Improving the luminescence thermal stability of Ca3Y2Ge3O12:Cr3+ based on cation substitution and its application in NIR LEDs. Issue 6 (18th February 2022)

• Record Type: Journal Article
• Authors: Cui, Jia; Zheng, Yibo; Wang, Zhijun; Cao, Lingwei; Wang, Xuejiao; Yao, Yao; Zhang, Mengya; Zheng, Mingjie; Yang, Zhibin; Li, Panlai
• Is Part Of: Materials advances. Volume 3:Issue 6(2022)
• Page Start: 2772
• Page End: 2778
• Publication Date: 2022-02-18
• Subjects: 620.11
• DOI: 10.1039/d2ma00009a
• Languages: English
• ISSNs: 2633-5409

Abstract

Abstract : The emission intensity of Ca3 Y2 Ge3 O12 :Cr 3+ at 150 °C compared to that at room temperature increased from 28% to 68% by introducing larger radius Sr 2+ to adjust Ca 2+ in the host. Abstract : A near-infrared phosphor Ca3− x Sr x Y2 Ge3 O12 :Cr 3+ was synthesized by the solid-state method. When Sr 2+ replaces Ca 2+, 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 Ca3 Y2 Ge3 O12 :0.01Cr 3+ 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.