Improving the luminescence thermal stability of Ca3Y2Ge3O12:Cr3+ based on cation substitution and its application in NIR LEDs

Jia Cui; Yibo Zheng; Zhijun Wang; Lingwei Cao; Xuejiao Wang; Yao Yao; Mengya Zhang; Mingjie Zheng; Zhibin Yang; Panlai Li

doi:10.1039/D2MA00009A

Improving the luminescence thermal stability of Ca₃Y₂Ge₃O₁₂:Cr³⁺ based on cation substitution and its application in NIR LEDs†

Jia Cui,^a Yibo Zheng,*^b Zhijun Wang,

*^a Lingwei Cao,^a Xuejiao Wang,^a Yao Yao,^a Mengya Zhang,^a Mingjie Zheng,^a Zhibin Yang^a and Panlai Li

*^a

Author affiliations

* Corresponding authors

^a National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University, Baoding 071002, China
E-mail: wangzj1998@126.com, li_panlai@126.com

^b Hebei Key Laboratory of Optoelectronic Information and Geo-detection Technology, Hebei GEO University, Shijiazhuang 050031, China
E-mail: yibo_zheng@126.com

Abstract

A near-infrared phosphor Ca_3−xSr_xY₂Ge₃O₁₂:Cr³⁺ was synthesized by the solid-state method. When Sr²⁺ replaces Ca²⁺, the thermal stability of the phosphor is obviously improved and the emission intensity at 150 °C can retain 68% of that at room temperature, and its activation energy E_a is 0.331 eV. A novel near-infrared LED was obtained by packaging Ca₃Y₂Ge₃O₁₂:0.01Cr³⁺ and a 455 nm blue chip, and the luminescence intensity increased with increasing working current. The results indicate that this phosphor may have a potential application in near-infrared LEDs.

Materials Advances

Improving the luminescence thermal stability of Ca₃Y₂Ge₃O₁₂:Cr³⁺ based on cation substitution and its application in NIR LEDs†

Abstract

Supplementary files

Article information

Download Citation

Permissions

Improving the luminescence thermal stability of Ca₃Y₂Ge₃O₁₂:Cr³⁺ based on cation substitution and its application in NIR LEDs

Social activity

Search articles by author

Spotlight

Advertisements

Materials Advances