Abstract Herein, a red-emitting phosphor Ba2HfF8:Mn4+ was successfully synthesized by the hydrothermal method. This phosphor is of the similar orthorhombic structure with that of Ba2ZrF8:Mn4+ confirmed by the Rietveld refinement. The as-prepared Ba2HfF8:Mn4+ exhibits excellent red emission with a strengthened zero phonon line of Mn4+ under the blue-light excitation, indicating that Mn4+ experiences the low symmetry environment in this phosphor. Meanwhile, Mn4+ in the sample Ba2HfF8:Mn4+ (8.7 mol%) has the shorter decay time, compared with that in some hexafluoride phosphors. The white light-emitting diode (wLED) based on Ba2HfF8:Mn4+ (8.7 mol%) and Y3Al5O12:Ce3+ presents the excellent photoelectric performances with wide color gamut. So, Ba2HfF8:Mn4+ as a new red phosphor could find potential application on the backlight for displays.

中文翻译：

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用于显示器的具有强化零声子线 Mn4+ 的红色荧光粉 Ba2HfF8:Mn4+

摘要 本文采用水热法成功合成了一种发红光的荧光粉Ba2HfF8:Mn4+。该磷光体具有与 Ba2ZrF8:Mn4+ 相似的正交结构，由 Rietveld 精修证实。所制备的 Ba2HfF8:Mn4+ 在蓝光激发下表现出优异的红色发射，Mn4+ 的零声子线增强，表明 Mn4+ 在该磷光体中经历了低对称性环境。同时，与一些六氟化物荧光粉相比，样品 Ba2HfF8:Mn4+ (8.7 mol%) 中的 Mn4+ 具有更短的衰减时间。基于 Ba2HfF8:Mn4+ (8.7 mol%) 和 Y3Al5O12:Ce3+ 的白光发光二极管 (wLED) 表现出优异的光电性能和宽色域。因此，Ba2HfF8:Mn4+ 作为一种新的红色荧光粉可以在显示器背光源上找到潜在的应用。