An activator’s selective occupation of a host is of great significance for designing high-quality white light-emitting diodes (w-LEDs) phosphors, while achieving a full-spectrum single-phase white light emission phosphor is challenging. For developing high-performance and green-emitting phosphors with narrow bands used for backlight display, a series of NaMgAlO:xMn (NMAO:xMn) phosphors with high Mn concentration were synthesized. The NMAO:0.65Mn green phosphor exhibits an ultra-narrow band green emission with full width at half maximum (FWHM) about 27 nm and peak position at 513 nm when excited by the blue light with wavelength of 450 nm. The NMAO:0.65Mn not only has a super narrow band which is narrower than -SiAlON:Eu (FWHM ∼ 55 nm) but also shows an exceptional thermal stability performance (77% peak intensity @423 K). A w-LED device was assembled with NMAO:0.65Mn, a blue GaInN chip and KSiF:Mn phosphors, which represents a wide color-gamut of 112% National Television System Committee (NTSC) standard under the current of 50 mA. These results demonstrate the NMAO:0.65Mn has potential superiority in application of backlight display.

中文翻译：

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背光显示用新型窄带绿光Na2MgAl10O17:Mn2+荧光粉的合成及发光性能

激活剂选择性占据主体对于设计​​高质量白光发光二极管（w-LED）荧光粉具有重要意义，但实现全光谱单相白光发射荧光粉具有挑战性。为了开发用于背光显示的高性能、窄带绿光荧光粉，合成了一系列高Mn浓度的NaMgAlO:xMn (NMAO:xMn)荧光粉。 NMAO:0.65Mn绿色荧光粉在波长为450 nm的蓝光激发下表现出超窄带绿光发射，半峰全宽(FWHM)约为27 nm，峰值位置为513 nm。 NMAO:0.65Mn不仅具有比-SiAlON:Eu (FWHM ∼ 55 nm)更窄的超窄带，而且还表现出优异的热稳定性能（77%峰值强度@423 K）。 w-LED 器件由 NMAO:0.65Mn、蓝色 GaInN 芯片和 KSiF:Mn 荧光粉组装而成，在 50 mA 电流下具有 112% 美国国家电视系统委员会 (NTSC) 标准的宽色域。这些结果表明NMAO:0.65Mn在背光显示应用中具有潜在的优势。