Blue-emitting fluorophosphate phosphor to enhance color rendition of near-ultraviolet LED white light

Nguyen Van Dung (Faculty of Engineering, Dong Nai Technology University)
Nguyen Le Thai (Faculty of Engineering and Technology, Nguyen Tat Thanh University)
Thuc Minh Bui (Faculty of Electrical and Electronics Engineering, Nha Trang University)
Huu Phuc Dang (Faculty of Fundamental Science, Industrial University of Ho Chi Minh City)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 33, No 2: February 2024

This work presents a novel blue phosphor, Na2MgPO4F: Eu2+ (NMPF: Eu) for violet 405-nm light-emitting diode (LED) devices. The compound is synthesized via a simple one-step sintering process using readily available precursors. Notably, NMPF: Eu exhibits highly efficient and thermally stable blue emission when excited by violet light. The NMPF: Eu is applied to produce a white LED device driven by a 405 nm LED chip and Y3Al5O12: Ce3+ (YAG: Ce) yellow phosphor. The impacts of NMPF: Eu phosphors are investigated by varying their particle size while maintaining consistent doping concentrations. Impressively, the LED prototype displays a substantial reduction in blue light emission while generating white light with enhanced color rendering and luminous properties. These results highlight the suitability and potential of NMPF: Eu as a promising phosphor for widening violet LED applications, especially in generating white light perceptible to the human eyes.