New thermally stable red-emitting phosphors Pr3+, M+:SrB4O7 (M=Li, Na, K)

作者：Xiong, F. B.^*; Lin, H. F.; Xu, Y. C.; Shen, H. X.; Zhu, W. Z.

来源：Journal of Luminescence, 2016, 177: 99-103.

DOI：10.1016/j.jlumin.2016.04.035

• Luminescence
• Phosphors
• Concentration quenching
• Thermal stability
• White LED

New red-emitting phosphors Pr3+, M+:SrB4O7 (M =Li, Na, K) in pure phase were synthesized via high-temperature solid-state reaction. Luminescent properties of those phosphors were characterized in detail. Pr3+ M+:SrB4O7 (M=Li, Na, K) can be excited under the range of 430-500 nm excitation, which covers the emission spectra of blue InGaN chip, exhibits pure red emission bands centered at 605 and 662 nm. The alkali-metal Li+ Na+ or K+ acting as charge compensators can improve fluorescent emission intensities of Pr3+ ions, and Pr3+, Na+:SrB4O7 shows the strongest emission intensities among those phosphors. Concentration quenching could be attributed to electric dipole-dipole interaction among Pr3+ ions. The temperature-dependent luminescence indicated Pr3+, Na+:SrB4O7 shows highly thermal stability. Those work suggests that Pr3+, M+:SrB4O7 (M=Li, Na, K) as thermally stable red emitting phosphor might be potentially applied in WLED.

• 出版日期2016-9
• 单位厦门理工学院