K2SiF6:Mn4 的( )自旋禁阻跃迁使发射光谱在红光区产生窄带的红光发射。 A. 4A2g→4T1g B4A2g→4T1g B. 2Eg→4A2g C. 2E
K2SiF6:Mn4+的( )自旋禁阻跃迁使发射光谱在红光区产生窄带的红光发射。A.2Eg→4A2gB.4A2g→4T1gC.2Eg→4T1gD.4A2g→4T2g
K2SiF6:Mn4+耐湿性惰性壳层白光LED乳糖酸耐湿性差是掺Mn^(4+)氟化物红色荧光粉在高稳定性器件应用中面临的一个瓶颈问题.本工作提出利用乳糖酸的钝化效应清除K_(2)Si F_(6):Mn^(4+)表面的Mn^(4+),重构无Mn^(4+)的氟化物惰性壳层,以提升其耐湿性.结果表明,经乳糖酸钝化后的氟化物的晶相,形貌及发光...
本发明公开一种K2SiF6:Mn4+纳米荧光粉体的制备方法,属于LED荧光粉技术领域,包括以下步骤:将正硅酸四乙酯溶解于乙醇中得到A溶液;将KF溶解于乙酸中得到B溶液;将B溶液滴加至A溶液中,充分搅拌后陈化一段时间。清洗干燥后得到K2SiF6基体。然后将K2MnF6溶解于氢氟酸与硫酸的混合溶液中,将制备的K2SiF6基体放入其中,...
摘要:研究了白光ＬＥＤ用Ｋ２ＳｉＦ６ʒＭｎ４＋红色荧光粉湿热环境下的发光性能劣化规律及机理ꎮ结果表明ꎬ环境中水汽的侵蚀可导致Ｋ２ＳｉＦ６ʒＭｎ４＋荧光粉发光性能劣化ꎬ且温度升高可加剧该劣化过程ꎮ８５％湿度/７０ħ下处理６ｈꎬＫ２ＳｉＦ６ʒ７％Ｍｎ４＋荧光粉相对亮度降至初始值的２５...
K2SiF6:Mn4+ single crystal phosphors are grown by a facile saturated crystallization method, with the simultaneous fulfillment of high external quantum efficiency (EQE = 78.2%), excellent moisture and thermal resistance, and effective heat dissipation. This work strengthens the competitiveness of ...
K2SiF6:Mn4+的( )自旋禁阻跃迁使发射光谱在红光区产生窄带的红光发射。A.2Eg→4A2gB.4A2g→4T1gC.2Eg→4T1gD.4A2g→4T2g的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题库手机刷题,以提
没有改变K2SiF6:Mn^4+的晶格结构,样品具有立方晶系结构.通过荧光光谱图发现当K/Mn摩尔比为43/38在反应8h合成的样品激发峰和发射峰强度最强,激发峰一般由^460nm(^4 A2→^4 T2)强峰和^360nm(^4 A2→^4 T1)次强峰组成,有时会伴有一些弱峰,在460nm的激发下,最强窄带发射峰位于630nm处(^2Eg→^4 A2)...
We demonstrate a method of synthesizing K2SiF6:Mn4+ red phosphor by wet chemical etching. The starting materials used are silica glasses (fused quartz, borosilicate, and soda-lime glasses). The red phosphor emitting at lambda similar to 630 nm is synthesized by inserting the silica glasses into...
K2SiF6:Mn4+ (KSF:Mn4+), as an efficient red-emitting phosphor, has a promising application in WLEDs (white light-emitting diodes). However, poor moisture resistance performance still hinders its deeper commercialization. Here, KSF:Mn4+@ CaF2 with high water resistance and luminescent thermal ...