Mn^(4+)non-equivalent doped fluorides with long-wavelength and narrow-spectrum emission enable ultrawide-gamut display applications.However,existing synthesis schemes result in non-equivalent doped materials with subo...Mn^(4+)non-equivalent doped fluorides with long-wavelength and narrow-spectrum emission enable ultrawide-gamut display applications.However,existing synthesis schemes result in non-equivalent doped materials with suboptimal quantum efficiency.This study develops a group-substituted single-crystal(GSC)method assisted by a pre-nucleation strategy to achieve the growth of high-quality K_(2)LiGaF_(6):Mn^(4+)single crystals with optimal photoluminescence performance and chemical stability.To avoid the adverse effects caused by the long reaction time of Mn^(4+),the GSC method achieves rapid preparation of K_(2)LiGaF_(6):Mn^(4+)single crystals within 12 hours,which is 90%quicker than typical methods and beneficial in preventing the degradation of Mn^(4+).As a result,K_(2)LiGaF_(6):Mn^(4+)not only achieves a high external quantum efficiency of 57.15%but also exhibits excellent stability.A white light-emitting diode(LED)prepared using a blue light chip,commercial green phosphor(β-Sialon:Eu^(2+))and the optimized KLGFM-GSC can achieve an ultrawide color gamut display of 109.3%National Television Standards Committee(NTSC)or 80.7%Recommendation BT.2020(Rec.2020).In summary,synthesizing single crystals with the GSC method has good universality,opening up new ways for the preparation of high-quality Mn^(4+)non-equivalent doped fluoride single crystals and promoting the development of ultrawide color gamut display applications.展开更多
基金financially supported by the National Key Research and Development Program of China(2022YFB3503800 and 2022YFB3503802)National Natural Science Foundation of China(Grant No.52502172).
文摘Mn^(4+)non-equivalent doped fluorides with long-wavelength and narrow-spectrum emission enable ultrawide-gamut display applications.However,existing synthesis schemes result in non-equivalent doped materials with suboptimal quantum efficiency.This study develops a group-substituted single-crystal(GSC)method assisted by a pre-nucleation strategy to achieve the growth of high-quality K_(2)LiGaF_(6):Mn^(4+)single crystals with optimal photoluminescence performance and chemical stability.To avoid the adverse effects caused by the long reaction time of Mn^(4+),the GSC method achieves rapid preparation of K_(2)LiGaF_(6):Mn^(4+)single crystals within 12 hours,which is 90%quicker than typical methods and beneficial in preventing the degradation of Mn^(4+).As a result,K_(2)LiGaF_(6):Mn^(4+)not only achieves a high external quantum efficiency of 57.15%but also exhibits excellent stability.A white light-emitting diode(LED)prepared using a blue light chip,commercial green phosphor(β-Sialon:Eu^(2+))and the optimized KLGFM-GSC can achieve an ultrawide color gamut display of 109.3%National Television Standards Committee(NTSC)or 80.7%Recommendation BT.2020(Rec.2020).In summary,synthesizing single crystals with the GSC method has good universality,opening up new ways for the preparation of high-quality Mn^(4+)non-equivalent doped fluoride single crystals and promoting the development of ultrawide color gamut display applications.
