

D O I：

10.1016/j.jallcom.2023.172544

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cr3+-doped near infrared (NIR) phosphors have promising applications in NIR light sources and optical temperature detection. The development of materials with high relative sensitivity and efficient broadband NIR luminescence is the key. In this paper, we report a new multifunctional NIR phosphor AlTaO4:Cr3+, which contains both narrow-band emission associated with 2Eg+4A2 g transition and broadband emission induced by the 4T2 g+4A2 g transition owing to Cr3+ occupies both AlO6 and TaO6 lattice sites. The R-line (2Eg+4A2 g) emission and its anti-Stokes phonon sideband emission follow the Boltzmann distribution, and the thermometer constructed accordingly reaches a maximum Sr of 1% K-1 at 110 K. Under 425 nm excitation, the broad emission band (FWHM = 200 nm) reaches maximum at 880 nm with an internal quantum efficiency of 62.8%. The NIR LEDs prepared with AlTaO4:Cr3+ confirm the application value in NIR light sources.

引用

页数：7

共 51 条

[41] Cr3+-Doped Broadband NIR Garnet Phosphor with Enhanced Luminescence and its Application in NIR Spectroscopy [J].