Synthesis and upconversion properties of KAlF4:Yb3+/Er3+ phosphor for bioimaging application

被引：7

作者：

Janbandhu, K. S. ^{[1
,2
]}

Pawade, V. B. ^{[1
]}

Dhoble, S. J. ^{[2
]}

Swart, H. C. ^{[3
]}

机构：

[1] Laxminarayan Inst Technol, Dept Appl Phys, Nagpur 440033, India

[2] RTM Nagpur Univ, Dept Phys, Nagpur 440033, India

[3] Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa

来源：

INFRARED PHYSICS & TECHNOLOGY | 2022年 / 126卷

关键词：

Synthesis method; UPC; Lanthanide; Applications; LUMINESCENCE; THERMOMETRY; NANOCRYSTALS; EMISSION; PHOTON; ENERGY; ER3+; NANOPARTICLES; MODULATION; PROBES;

D O I：

10.1016/j.infrared.2022.104328

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

This article reports a simple and green synthesis route for the preparation of Er3+/Yb3+-co doped KAlF4 upconversion phosphor. When annealed at 450 ?C, the crystalline phase of KAlF4 host changes from monoclinic to tetragonal. Upon 980 nm light irradiation, KAlF4: Er3+ phosphor shows two emission bands centred at 662 nm (F-4(9/2) -> I-4(15/2)) and 834 nm (S-4(3/2) -> I-4(13/2))respectively, in which the red emission band corresponds to the intra-4f transitions of Er3+ ions and hence the upconversion luminescence mechanism observed due to the two-photon process. With co-doping of Yb3+ ions, upconversion luminescence in KAlF4: Er3+ phosphor enhanced to few extend and exhibit two strong emission band appears invisible spectral range that consists of strong red emission band and two high-moderate green emission band. As a result, Er3+/Yb3+ co-doped KAlF4, laser-light excited upconversion phosphor may be an excellent candidate for bioimaging applications.

引用

页数：7