Revealing Mn4+ Local Symmetry in Narrowband Red-Emitting Phosphor Rb2NaGaF6:Mn4+ for Wide-Color-Gamut Backlighting

作者：Zhe, Haifeng; Wang, Yuanjing; Li, Jing; Zhou, Yayun^*; Zhou, Qiang; Wang, Zhengliang^*

来源：ECS Journal of Solid State Science and Technology, 2021, 10(9): 096011.

DOI：10.1149/2162-8777/ac255c

• WHITE-LED APPLICATIONS
• LUMINESCENCE
• EFFICIENT
• GE
• SI
• TI

A red Mn4+-doped fluoride Rb2NaGaF6:Mn4+ (RNGFM) was synthesized by the co-precipitation method at mild conditions. Theoretical calculations reveal a vacancy of Rb+ forming with lower energy to balance the charge mismatch when one Mn4+ takes the place of one Ga3+ in RNGFM. The as-prepared RNGFM phosphor shows an internal quantum efficiency (IQE) of 70.3% excited by the blue light (similar to 460 nm). A wide color gamut of 108.6% vs NTSC was calculated and shown good potential for backlight LED displays.

• 单位
  云南大学