A new broadband near-infrared emitting Mg2Al4Si5O18:Cr3+ phosphor for night-vision imaging. Issue 33 (4th August 2022)

• Record Type: Journal Article
• Authors: Chen, Guang; Nie, Wendong; Zuo, Jiaxing; Li, Yan; Han, Lei; Ye, Xinyu
• Is Part Of: Dalton transactions. Volume 51:Issue 33(2022)
• Page Start: 12576
• Page End: 12584
• Publication Date: 2022-08-04
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt01384c
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Phosphor-converted light-emitting diodes (pc-LEDs) have important applications in security surveillance and food testing. However, developing new broadband near-infrared phosphors remains an important issue. Abstract : Phosphor-converted light-emitting diodes (pc-LEDs) have important applications in security surveillance and food testing. However, developing new broadband near-infrared phosphors remains an important issue. Herein, the high-temperature solid-state reaction method was applied to synthesize a new type of Cr 3+ doped Mg2 Al4 Si5 O18 broadband NIR phosphor which matches a blue LED chip. It exhibits a broadband near-infrared (NIR) phosphor emission with a focus of 856 nm and a full width at half maximum >200 nm after excitation at 453 nm. The optimum concentration of Cr 3+ was established to contain 2 mol%. At 398 K, the luminescence intensity is 45.2% of that at 298 K. The power output of NIR pc-LEDs fabricated by incorporating a 450 nm chip and the Mg2 Al4 Si5 O18 :0.02 Cr 3+ phosphor is 19.69 mW at 300 mA current. Finally, the developed NIR pc-LED shows significant potential for use in night-vision imaging.