Eu²⁺ activated NaBa₃Si₂O₇F: A new efficient blue‐emitting luminescent material for solid‐state lighting and display

Abstract

Exploring novel efficient phosphors for lighting and display has always been an important and meaningful work for researchers. Herein, a novel efficient blue‐emitting phosphor, Eu2+ doped barium‐containing silicate fluoride NaBa3Si2O7F, was prepared by solid‐state method. The phosphor can produce bright blue light peaked at 452 nm with full‐width at half‐maximum about 57 nm under near‐UV light excitation, and it exhibits a high internal quantum yield about 76.23%. The temperature‐dependent photoluminescence spectra show that this phosphor owns good thermal stability, and the emission intensity at 425 K is 67% of that at room temperature. The outstanding data of fabricated device demonstrate that the blue phosphor has large possibility of practical application for white light‐emitting diode. Furthermore, the phosphor also possesses good cathodoluminescence properties under various accelerating voltage with different probe currents, indicating its potential application in field emission displays.

Design of highly efficient energy transfer phosphor Sr4Al14O25:Eu2+,Mn4+ with deep-red emission and application potential in plant growth

“…S5(c) (ESI†), it is worth noting that the emission spectrum of e2 overlaps greatly with the excitation spectrum of e1, and there is also energy transfer between these two excited states. 42 In other words, because the energy barrier between e1 and e2 is lower at slightly higher temperatures, electrons from e2 can easily reach the e1 state (shown by the purple dashed line in Fig. 8(f)), and more electrons reach the ground state from the e1 process, so the emission peak at Eu 2 2+ site weakens with increasing temperature until it disappears, as seen in Fig.…”

Synthesis and photoluminescence of novel blue‐emitting phosphor of Eu2+‐activated fluoroborate BaGaBO3F2

“…Eu 2+ ions typically exhibit broad luminescence transitions strongly depending on their electronic configuration and the crystal field environment, 9 consequentially its luminescence chromaticity changes from ultraviolet to near‐infrared. Eu 2+ has the applications in solid‐state lighting, biomedical imaging, X‐ray fluorescence, plasma display panels, sensors, etc 10–13 . The research on Eu 2+ luminescence has focused on improving the efficiency and stability of Eu 2+ ‐based materials.…”

“…Eu 2+ has the applications in solid-state lighting, biomedical imaging, X-ray fluorescence, plasma display panels, sensors, etc. [10][11][12][13] The research on Eu 2+ luminescence has focused on improving the efficiency and stability of Eu 2+ -based materials. One challenge is achieving high luminescent quantum yields and stability under different environmental conditions.…”