Ba3(ZnB5O10)PO4:Tb3+ green phosphor: Microwave-assisted sintering and stable

Green phosphor has become increasingly an attractive focus owing to its multifunctional applications in illumination, display, anti-counterfeiting, and even bio-labeling. In this paper, trivalent terbium (Tb3+)-activated Ba3(ZnB5O10)PO4 (BZBP) green phosphors were synthesized at 1050 K for 1 h via a microwaveassisted sintering route. The structural study, influence of dopant Tb3+ content and working temperature on photoluminescence behavior, and colorimetric properties were performed comprehensively. Tb3+ successfully substitutes Ba2+ in the BZBP lattice. Under 378 nm near-ultraviolet (NUV) excitation, the emission bands peak at 488, 542, 585, and 623 nm, corresponding to the 5D4 -> 7F6, 5D4 -> 7F5, 5D4 -> 7F4, and 5D4 -> 7F3 transitions of Tb3+, respectively. Despite the working temperature increases, the title phosphor maintains the high emission intensity and low chromaticity shifting, exhibiting robust thermostability and color stability. This work provides a simple and rapid synthesis method for borophosphate-based phosphor. The application of NUV-excited white light-emitting diodes fabricated with the title product and commercial phosphors (red, blue) indicates that the developed green phosphor BZBP:Tb3+ is a promising candidate material in illumination and display applications.

Automated summary

This paper reports the synthesis of trivalent terbium-activated green phosphors and comprehensively investigates their structure, photoluminescence behavior, and colorimetric properties. The results show that the phosphors exhibit high emission intensity, low chromaticity shifting, and robust thermostability and color stability, making them promising candidates for illumination and display applications.